bluuebunny/crossref_metadata_2025 huggingface dataset:
Neutral-Carrier-Type Ion-Sensing Membranes Based on Sol-Gel-Derived Glass
Authors: Kimura Keiichi , Sunagawa Takenobu , Yokoyama Masaaki
Published: March 2006

Typical neutral carriers, valinomycin and a bis(12-crown-4) derivative have been encapsulated in sol-gel-derived glasses to afford a novel type of ion-sensing membranes based on neutral carriers for ion-sensitive field-effect transistors (ISFETs). The neutral-carrier-based sol-gel-derived glass membranes, when incorporated in the ion sensors, showed high sensitivity, high selectivities, and fast potential response.
Stereodivergent Diels-Alder Reactions Employing Cyclitols as Chiral Auxiliaries
Authors: Akiyama Takahiko , Horiguchi Naofumi , Ida Tomoaki , Ozaki Shoichiro
Published: March 2006

The TiCl4 or SnCl4 mediated Diels-Alder reaction of cyclopentadiene and chiral acryloyl ester derived from chiral cyclitols proceeded with excellent diastereoselectivity in Et2O via re-face attack of the acrylates. In contrast, interesting changeover of the diastereofacial selectivity was observed by use of toluene or hexane as a solvent to afford the cycloadducts derived from si-face attack of the acrylates.
Microscopic Observation of Photocatalytic Reaction Using Microelectrode: Spatial Resolution for Reaction Products Distribution
Authors: Ikeda Katsuyoshi , Sakai Hideki , Baba Ryo , Hashimoto Kazuhito , Fujishima Akira
Published: March 2006

We employed a Pd-loaded TiO2 film as a simple model for the metal-deposited photocatalyst and carried out spatial mapping of reaction products formed by the photocatalytic reactions in a Fe(CN)63−⁄4− aqueous solution using a microelectrode. The experimental data were simulated with a diffusion model solved by the finite difference method. The results indicate that the spatial resolution of ca. 70 μm can be obtained with a distance of 30 μm between the sample surface and the microelectrode.
Synthesis, Characterization, and Reactivities of Heterobimetallic μ-Aryl Isocyanide Complexes with an Unusual Bridging Structure
Authors: Ishii Youichi , Kawaguchi Masayuki , Hidai Masanobu
Published: March 2006

Reaction of [NBu4][W(CN)(N2)(dppe)2] with [RuCp(η6-p-FC6H4R)][PF6] gave novel μ-aryl isocyanide complexes [WF{CN(η5-p-C6H4R)RuCp}(dppe)2] (3) through the arylation of the CN ligand concurrent with the loss of the dinitrogen ligand. The X-ray crystallographic study of 3a (R = H) revealed the unusual η1:η5-μ2-coordination of the phenyl isocyanide behaving as an iminocarbyne-cyclohexadienyl ligand.
Generation of α-Nitroalkyl Radicals by Oxidation of Nitronate Anions with Cerium(IV) Ammonium Nitrate and Their Addition Reaction to Electron-Rich Olefins
Authors: Arai Noriyoshi , Narasaka Koichi
Published: March 2006

α-Nitroalkyl radicals are generated by oxidation of nitronate anions with cerium(IV) ammonium nitrate. When the reactions are carried out in the presence of electron-rich olefins, such as silyl enol ethers, intermolecular addition of the radicals proceeds to afford β-nitroketones, which are further converted to α,β-unsaturated ketones in good yield.
Raman Spectroscopic Observations of Anomalous Conformational Behavior of Short Poly(oxyethylene) Chains in Water
Authors: Masatoki Sei , Takamura Motomu , Matsuura Hiroatsu , Kamogawa Keiji , Kitagawa Teizo
Published: March 2006

The Raman spectra of aqueous solutions of CH3(OCH2CH2)mOCH3 (m = 1−4) were measured for mole fractions down to 0.005. The spectral observation for the compounds with m ≥ 2 indicates that, on addition of water, the POE chain progressively prefers the gauche conformation for the OCH2–CH2O segment at the first stage, but this direction of the conformational preference is reversed for concentrations lower than a particular solution composition. This anomalous conformational behavior is suggestive of a new structural aspect of the POE–water system.
Synthesis and Properties of 1-(Tropon-2-yl)-1-aza-4,7,10,13-tetraoxacyclopentadecanes. Preferential Complexation of Lithium Salt among the Alkali Salts
Authors: Takeshita Hitoshi , Wang Qian Fan , Kubo Kanji , Mori Akira
Published: March 2006

1-(Tropon-2-yl)-1-aza-l5-crown-5 ether and 1-(7-bromotropon-2-yl)-1-aza-15-crown-5 ether were prepared by condensation of 1-aza-15-crown-5 ether and appropriate derivatives. Spectrophotometric titration of the 1:1-complexes of these crown derivatives showed a preferential complexation with lithium salt over other alkali metal salts. Thus, structural modification by capping with tropone system altered the selectivity.
Chiral Assembly of Porphyrins Regulated by Amphiphilic α-Helix Peptides
Authors: Mihara Hisakazu , Haruta Yasuaki , Sakamoto Seiji , Nishino Norikazu , Aoyagi Haruhiko
Published: March 2006

Amphiphilic α-helix peptides carrying porphyrin moieties were designed and synthesized. The tetraphenylporphyrins were able to be fixed and arranged with a chiral twist in a three-dimensional structure constructed by the amphiphilic assembly of the α-helices.
Synthesis of BEDT-BDTBS and Crystal Structures of Its Conducting Cation Radical Salts
Authors: Takahashi Kazuko , Ise Toshihiro , Mori Takehiko , Mori Hatsumi , Tanaka Shoji
Published: March 2006

1,3-Bis(4,5-ethylenedithio-1,3-dithiol-2-ylidene)-1,3-dihydrobenzo[c]selenophene (BEDT-BDTBS) has been synthesized by a convenient method and the electric properties and X-ray crystal structures of its single-crystalline cation radical salts have been clarified.
Substituent-Dependent Selective Replacement of Alkyne Moieties of Zirconacyclopentadienes via C-C Bond Cleavage Reaction
Authors: Hara Ryuichiro , Xi Zhenfeng , Kotora Martin , Xi Chanjuan , Takahashi Tamotsu
Published: March 2006

Replacement of an alkyne moiety of zirconacyclopentadienes via β,β′-carbon-carbon bond cleavage was highly dependent on their substituents. Complete differentiation between diphenylacetylene and 4-octyne in the reaction with butyronitrile was demonstrated.
Mediated Electrocatalytic Reduction of Nitrate and Nitrite Based on the Denitrifying Activity of Paracoccus denitrificans
Authors: Takayama Katsumi , Kano Kenji , Ikeda Tokuji
Published: March 2006

A carbon electrode modified with immobilized cells of Paracoccus denitrificans has been found to produce catalytic currents for the reduction of nitrate and nitrite in the presence of durohydroquinone. It has been shown that durohydroquinone functions as an electron transfer mediator between the electrode and the bacterial cells to drive electrochemically the denitrifying reaction of Paracoccus denitrificans.
Preparation and Crystal Structure of [Ni(H2tmtaa)][AlCl4]2: A Tetraazamacrocyclic Complex with Isolated Diimine Units in the Six-Membered Chelate Rings
Authors: Tsai Yaw-Huei , Lin Chu-Chieh
Published: March 2006

A nickel-tetraazamacrocyclic complex, Ni(H2tmtaa), with a novel structure was synthesized from the reaction of Ni(tmtaa) with 1,3-dibenzenedicarbonyl dichloride in the presence of AlCl3. The title compound losses proton readily in basic solution.
Hydrosilylation of Olefins with Monosilane in the Presence of Lithium Aluminum Hydride
Authors: Kobayashi Mineo , Itoh Masayoshi
Published: March 2006

Hydrosilylation reactions of 1-hexene and ethylene with SiH4 occurs in the presence of LiAlH4 as a catalyst. Hexylsilane and dihexylsilane were produced from 1-hexene and SiH4. Ethylsilane was produced from ethylene and SiH4. The reaction mechanism involving SiH4 and the alkyl anion, which is formed by the interaction between LiAlH4 and the olefin, has been proposed.
Intrapore Catalysis in NO Reduction with Methane on Ir/In/H-ZSM-5 Catalyst
Authors: Ogura Masaru , Kikuchi Eiichi
Published: March 2006

Chemisorption of NOx on In/H-ZSM-5, Ir/In/H-ZSM-5, and the physical mixture of Ir/H-ZSM-5 and In/H-ZSM-5, and the catalytic activities of these catalysts for NO reduction with methane are studied to understand the role of Ir onto In/H-ZSM-5. The amount of NOx chemisorption on Ir/In/H-ZSM-5 was largest among the catalysts tested. The catalytic activities for NOx reduction on these catalysts were well correlated to the amount of chemisorbed NOx. The dual-functional mechanism, that is, NO oxidation and NO2 reduction with CH4 works effectively on Ir and [InO]+ sites, respectively, in the same zeolite pore, as an intrapore catalysis.
Palladium-Catalyzed C-Allylation of Naphthols by Direct Use of Allylic Alcohols under Neutral Conditions
Authors: Tada Yuzuki , Satake Akiharu , Shimizu Isao , Yamamoto Akio
Published: March 2006

C-Allylation of 1- or 2-naphthols to give mono-, di-, and triallylnaphthols selectively using allylic alcohols directly under neutral conditions has been realized by employing palladium catalysts in the presence of molecular sieve 4A. This method is also applicable for the multiple allylation of 2,6-dihydroxynaphthalene.
Action Spectra of Non-Resonant Two-Photon (NRTP) Isomerization of α,ω-Diphenylpolyenes
Authors: Miyazawa Takashi , Liu Zhenlin , Liu Chengyou , Koshihara Shin-ya , Kira Mitsuo
Published: March 2006

The efficiency of the non-resonant two-photon (NRTP) isomerizations of stilbenes and 1,4-diphenyl-1,3-butadienes were found to depend strongly on the wavelength of the laser pulses. The results not only confirm the 21Ag nature of the excited states responsible for the cis-trans isomerizations but also demonstrate that the action spectra of the NRTP reactions correspond to the two-photon allowed absorption bannds.
Useful Synthesis of 2,3,6-Polythiazolesubstituted Pyridine Skeleton [Fragment A-C] of Peptide Antibiotic, Micrococcin P
Authors: Okumura Kazuo , Shigekuni Masashi , Nakamura Yutaka , Shin Chung-gi
Published: March 2006

Practical synthesis of 2,3,6-trithiazolesubstituted pyridine skeleton [Fragment A-C] of peptide antibiotic micrococcin P was achieved from 3-cyano-6-dimethoxymethyl-2-pyridone in twelve steps.
Partial Oxidation of Methane to Synthesis Gas with Iridium-loaded Titania Catalyst
Authors: Nakagawa Kiyoharu , Suzuki Toshimitsu , Kobayashi Tetsuhiko , Haruta Masatake
Published: March 2006

Ir(5 wt%) supported on TiO2 afforded a high activity for the partial oxidation of methane into CO and H2 with the selectivity of above 80% at 600 °C.
A Highly Sensitive Ammonia Gas Sensor Based on an Ag+/K+ Composite Ion Doped Glass Optical Waveguide System
Authors: Chen Xiao-Min , Itoh Kiminori , Murabayashi Masayuki , Igarashi Chiaki
Published: March 2006

A highly sensitive optical waveguide sensor was developed for gaseous ammonia detection. It was based on an Ag+/K+ composite ion doped glass optical waveguide (OWG). A thin sensing film, consisting of a polymer matrix and a dye, was coated onto the optical waveguide (OWG) surface. Its response was reversible and quick (< 2.5 min), and detection limit was less than 100 ppb.
Metalloporphyrin as an Efficient Catalyst in the Regioselective Isomerization of Epoxides to Carbonyl Compounds
Authors: Takanami Toshikatsu , Hirabe Rina , Ueno Masayoshi , Hino Fumio , Suda Kohji
Published: March 2006

Regioselective ring-opening isomerization of epoxides to carbonyl compounds can effectively be catalyzed by iron (III) tetraphenylporphyrin, Fe(tpp)ClO4.
Tracer Diffusion of a Ligand-Stabilized Two-Shell Gold Cluster
Authors: Tominaga Toshihiro , Tenma Shoji , Watanabe Hiroshi , Giebel Ursula , Schmid Günter
Published: March 2006

Diffusion coefficients have been measured for the two-shell cluster of Au55(Hdpbs) 12Cl6 (Hdpbs = diphenylphosphino-benzene-3-sulfonic acid) in water at varying ionic strengths. Hydrodynamic radius of the particles are found to be 1.44 nm as calculated from the diffusion coefficient at sufficiently high ionic strengths. This is a little larger than the radius obtained from the AFM image. The diffusion coefficients decrease with decreasing ionic strength, indicating the electrostatic drag due to the ionic atmosphere.
Diquinane Synthesis Based on Anionic [1, 3] Sigmatropic Rearrangements of an Oxy-Cope System Incorporated in the Bicyclo[3.2.1]oct-6-ene Framework
Authors: Seki Katsura , Kiyokawa Wakako , Hashimoto Hiroki , Uyehara Tadao , Ueno Masako , Sato Toshio
Published: March 2006

Treatment of 2-vinylbicyclo[3.2.1]oct-6-en-2-ols with KH in toluene gave mainly [5-5] fused-ring compounds through a [1,3] sigmatropic shift.
Trifluoromethyl-substituted Photochromic Indolylfulgide. A Remarkably Durable Fulgide towards Photochemical and Thermal Treatments
Authors: Yokoyama Yasushi , Takahashi Kazuyuki
Published: March 2006

An indolylfulgide having a 1-(1,2-dimethyl-3-indolyl)-2,2,2-trifluoroethylidene group on the succinic anhydride showed an excellent resistivity towards the repetition of photochromic transformation between the photostationary states of UV- and visible-light irradiation both in toluene and in a PMMA film under the atmospheric environment. The colored form also showed the remarkable thermal stability.
A Facile Preparation of Polysiloxane Containing Tributyltin Group as Efficient Protection Group
Authors: Iida Takahisa , Sekiya Tomohiro , Kageyama Toshifumi , Sugizaki Toshio , Moriya Osamu
Published: March 2006

The polysiloxane having tributyltin groups, which showed a blocking effect from self-condensation to give silica gel, was prepared from the reaction of water glass and bis(tributyltin) oxide in the presence of methansulfonic acid. The molar ratios of Si/Sn in the obtained polysiloxanes were estimated by gravimetric analysis to be in the range of 2 to 3.
Synthesis of Silica Gel Containing Dibutyltin Group from Sodium Metasilicate and Dibutyltin Compound
Authors: Nagaei Takashi , Akiike Kunio , Kageyama Toshifumi , Yatabe Jun , Moriya Osamu
Published: March 2006

Silica gel 1 containing dibutyltin group was readily obtained from the reaction of sodium metasilicate and dibutyltin compounds. The obtained gel 1 was consisted of an almost equimolecular ratio of Si and Sn unit according to the initial feed ratio of the monomers. Dibutyltin groups in the gel 1 were readily removed by treatment with an aqueous inorganic acid.
Absorption Spectra of Rhodamine 6G by Slab Optical Waveguide Spectroscopy
Authors: Matsuda Naoki , Takatsu Akiko , Kato Kenji
Published: March 2006

Slab optical waveguide (SOWG) was employed for obtaining absorption spectra of rhodamine 6G (Rh6G) with the concentration of 1 μmol/dm3. It was found that Rh6G existed as a monomer and dimer on SOWG surfaces. On the SOWG surfaces treated with octadecylsilane only the band assigned to a monomer of Rh6G was observed.
Interaction of Synthetic J Protein of Bacteriophage φK with Its Circular Single-Stranded DNA
Authors: Ono Shin , Okada Takayuki , Aimoto Saburo , Fujii Takayoshi , Morita Hiroyuki , Shimasaki Choichiro , Yoshimura Toshiaki
Published: March 2006

The interaction of the chemically synthesized DNA-binding protein J (SynJ) of bacteriophage φK with its single stranded circular φK DNA (css-DNA) was examined by circular dichroism and fluorescence methods. A strong cooperative binding between the synJ and the css-DNA was observed in 20 mmol dm−3 Tris-HCl buffer (pH 7.3) with 200 mM NaCl. While an electrostatic simple binding was observed in the buffer without NaCl.
Kinetic Determination of Organic Vapor Mixtures with Single Piezoelectric Quartz Crystal Sensor Using Artificial Neural Networks and Partial Least Squares
Authors: Xing Wan-Li , He Xi-Wen
Published: March 2006

A single piezoelectric quartz crystal coated with one kind of crown ether was applied to the simultaneous determination of acid and amine vapor mixtures. From the adsorption and desorption curves of analytes, which had somewhat differences in shape, frequency shifts from ten time windows were taken as inputs for two chemometric methods, partial least squares (PLS) and artificial neural networks (ANN). The results showed that the perdiction was better for artificial neural networks in both sample sets.
Efficient Detection of Membrane-Bound Nucleic Acids Using New Fluorescein Derivative
Authors: Fujita Satoshi , Kagiyama Naoto , Momiyama Masayoshi , Toru Takeshi
Published: March 2006

A number of fluorescein derivatives were synthesized and their fluorescent properties were studied. Phosphates of the fluorescein derivatives were tested for the alkaline phosphatase-linked fluorescence assay of membrane-bound DNA and were found to give high resolution for detection of DNA, in which DNA was detectable to the amount of 5 fg in the spot test and 0.1 pg in Southern blot hybridization.
Dielectric Medium Effects on Absorption Maxima of Protonated Retinylidene Schiff Bases as Models of Rhodopsin
Authors: Houjou Hirohiko , Sakurai Minoru , Inoue Yoshio
Published: March 2006

Dielectric medium effects on absorption maxima of protonated retinal Schiff bases (PSB) are studied using a reaction field theory incorporated into the INDO/S method. The calculation shows that a counterion, such as carboxylate, has no explicit role in regulating the absorption maximum of PSB even in a low dielectric medium.
Facile Synthesis of the 1,3-Disilacyclohexane Ring
Authors: Mizuno Katsuya , Inamasu Naoko , Shimizu Masaki , Hiyama Tamejiro
Published: March 2006

A new method for the synthesis of the 1,3-disilacyclohexane skeleton is established involving silylation of a dithioacetal followed by ring closure with a base. The spiro-fused disilacyclohexane ring is shown to be structurally strain-free, like cyclohexane, on the basis of its X-ray analysis. The reaction mechanism involving a silacyclopropane intermediate is proposed.
Novel Pd(0)-Catalyzed Cyclization-Carbonylation of 2-Methyl-1-vinyl-5,6-heptadienyl Acetate : The Synthesis of (±)-Isoiridomyrmecin
Authors: Doi Takayuki , Yanagisawa Arata , Yamamoto Keiji , Takahashi Takashi
Published: March 2006

The Pd(0)-catalyzed cyclization-carbonylation of 2-methyl-1-vinyl-5,6-heptadienyl acetate regio- and stereoselectively gave an α-cyclopentylacrylic acid derivative which was applied to the sythesis of (±)-isoiridomyrmecin.
Photochemistry of 2-(Methoxycarbonyl)phenyl Azide in Solution at Room Temperature: A Time-resolved Infrared Study
Authors: Sun Xue-Zhong , Virrels Ian G , George Michael W , Tomioka Hideo
Published: March 2006

Time-resolved infrared studies of intermediates generated by photolysis of the title azide in solution at room temperature demonstrated that 3-(methoxycarbonyl)azacycloheptatetraene was the sole intermediate at least in the μs time scale, which is in sharp contrast with that observed in the photolysis in argon matrix at 10 K. Substituent effects on the reactivity of the dehydroazepine toward diethylamine are also discussed.
Preparation of Novel Heterocycles by Dimeric Alkylation of 2-Thiouracils and Formation of Complexes with Copper and Silvar Ions
Authors: Itahara Toshio
Published: March 2006

Dimeric Alkylation of 2-thiouracils with dihalomethanes and α,α′-dibromoxylenes gave novel heterocycles which were treated with copper(II) and silver(I) compounds to result in formation of complexes.
Flavin-Mediated Two-Way Bioelectrocatalysis of Lactate Dehydrogenase Reaction Combined with Diaphorase Reaction
Authors: Takagi Kazuyoshi , Kano Kenji , Ikeda Tokuji
Published: March 2006

FMN(H2) has been found to work as a two-way mediator of diaphorase to reduce NAD+ as well as to oxidize NADH. The FMN/diaphorase/NAD system has been successfully combined with lactate dehydrogenase-catalyzed reduction of pyruvate and oxidation of lactate. The thermodynamics of the two-way bioelectrocatalytic system is described.
Mechanism of Electron Transfer Oxidation of 4-Substituted 1-Benzyl-1,4-dihydronicotinamides
Authors: Takada Naoki , Itoh Shinobu , Fukuzumi Shunichi
Published: March 2006

Electron transfer oxidation of variously 4-substituted 1-benzyl-1,4-dihydronicotinamides (RBNAH) by [Fe(phen)3]3+ (phen = 1,10-phenanthroline) results in formation of RBNAH•+, followed by cleavage of the C(4)-H or C(4)-C bond of RBNAH•+ depending on the substituent R. In particular, the C(4)-C bond cleavage of t-BuBNAH•+ yields exclusively BNA+ and tert-butylradical (t-Bu•) which is detected by applying a rapid mixing flow electron spin resonance (ESR) technique.
Formation of Mutagenic Nitrofluoranthenes in the Gas-Solid Heterogeneous Reaction of Particle-associated Fluoranthene in NO2-O3-O2 System
Authors: Inazu Koji , Kobayashi Takaaki , Hisamatsu Yoshiharu
Published: March 2006

In the gas-solid heterogeneous reactions of particle-supported fluoranthene with ppm levels of nitrogen dioxide and ozone, dinitrofluoranthenes and 3-nitrofluoranthene (3-NF) were formed only in the dark and 2-NF was formed only under photoirradiation while 1-, 7-, and 8-NFs were formed under both conditions. Yield and distribution of the products varied depending on the kind of supports employed.
Influence of Starting Solution in Preparation of V2O5/TiO2 Catalysts for Selective Oxidation of Benzene
Authors: Satsuma Atsushi , Takenaka Sakae , Tanaka Tsunehiro , Nojima Shigeru , Kera Yoshiya , Miyata Hisashi
Published: March 2006

The selectivity in benzene oxidation over V2O5/TiO2(rutile) was drastically changed with starting solutions in the preparation of catalysts, although V2O5/TiO2(rutile) prepared from oxalic acid solution of NH4VO3 selectively oxidized benzene to maleic anhydride, only a total oxidation proceeded over those prepared without oxalic acid.
A Synthesis of (E)-(1-Organo-1-alkenyl)boronates by the Palladium-Catalyzed Cross-Coupling Reaction of (E)-1,2-Bis(boryl)-1-alkenes with Organic Halides: A Formal Carboboration of Alkynes via the Diboration-Coupling Sequence
Authors: Ishiyama Tatsuo , Yamamoto Masafumi , Miyaura Norio
Published: March 2006

(E)-1,2-Bis(boryl)-1-hexene, prepared by the platinum-catalyzed diboration of 1-hexyne with bis(pinacolato)diboron, regioselectively cross-coupled with aryl, 1-alkenyl, benzyl, and allyl halides in the presence of a palladium catalyst and a base to provide the corresponding pinacol esters of (E)-(1-butyl-1-alkenyl)boronic acid in good yields.
Selective Oxidative Dehydrogenation of Ethane Catalyzed by Cs2.5Mn0.08H1.34PVMo11O40 Catalyst Precursor
Authors: Mizuno Noritaka , Han Wonchull , Kudo Tetsuichi
Published: March 2006

Cs+-, V5+-, and Mn2+-addition to H3PMo12O40 efficiently increased the catalytic activity and selectivity to ethene for the title reaction. The yield of ethene for Cs2.5Mn0.08H1.34PVMo11O40 catalyst was 2.0% at 350 °C and reached 4.3% at 425 °C.
Synthesis of the Anthraquinone Part of Dynemicin A via Diels-Alder Reaction
Authors: Nishikawa Toshio , Moku Masatoshi , Suzuki Yoko , Isobe Minoru
Published: March 2006

The anthraquinone moiety of dynemicin A was synthesized by Diels-Alder reaction between bromonaphthoquinone and a novel diene having the D ring and aromatization as key steps.
Persilylated Dimethylenecyclobutene Dianion Dilithium as the First 6C-8π Allyl Anion System
Authors: Sekiguchi Akira , Matsuo Tsukasa , Ebata Keisuke , Sakurai Hideki
Published: March 2006

Reduction of persilylated dimethylenecyclobutene with lithium metal in 1,2-dimethoxyethane yields green crystals of persilylated dimethylenecyclobutene dianion dilithium as the first 6C-8π allyl anion system. The molecular structure, determined by X-ray crystallography, is discussed in comparison to that of the neutral starting molecule.
Solid Electrolyte-Based NOx Sensor Using Auxiliary Phase of Metal Oxide
Authors: Shimizu Youichi , Maeda Koji
Published: March 2006

Solid electrolyte-based electrochemical elements fabricated with sodium super-ionic conductor (NASICON) and auxiliary phases of metal oxides were tested for the detection of NO and NO2 in the range between 10 and 200 ppm. The elements having Cr2O3/NASICON and CuO/NASICON combinations exhibited rather good performance for potentiometric sensing of NO as well as NO2 at 250 °C.
Ag+-Selective Bisaminimides Possessing Oligo(oxyethylene) Linkages
Authors: Inokuma Seiichi , Satoh Hiroko , Yasuda Toshiaki , Nishioka Seijin , Nishimura Jun
Published: March 2006

Lipophilic aromatic bisaminimides with three or five ethereal oxygens in the linkages were prepared. The structural effects of the aminimides on the extraction abilities were examined for some heavy metal nitrates in the liquid-liquid systems. The bisaminimides other than p-isomer showed Ag+-selectivity, and the percent extraction of o-isomers about two times larger than that of m-isomers.
Singlet-Triplet Energy Gaps of Quinonoidal Dinitrenes
Authors: Nimura Shigeaki , Kikuchi Osamu , Ohana Tsuguyori , Yabe Akira , Kaise Masahiro
Published: March 2006

Singlet-triplet energy gaps of phenylene-1,4-dinitrene (1), biphenyl-4,4′-dinitrene (2), stilbene-4,4′-dinitrene (3), and azobenzene-4,4′-dinitrene (4) were determined from temperature dependence of ESR signal intensities. These quinonoidal dinitrenes show interesting features: (1) the energy gap of 1 is comparable to that of 2, and (2) the gap of 4 is almost one-half of the gap of 3. The results are qualitatively explained by magnitudes of polarized π spins.
Structure and Catalysis of a SiO2-Supported Gold-Platinum Cluster [(PPh3)Pt(PPh3Au)6](NO3)2
Authors: Yuan Youzhu , Asakura Kiyotaka , Wan Huilin , Tsai Khirui , Iwasawa Yasuhiro
Published: March 2006

A novel catalyst of [(PPh3)Pt(AuPPh3)6](NO3)2  1 supported on SiO2 was very active in H2-D2 equilibration with a TOF of 29.8 s−1, while it showed low activity for ethene hydrogenation and CO oxidation at 303 K. It was found that the catalysis of 1/SiO2 was not caused by platinum particle impurity but by the platinum atom which bound to the gold atoms in the cluster. The cluster framework of 1/SiO2 was stable during the reactions at 303 K. The change of Au-Pt bond in 1/SiO2 by heat treatment and the catalytic performance of produced cluster fragments were characterized by EXAFS, FT-IR and kinetic investigation.
Anomalous Melt Condensation Behavior of Pure Isomers of Protocatechuic Acid Derivatives
Authors: Saito Kiyoshi , Noguchi Motomi , Takahashi Kentaro , Utaka Kojun , Yamamoto Shin-ichi , Hasegawa Masaki
Published: March 2006

Separation of a mixture of regio isomers of 6- and 7-carboxy-2-hydroxymethyl-1,4-benzodioxane (1) was successfully carried out by the fractional crystallization of their acetyl derivatives. Pure 1a (or 1b) gave an infusible product upon heating at 280 °C for 90 (or 30) min under reduced pressure, while a mixture of the regio isomers 1a and 1b polymerized to yield a high-molecular-weight spinnable polyester under the same conditions.
Photochromism of 4-Hexadecyl-4′-methoxysalicylideneaniline in Polycarbonate: Kinetic Study on the Thermal Decoloration in Heterogeneous Matrix
Authors: Yin Ming , Kuwabara Tetsuo , Nanasawa Masato
Published: March 2006

A multi-process model consisting of a distribution of rate constant of each process was proposed to explain the thermal decoloration of the colored species of 4-hexadecyl-4′-methoxysalicylideneaniline in polycarbonate matrix. The kinetic equation deduced from this model indicates that the lifetime of the colored species linearly increases with time for the decoloration in heterogeneous matrix.
Fluorescence Energy Transfer to Tailed Acridine Oranges from Pyrene Excimer Formed in Four α-Helix Bundle 53-Peptide
Authors: Tanaka Yuji , Akisada Hideo , Fujimoto Tsutomu , Nishino Norikazu
Published: March 2006

Fluorescence energy transfer from pyrene excimer in four α-helix bundle polypeptide to 10-n-alkyl acridine oranges was alkyl chain-length-dependent. The hydrophobic space in the bundle structure could accommodate as long alkyl chain as decyl by 1:1 stoichiometry.
Three-Dimensional pH Microprobing with an Optically-Manipulated Fluorescent Particle
Authors: Sasaki Keiji , Shi Zhong-You , Kopelman Raoul , Masuhara Hiroshi
Published: March 2006

A novel pH microprobe has been developed, which makes it possible to measure inhomogeneous pH distributions with submicrometer three-dimensional resolution. A polyacrylamide particle incorporated with pH-sensitive fluorescein-acrylamide is manipulated with a laser trapping technique. It is demonstrated that the local pH in a water/glass interface is different from that of bulk water.
Synthesis and Properties of Dioxa[3.3](3,6)carbazolophane
Authors: Tani Keita , Tohda Yasuo , Hisada Kenji , Yamamoto Masahide
Published: March 2006

Dioxa[3.3](3,6)carbazolophane 1 has been synthesized by the cyclization reaction between 3,6-bis(hydroxymethyl)carbazole and corresponding dibromide. The transannular π-π electronic properties of 1 in solution were examined by absorption and emission spectra. The structure of 1 was confirmed by X-ray crystal analysis.
Syntheses and Structures of Novel Optically Active Dinuclear Copper(II) Complexes of Structurally Reinforced Macrocyclic Polyamines
Authors: Seki Yoshio , Miyake Hiroyuki , Kojima Yoshitane
Published: March 2006

Optically active μ-chloro and μ-hydroxo dinuclear copper(II) complexes of structurally reinforced chiral 18-membered azamacrocycle (2S,8S,11S,17S)-2,8,11,17-tetraisobutyl-1,4,7,10,13,16-hexaazatricyclo[14. 2. 2. 27,10]docosane and 20-membered one (2S,9S,12S,19S)-2,9,12,19-tetraisobutyl-1,4,8,l1,14,18-hexaazatricyclo [16. 2. 2. 28,11] tetracosane obtained by BH3 reduction from structurally constrained macrocyclic pseudopeptides were newly synthesized and characterized.
Nucleophilicity of (Oxodimethylenemethane)-palladium and -platinum Complexes and Derivatization to π-Allyl Complexes with Ester and Ether Functionality at 2-Position
Authors: Ohsuka Akihiro , Hirao Toshikazu , Kurosawa Hideo , Ikeda Isao
Published: March 2006

A novel kind of 2-oxy-substituted π-allyl palladium complexes as well as platinum complexes were synthesized by the reaction of the corresponding oxodimethylene-methane complexes with electrophiles such as acid halides and some organic halides. From these reactions, the correlation between electronic structure and nucleophilicity of the oxodimethylenemethane complexes was disclosed.
125Te NMR Evidence for the Existence of Trinuclear Tellurate Ion in Aqueous Solution
Authors: Inamo Masahiko
Published: March 2006

Deprotonation equilibria of telluric acid in aqueous solution were studied by the 125Te NMR technique, and the presence of the tellurate ion that contains three Te nuclei was clearly shown by the coupling pattern of the NMR spectra of both natural and 125Te-enriched telluric acids.
The Most Stable Methylcation. Tris(6-methoxy-1-azulenyl)methyl Hexafluorophosphate
Authors: Ito Shunji , Kikuchi Shigeru , Morita Noboru , Asao Toyonobu
Published: March 2006

Extremely stable carbocations, tris(6-methoxy-1-azulenyl)methyl, bis(6-methoxy-1-azulenyl)(4-methoxyphenyl)methyl, and (6-methoxy-1-azulenyl)bis(4-methoxyphenyl)methyl cations were prepared and their pKR+ values were determined spectrophotometrically as >14.0, >14.0, and 13.2, respectively. The extreme stability of these methyl cations are attributable to dipolar structures of azulene rings in addition to the contribution of mesomeric effect of three methoxy groups.
A Convenient Synthesis of α-Alkoxycarbonyl-α,β-unsaturated Trifluoromethyl Ketones
Authors: Katsuyama Isamu , Funabiki Kazumasa , Matsui Masaki , Muramatsu Hiroshige , Shibata Katsuyoshi
Published: March 2006

α-Alkoxycarbonyl-α,β-unsaturated trifluoromethyl ketones are easily prepared by Knoevenagel condensation of aldehydes with trifluoroacetoacetates in the presence of silica gel functionalized with amino groups and p-toluenesulfonic acid. The method gives the products in moderate to good yields.
Catalytic Oxidation of α-Carbon of Ethers Utilizing Binuclear Copper(II) Complex of 7-Azaindole
Authors: Minakata Satoshi , Imai Eiichiroh , Ohshima Yasuhito , Inaki Kanako , Ryu Ilhyong , Komatsu Mitsuo , Ohshiro Yoshiki
Published: March 2006

Treatment of benzyl ethyl ether with a catalytic amount of binuclear copper(II) complex of 7-azaindole 1 under oxygen atmosphere at 80 °C produced ethyl benzoate in 10400% yield based on the catalyst. This reaction could be also applied to other ethers (e.g., alkyl benzyl ethers and dialkyl ethers) to give α-oxygenated products catalytically.
A Chain Complex of Ruthenium(II,III) Cation Dimer Linked by a Nitroxide Radical, [Ru2(O2CCMe3)4(NITPh)n(BF4)n (NITPh = 2-Phenyl-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazolyl-1-oxy-3-oxide)
Authors: Handa Makoto , Sayama Yasuyoshi , Mikuriya Masahiro , Nukada Ryoji , Hiromitsu Ichiro , Kasuga Kuninobu
Published: March 2006

A chain complex of ruthenium(II,III) cation dimer linked by the nitroxide radical, [Ru2(O2CCMe3)4(NITPh)]n(BF4)n (NITPh = 2-phenyl-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazolyl-1-oxy-3-oxide) has been prepared and characterized. The structure with the alternated alignment of S = 3/2 (Ru(II,III) core) and S = 1/2 (NITPh) has been confirmed by the X-ray crystal analysis. The magnetic moment decreases monotonously with decrease of temperature.
The First Example of Enantioselective Protonation of Prochiral Enolates with Chiral γ-Hydroxyselenoxides
Authors: Takahashi Tamiko , Nakao Naoki , Koizumi Toru
Published: March 2006

Enantioselective protonation of a simple enolate has been developed using an optically pure γ-hydroxyselenoxide 1 as a chiral proton source. Reaction of zinc bromide enolate 7b with (SSe)-selenoxide (SSe)-1c gave (S)-2-benzylcyclohexanone (S)-8 with high enantioselectivity. Intramolecular hydrogen bonding between hydroxy group and seleninyl-oxygen of 1 would contribute to this asymmetric induction.
Photoluminescence Characteristics of Calcined Silica Gels Containing Carbonized Intermediates
Authors: Yamada Nobusuke , Sano Masahito , Yoshimura Susumu
Published: March 2006

Photoluminescence was observed from the carbonization intermediates of acenaphthylene or 2-methyl-1,2′-naphthyl ketone in silica gels by an excitation wavelength of 337 nm. As the calcination temperature incresed from 500 to 1000 °C, the spectral line shape exhibiting two regions of maxima centered at 390 and 490 nm changed systematically. No photoluminescence was seen from the samples without calcination, nor from a clear gel calcined over 1050 °C. SEM observations indicate uniform mixing of the intermediates in the silica matrix down to a few tens of nanometers.
Study of Bamford-Stevens Reaction on α-Oxy Tosylhydrazones
Authors: Chandrasekhar Srivari , Mohapatra Suchismita , Lakshman Samala
Published: March 2006

Exposure of tosylhydrazones of α-oxy carbonyl compounds obtainable from carbohydrates and tartaric acid furnishes exocylic vinylic ethers.
Chemiluminescent Characters of Hydroperoxide and Dioxetanone of Coelenterate Luciferin Analog Prepared by Low-Temperature Photooxygenation
Authors: Usami Ken , Isobe Minoru
Published: March 2006

Chemiluminescent characters of 2-hydroperoxide 2 and 1,2-dioxetanone 6 of coelenterate luciferin analog 1 prepared by low-temperature photooxygenation are described. Direct luminescence by thermal decomposition of 2 or 6 was independently observed, suggesting that the former emitted light as anionic amide 4, on the other hand, the latter as neutral one 7.
Formation of Ketones from Alkyl Nitrites in the Solid State
Authors: Kinbara Kazushi , Takezaki Hiroshi , Kai Akiyoshi , Saigo Kazuhiko
Published: March 2006

Alkyl nitrites selectively afforded the corresponding ketones upon photoirradiation in the solid state. It was suggested by the X-ray crystallographic analysis that the cavity in crystal and the initial conformation of the nitroso group had an influence on the yield of the ketones.
Surface Organometallic Chemistry of Tin: Grafting Reactions on Highly Dehydroxylated Silica
Authors: Adachi Mariko , Lefebvre Frédéric , Basset Jean-Marie
Published: March 2006

A new grafting method of organotin complexes with the surface of highly dehydroxylated silica is reported. Characterisation was achieved by surface microanalysis, in situ IR, solid state 13C CP-MAS and 119Sn MAS NMR. Bu3Sn-O-SnBu3 reacts with the strained siloxanes and opens these bridges at room temperature. The reaction occurs also with the remaining hydroxyl groups and with less strained siloxane bridges, leading in all cases to the same surface organometallic fragment ≡Si-O-SnBu3.
New and Effective Synthesis of 7-Triethylsilylbaccatin III from 7β,13α-Bistriethylsiloxy-1β,2α,10β-trihydroxy-9-oxo-4(20),11-taxadiene
Authors: Shiina Isamu , Saitoh Masahiro , Nishimura Koji , Saitoh Katsuyuki , Mukaiyama Teruaki
Published: March 2006

7β,13α-Bistriethylsiloxy-1β,2α,10β-trihydroxy-9-oxo-4(20),11-taxadiene (2), derived from 10-deacetylbaccatin III via degradation of oxetane ring, was conveniently converted into 7-triethylsilylbaccatin III (1) by way of a new and effective method for constructing oxetane ring. Thus, the synthesis of a precursor of taxol from novel taxoid 2 was accomplished.
Direct Condensation Polymerization of l-Lactic Acid Catalyzed by Distannoxane
Authors: Otera Junzo , Kawada Kazuko , Yano Toru
Published: March 2006

1,3-Disubstituted tetrabutyldistannoxanes effectively catalyze direct condensation polymerization of water-containing l-lactic acid to afford a high-molecular-weight polymer.
Structure-sensitivity of the Dynamics of CO Oxidation on Pd(111), Pd(110) and Polycrystalline Pd Surfaces: Infrared Chemiluminescence Study of the Product CO2
Authors: Uetsuka Hiroshi , Watanabe Koji , Ohnuma Hisashi , Kunimori Kimio
Published: March 2006

The infrared chemiluminescence technique has been applied to the catalytic oxidation of CO on Pd(111), Pd(110) and polycrystalline Pd surfaces. The product CO2 molecules were vibrationally and rotationally excited in all cases. However, the vibrational energy states of CO2 were different among these three surfaces. This result means that the structure of the activated CO2 complex (i.e., the dynamics of CO oxidation) depends on the surface structures. In addition, the steady-state reaction rates of CO oxidation as a function of surface temperature were also different among the Pd surfaces. These results show that the CO oxidation on Pd is structure-sensitive not only in the kinetics but also in the dynamics.
An Unexpected Route to Fluorinated Anisoles
Authors: Takechi Naoto , Fukai Yasushi , Oka Kazuyoshi , Huisgen Rolf
Published: March 2006

We found a new one-pot procedure for the synthesis of polyfluoroanisoles from polyfluoroanilines. The reaction involves aromatic nucleophilic substitution of o- or p-fluorine of benzenediazonium salt with mathoxy group followed by reductive removal of the diazonium group.
Hydrozirconation of Allenyl Sulfide for Generating γ-Thio-substituted Allylzirconium Species and Its Reaction with Carbonyl Compounds
Authors: Chino Masao , Liang Guang Hao , Matsumoto Takashi , Suzuki Keisuke
Published: March 2006

Hydrozirconation of allenyl sulfide generates a γ-thio-allylzirconocene species, which reacts with aldehydes and ketones to give anti olefinic β-sulfenyl alcohols in highly regio- and stereoselective manner.
Biocatalytic Preparation of (R)-(−)-4-(Phenylthio)-2-butanol and (R)-(−)-4-(Phenylsulfonyl)-2-butanol by the Sequential Use of Pichia farinosa and Rhodococcus rhodochrous
Authors: Sugai Takeshi , Ohtsuka Yoshikazu , Ohta Hiromichi
Published: March 2006

Preparation of (R)-4-(phenylthio)-2-butanol and (R)-4-(phenylsulfonyl)-2-butanol has been established based on the sequential use of two biocatalysts. A Pichia farinosa IAM 4682 mediated reduction of 4-(phenylthio)-2-butanone afforded (R)-4-(phenylthio)-2-butanol (91%e.e.) in 90% yield. Contaminating (S)-enantiomer in the resulting product was selectively oxidized by Rhodococcus rhodochrous IFO15564 to leave pure (R)-enantiomer in 87% yield. From this product, highly enantiomerically pure (R)-4-(phenylsulfonyl)-2-butanol was obtained by hydrogen peroxide oxidation.
Two New Cembrane-type Diterpenoids from Okinawan Soft Coral of the Genus, Sarcophyton
Authors: Miyaoka Hiroaki , Taira Shouta , Mitome Hidemichi , Iguchi Kazuo , Matsumoto Keita , Yokoo Chihiro , Yamada Yasuji
Published: March 2006

Two new cembrane-type diterpenoids, sarcodiol (1) and 3,4-epoxysarcophytonin (4), were isolated from Okinawan soft coral of the genus, Sarcophyton. Their structures were determined from spectroscopic measurements, X-ray analysis and chemical reaction.
Molecular Structure of 1,3-Disubstituted π-Allyl Palladium(II) Complexes with a Chiral Diphosphine: The Intermediate of Palladium-catalyzed Asymmetric Allylic Alkylation
Authors: Yamaguchi Motowo , Yabuki Masayuki , Yamagishi Takamichi , Sakai Ken , Tsubomura Taro
Published: March 2006

Structural studies by X-ray analysis and NMR spectroscopy of the π-allyl complex, [Pd(η3-1,3-diphenylallyl)((S)-BINAP)]PF6·AcOEt, have been carried out, and revealed the stereochemical feature for the intermediate of palladium-catalyzed asymmetric allylic alkylation. The dissimilarity of the two phenyl groups attached to the π-allyl moiety is assumed to be one of the origin of the selectivity. In solution two configurational isomers, (syn, syn) and (syn, anti), exist.
Triple -Decker Trinuclear Porphinatoruthenium(II) Complexes Bridged with Pyrazine or 4,4′-Bipyridine-Preparation and Electrochemical Oxidation
Authors: Endo Akira , Tagami Uno , Wada Yukari , Saito Miki , Shimizu Kunio , Satô Gen P
Published: March 2006

Two triple-decker trinuclear porphinatoruthenium(II) complexes bridged with pyrazine (pyr) or 4,4′-bipyridine (4,4′-bpy), [{(CO)(oep)RuII}(μ-pyr){RuII(oep)}(μ-pyr){RuII(oep)(CO)}] (H2oep = octaethylporphine) and [{(CO)(tpp)RuII}(μ-4,4′-bpy){RuII(tpp)}(μ-4,4′-bpy){RuII(tpp)(CO)}] (H2tpp = tetraphenylporphine), have been prepared. The first trinuclear complex was electrochemically oxidized in four steps.
Oxidative Decarboxycondensation of Pyruvic Acid to Citraconic Anhydride
Authors: Ai Mamoru , Ohdan Kyoji
Published: March 2006

Citraconic anhydride (Methyl maleic anhydride) was found to be produced from pyruvic acid by an oxidative decarboxy condensation. The presence of oxygen is required to promote the reaction. The best catalyst is iron phosphate with a P/Fe atomic ratio of 1.2 and the optimum temperature is about 200 °C. The one-pass yield reaches 71 mol% at a pyruvic acid conversion of 98%. The main side-reaction is the formation of acetic acid and CO2 by oxidative C–C bond fission.
Rhodium-Catalyzed Carbonylation of 2-Alkynylbenzaldehyde under Water-Gas Shift Reaction Conditions: Formation of Novel Tricyclic Lactones
Authors: Sugioka Takashi , Zhang Shi-Wei , Morii Noritsugu , Joh Takashi , Takahashi Shigetoshi
Published: March 2006

Rhodium complexes catalyze carbonylation of 2-alkynylbenzaldehyde 1 under water-gas shift reaction conditions to give novel lactone 2 as a major product (up to 59% yield), the structure of which is a tricyclic ring system.
Layer-by-Layer Assembly of Aqueous Bilayer Membranes on Charged Surfaces
Authors: Ichinose Izumi , Fujiyoshi Kunitaka , Mizuki Suguru , Lvov Yuri , Kunitake Toyoki
Published: March 2006

Multilayer films of cationic bilayer membranes were prepared by means of alternate electrostatic adsorption with sodium poly(styrenesulfonate). Linear film growth was observed for at least 30 layers, as monitored by UV spectroscopy and quartz crystal microbalance (QCM). A regular multilayer film of cationic bilayer membrane with anionic bilayer membrane was similarly prepared.
Synthesis and Structure of a Novel 1,1′-Ferrocenediyldiplatinum Complex Having μ3(2S,N)-NCS Ligands
Authors: Onitsuka Kiyotaka , Yoshida Toshiya , Ozawa Fumiyuki , Sonogashira Kenkichi
Published: March 2006

The treatment of 1,1′-ferrocenediyldiplatinum complex {C5H4Pt(cod)NCS}2Fe (1) with 2 equivalents of PAr3 results in the formation of a novel dimeric μ3(2S,N)-NCS complex (2), of which structure has been determined by an X-ray diffraction analysis. Reaction of 1 with MeSSMe in the presence of triphenylphosphine gave a μ-thiolato complex (3).
Selective Electrochemical Dehalogenation of 2,4-Dichlorophenoxyacetic Acid in MeCN at Room Temperature
Authors: Tsyganok Andrey , Otsuka Kiyoshi , Yamanaka Ichiro , Plekhanov Vasilii , Kulikov Sergei
Published: March 2006

2,4-Dichlorophenoxyacetic acid (commercial pesticide 2,4-D) can be dechlorinated by electrochemical reduction at different carbon materials under mild conditions to give phenoxyacetic acid with 80% selectivity at 75% conversion of 2,4-D (current efficiency 10∼14%).
Effect of Butylation on Hydropyrolysis of Coal
Authors: Yoneyama Yoshiharu , Ando Shigehiro , Hamajima Keishi , Hagino Takaaki , Kato Tsutomu
Published: March 2006

Effect of introduction of butyl group into Yubari coal on hydropyrolysis was investigated. The strong promoting effect of butyl group on gasification of coal was observed at considerably low temperature, 500 °C: The yield of gas increased from 29 wt% of Yubari coal to 82 wt% of butylated Yubari coal.
The Influence of Serine Residue on the Poly(Ser-co-Lys) in HFIP / Water Solutions
Authors: Uchida Chieko , Wakamatsu Kaori , Oya Masanao
Published: March 2006

The conformational transition of poly(Ser:22-co-Lys:78) was studied in a mixed solution of 1,1,1,3,3,3,-hexafluoroisopropanol (HFIP) and water by circular dichroism (CD) spectroscopy. The structure of this polymer was α-helix in 100% HFIP solution and random coil in 100% water. The conformational transition was observed in 50 / 50 (HFIP : water).
First Synthesis of Selenophene 1,1-Dioxides
Authors: Nakayama Juzo , Matsui Tomoki , Sugihara Yoshiaki , Ishii Akihiko , Kumakura Shigekazu
Published: March 2006

Oxidation of four tetraarylselenophenes, 2,5-dimethyl-3,4-diphenylselenophene, 2,4-di-t-butylselenophene, and benzo[b]selenophene with dimethyldioxirane produces the corresponding selenophene 1,1-dioxides in high yields.
Enhanced Phenol Yield from Radiation-induced Decomposition of Chlorophenols in Deaerated Water by Addition of Cyclodextrin and Glucose
Authors: Huang Xixian , Arai Hidehiko , Matsuhasi Shinpei , Miyata Teijiro
Published: March 2006

The yield of phenol, identified as the main product, was enhanced remarkably by addition of cyclodextrins (CDs) and glucose. The effect was found to increase with cavity dimensions. It was suggested that inclusion accelerates hydrogen atom abstraction by the incorporated intermediate radicals.
Enhancement of Tolerance to the Humidity by Chemical Vapor Deposition of Silicon Alkoxide on Pd-Mordenite Catalyst in the Reaction of NO, Methane and Oxygen
Authors: Suzuki Masaki , Niwa Miki
Published: March 2006

In order to enhance the tolerance of Pd loaded on zeolite catalyst to the humidity, chemical vapor deposition of silicon alkoxide has been studied in the reduction of NO by methane in the presence of oxygen. The suppression of activity by the added water vapor was able to be reduced or almost disregarded by the deposition of silica.
Promotion Effect of Polymer-Immobilized Neodymium Ions on Catalytic Activity of Ultrafine Palladium Particles
Authors: Teranishi Toshiharu , Nakata Ken , Miyake Mikio , Toshima Naoki
Published: March 2006

Neodymium ions, which are placed close to ultrafine palladium particles by immobilization on water-soluble polymers, did promote the catalytic activity of the palladium particles for hydrogenation of acrylic acid. The acrylic acid is considered to be concentrated around ultrafine palladium particles by coordinating to neodymium ions bound to the protecting polymer.
Formation of High Rydberg He(np 3P: n = 5–12) Atoms by the Three-Body Collisional-Radiative Recombination of He+ in the Helium Flowing Afterglow
Authors: Nakamura Masafumi , Tsuji Masaharu , Tanaka Makoto , Nishimura Yukio
Published: March 2006

The He(np 3P → 2s 3S) emission lines from n = 5–12 have been observed in a He flowing afterglow. A comparison of the He-pressure dependence of the emission intensity with those predicted from the two-body [He+][e−] and three-body [He+][e−][He] and [He+][e−][e−] recombination processes indicated that the high Rydberg He(np 3P: n = 5–12) states are produced from the last three-body collisional-radiative (CR) recombination reaction.
Sulfur Containing Plasma Treatment for the Introduction of Thiol Groups onto Polyethylene Surfaces
Authors: Muguruma Hitoshi , Karube Isao , Saito Masao
Published: March 2006

We propose a novel method of introducing thiol groups onto polymer surfaces of e.g. polyethylene by plasma treatment with sulfur-containing organic compounds. X-ray photoelectron spectroscopic analyses of the plasma treated surfaces are presented.
Convenient Method for One-pot Preparation of 1,2-Diamines from Nitroolefins
Authors: Imagawa Kiyomi , Hata Eiichiro , Yamada Tohru , Mukaiyama Teruaki
Published: March 2006

Convenient method for preparation of 1,2-diamine from the corresponding nitroolefin was established by successive reactions of Michael addition of O-ethylhydroxylamine to nitroolefin and reduction with hydrogen. The present preparative method was applicable to various nitroolefins by one-pot procedure.