bluuebunny/crossref_metadata_2025 huggingface dataset:
Photoinduced Electron Transfer Reaction of 3,3-Dimethyl-3H-pyrazoles: The Formation of Solvent Adducts through Cyclopropene Derivatives
Authors: Miyagawa Nobukazu , Karatsu Takashi , Kitamura Akihide
Published: November 2004

3,3-Dimethyl-3H-pyrazoles were photolyzed, and in the presence of 2,4,6-triphenylpyrylium tetrafluoroborate (TPP+) as a sensitizer in acetonitrile; in addition to cyclopropenes, 2H-pyrroles were obtained as solvent adducts to 1,3-radical cation intermediate.
Photolysis of C60 with Cyclic Amino Acids: Preparation of Dihydrofullerenes by Decarboxylation
Authors: Zhang Wen , Su Yang , Gan Liangbing , Jiang Jianfeng , Huang Chunhui
Published: November 2004

Photolysis of C60 with piperidinoacetic acid and morpholinoacetic acid results in the decarboxylation of the acids and formation of the 1,2-dihydrofullerenes C60(H)[CH2N(CH2)5] 1, C60(H)[CH2N(CH2CH2)2O] 2. Under the same conditions the reaction with the methyl esters of the two cyclic amino acids give the fullerropyrrolidine derivatives C60[CH(CH2)4NCHCOOCH3] 3, C60[CH(CH2OCH2CH2)NCHCOOCH3] 4.
Preparation of Sigmatropic 2-Acyloxy-5-perfluoroalkoxytropones: New Monocyclic Troponoid Liquid Crystals with an Enantiotropic Smectic A Phase
Authors: Mori Akira , Takematsu Shinji , Takeshita Hitoshi
Published: November 2004

Monocyclic sigmatropic troponoid liquid crystals with a 2-(perfluoroalkyl)ethoxyl group at C-5 showed an enantiotropic smectic A phase. They have higher melting and clearing points than the corresponding non-fluorinated compounds, which exhibit a monotropic smectic A phase.
Stereoselective Epoxidation of Acyclic Allylic Ethers Using Ketone-Oxone® System
Authors: Kurihara Masaaki , Ishii Kei , Kasahara Yoko , Kameda Mari , Pathak Ashish K , Miyata Naoki
Published: November 2004

The stereselective oxidation of acyclic allylic silyl ethers with dioxiranes generated in situ from Oxone® and ketones provided erythro epoxides.
Synthesis of Dipyridinyls and Terpyridinyls with Phenyl Spacers through Base Induced Ring Transformation Reactions
Authors: Ram Vishnu J , Goel Atul
Published: November 2004

A novel approach to the synthesis of dipyridinyls (3a,b, 5a,b, 6c,d) and terpyridinyls (6a,b, 7a,b) with phenyl and 1,3-terphenyl spacers is delineated by base induced ring transformation reactions of 6-pyridyl-3-carbomethoxy-4-methylthio-2H-pyran-2-ones.
Integrated Chemical Process. One-Pot Preparation of Acetylenes by Peterson-Sulfone Elimination
Authors: Orita Akihiro , Yoshioka Naonori , Otera Junzo
Published: November 2004

Integration of silylation of α-sulfonyl carbanion, addition of the anion of the resulting α-silyl sulfone to aldehyde, Peterson elimination, and sulfone elimination leads to one-pot synthesis of acetylenes.
Integrated Chemical Process. One-Pot Preparation of Olefins by Alkylation and Desulfonylation
Authors: Orita Akihiro , Watanabe Akihiro , Otera Junzo
Published: November 2004

Integration of alkylation of allylic sulfone and reductive desulfonylation under basic conditions effects one-pot synthesis of various olefins.
Construction of a Novel Chemical Model for the Nerve Transmission System Using Self-Oscillating Multi-Phases Liquid Membrane System
Authors: Yoshihisa Hiroshi , Miyamura Kazuo , Gohshi Yohichi
Published: November 2004

A novel multi-phases liquid membrane system, which has two aqueous phases with surfactant, is found to exhibit a synchronisation of the oscillation. Detailed investigation revealed the resemblance of the system with the nerve transmission system.
Lanthanide Triflate-Catalyzed Three-Component Coupling Reactions of Aldehydes, Hydroxylamines, and Alkenes Leading to Isoxazolidine Derivatives
Authors: Shu Kobayashi , Akiyama Ryo , Kawamura Mikako , Ishitani Haruro
Published: November 2004

Three-component coupling reactions of aldehydes, hydroxylamines, and alkenes proceeded smoothly in the presence of a catalytic amount of a lanthanide triflate, to afford isoxazolidine derivatives in high yields with high diastereoselectivities. The asymmetric 1,3-dipolar cycloaddition using a chiral lanthanide catalyst is also described.
Modulation of Flat-band Potential and Increase in Photovoltage for n-Si Electrodes by Formation of Halogen Atom Terminated Surface Bonds
Authors: Fujitani Morio , Hinogami Reiko , Jia J G , Ishida Masaki , Morisawa Kazuhiko , Yae Shinji , Nakato Yoshihiro
Published: November 2004

The flat-band potential (UFB) of n-Si electrodes in concentrated hydrogen halide (HX) solutions, as determined from Mott-Schottky plots and the onset potential of photocurrent, shifts largely toward the negative with the decreasing electronegativity of halogen atoms. XPS studies have shown the presence of halogen atoms on the Si electrodes which were beforehand immersed in the HX solutions. The shift in UFB can be explained as due to changes in surface potential by formation of Si-halogen surface termination bonds.
Efficient Quenching of the Fluorescence of Aromatic Guests by β-Cyclodextrin-Tethered Viologens via Inclusion Complexation
Authors: Park Joon Woo , Park Sang Hee , Lee Bi Ah , Lee Soo-Yeon
Published: November 2004

The fluorescence quenching of 3-(2-naphthoxyl)-1-aminopropane (1), 3-(1-naphthoxyl)-1-aminopropane (2), and 3-(2-dibenzofuranoxyl)-1-aminopropane (3) by β-cyclodextrin (β-CD)-bound viologens is much more efficient than that by dimethyl viologen. The binding studies of the guests with β-CD and lifetime measurements of the quenching indicated that this is due to the static quenching in complexes formed by inclusion of the aromatic guests into β-CD moiety of the β-CD- viologens.
Aerobic Oxidation of Cyclohexane Catalyzed by Fe(III)(5,10,15,20-tetrakis(pentafluorophenyl)porphyrin)Cl in Sub- and Super-Critical CO2
Authors: Wu Xiao-Wen , Oshima Yoshito , Koda Seiichiro
Published: November 2004

Aerobic oxidation of cyclohexane to yield cyclohexanol and cyclohexanone in the presence of a Fe-porphyrin catalyst bearing meso-pentafluorophenyl group and acetaldehyde has been efficiently enhanced in pressurized CO2. The reaction rate takes a maximum value in the neighborhood of critical pressure.
Structural Reconstruction by Selective Extraction of Specific Species: Non-reductive Change from H0.3MoO3 to H1.5MoO3
Authors: Eda Kazuo , Matsuura Naomi , Sotani Noriyuki
Published: November 2004

Under non-reductive condition, H1.5MoO3 of higher reduction degree was found to be formed from H0.3MoO3. This phenomenon resulted from selective extraction of Mo6+ species.
Bilayer Formation in Ethanol from Dialkylammonium Amphiphile Appended with Nitroaniline Moiety
Authors: Kimizuka Nobuo , Tokuhiro Maki , Miyauchi Haruko , Wakiyama Tatsuo , Kunitake Toyoki
Published: November 2004

A double-chain ammonium amphiphile with the p-nitroaniline moiety formed ordered bilayer assemblies in ethanol media. p-Toluenesulfonate counterion effectively stabilized the bilayer. Excitonic interaction among highly oriented chromophores at the bilayer surface was probed by absorption and circular dichroism spectra.
Radical Type Catalytic Oxidation of Butane at Low Temperatures over in-situ Prepared Silica Species
Authors: Satsuma Atsushi , Sugiyama Naruaki , Kamiya Yuichi , Hattori Tadashi
Published: November 2004

Silica species prepared by in-situ method using silicon alkoxide as precursor were found to be active for radical type oxidation of butane at low temperatures, i.e., below 650 K.
Dicyanodiaryl-p-quinodimethanes: An Efficient Synthesis Using a New Dilithium Reagent and Their Solvent-Dependent Properties
Authors: Kawase Takeshi , Wakabayashi Masaki , Takahashi Chizuko , Oda Masaji
Published: November 2004

A series of 7,7-dicyano-8,8-diaryl-p-quinodimethane are readily prepared by the reaction of 4-lithiophenyldicyanomethyllithium with diaryl ketones; the 8-(4-dimethylaminophenyl) compounds thus obtained show solvent-dependent absorption spectra and bond rotation of the exocyclic double bonds and form a head-to-tail dimeric structure in the crystal.
Hexacyanotriquinarenemethane Dianion
Authors: Kawase Takeshi , Wakabayashi Masaki , Oda Masaji
Published: November 2004

Hexacyanotriquinarenemethane dianion is obtained as a stable, highly teterapolar substance in one step by the reaction of 4-lithiophenyldicyanomethyllithium with ethyl chloroformate. The acidity of its conjugate acid was determined to be pKa1 = ca. 2.5 and pKa2 = 3.0.
Syntheses and Spin Trappings of 3-Hydroxymethyl-5,5-dimethyl-1-pyrroline N-oxide and 3-(3-Hydroxypropyl)-5,5-dimethyl-1-pyrroline N-Oxide
Authors: Sato Rikiya , Ito Kazuyoshi , Igarashi Hayato , Uejima Mitsugu , Nakahashi Kenichi , Morioka Junko , Takeishi Makoto
Published: November 2004

New nitrones of 5,5-dimethyl-1-pyrroline N-oxide (DMPO)-type, 3-hydroxymethyl-5,5-dimethyl-1-pyrroline N-oxide (3HM-DMPO) and 3-(3-hydroxypropyl)-5,5-dimethyl-1-pyrroline N-oxide (3HP-DMPO), were synthesized and tested for the ability in radical trapping of oxygen-centered radicals. 3HM-DMPO trapped superoxide but did not hydroxyl radicals, whereas 3HP-DMPO served as a trap for both radicals.
14N NMR Spectra Sensitively Reflect Surface Curvature and Segmental Motion of Hydrophilic Headgroups in Lipid Bilayers and Micelles
Authors: Okamura Emiko , Wakai Chihiro , Matubayasi Nobuyuki , Nakahara Masaru
Published: November 2004

To study the surface curvature dependence of the dynamical structure of the headgroups of phospholipids forming bilayers and micelles, 14N NMR spectra were measured for liposomes of phosphatidylcholine and for micelles of lysophosphatidylcholine. Choline 14N NMR signals were observed for the micelles and small unilamellar vesicles, which involve high surface curvatures. The signals vanished, on the other hand, when the diameter was increased from 55 to 100 nm in unilamellar vesicles.
Compressibility and Volume Changes of Lysozyme Due to Guanidine Hydrochloride Denaturation
Authors: Kamiyama Tadashi , Gekko Kunihiko
Published: November 2004

The apparent specific volume and adiabatic compressibility of lysozyme largely decreased upon guanidine hydrochloride denaturation. These results demonstrate that a large amount of amino acid residues exposes accompanying an increase in hydration and a decrease in the internal cavity. Both parameters deviated from the two-state transition curves, suggesting noncooperative disruption of the compactness and the secondary structure.
A Diradical Bridging Ligand with a Triplet Ground State
Authors: Oshio Hiroki , Umeno Makoto , Fukushi Toru , Ito Tasuku
Published: November 2004

A diradical of nitronyl nitroxide, 2-phenyl-4,6-bis(1′-oxyl-3′oxido-4′,4′5′,5′-tetramethyl-4′,5′-dihydro-1′H-imidazole-2′-yl)pyrimidine, was prepared and characterized to have a triplet ground state.
On the Origin of cis-Effect in 1,2-Difluoroethene
Authors: Yamamoto Takashi , Tomoda Shuji
Published: November 2004

The origin of cis-effect in 1,2-difluoroethene has been identified by quantitative analysis of electron delocalization using natural bond orbital analysis at the HF/6-311++G(3df, 3pd) level. It was concluded that both the delocalization of halogen lone-pair electrons (LP effect) and the antiperiplanar effects (AP effect) between vicinal antiperiplanar bonds are most likely to be the major sources of cis-effect with the latter effect being the more predominant.
Magnetic Ordering of 5,10,15,20-Tetrakis[4′-(trifluoromethyl)phenyl]-porphyrinatomanganese(III) Tetracyanoethenide with a 6.0 K Tc
Authors: Sugiura Ken-ichi , Mikami Shinji , Tanaka Takanori , Sawada Masami , Manson Jamie L , Miller Joel S , Sakata Yoshiteru
Published: November 2004

An elecron-transfer complex of a substituted manganese porphyrin with tetracyanoethylene was prepared. Crystal structure analysis revealed that there exists quasi-two dimensional interaction in the complex, which was shown to be a magnet with Tc of 6.0 K.
Lewis Acid Trifluoroboron Coordination to trans-Dioxorhenium(V) Moiety: Structural and Spectroscopic Characterization of trans-[ReV(O)(OBF3)(1-MeIm)4](BF4)(1-MeIm=1-Methylimidazole)
Authors: Abe Masaaki , Mikami Tsuyoshi , Sugimoto Hideki , Nagasawa Akira , Sasaki Yoichi
Published: November 2004

A mononuclear rhenium(V) complex having a BF3 moiety on one of the two oxo ligands, trans-[ReV(O)(OBF3)(1-MeIm)4](BF4)(1-MeIm = 1-methylimidazole), was isolated and characterized. Two one-electron redox waves were observed in 0.1 M (n-C4H9)4NPF6/CH3CN (M = mol dm−3).
Base Promoted Preparation of Alkenylsilanols from Allylsilanes
Authors: Akiyama Takahiko , Imazeki Shigeaki
Published: November 2004

On treatment of allyl-t-butyldiphenylsilane with t-BuOK and 18-Crown-6 in DMSO at room temperature, isomerization of the olefinic double bond and subsequent substitution of phenyl group with hydroxy group took place smoothly to afford alkenylsilanol derivatives in good yields.
Open Dimer Participation in Chelation Controlled Addition of Methyllithium Dimer to α-and β-Alkoxy Aldehydes
Authors: Mori Seiji , Kim Byeang Hyean , Nakamura Masaharu , Nakamura Eiichi
Published: November 2004

The chelation controlled additions of a MeLi dimer to alkoxy carbonyl compounds occur through an open dimer cluster, in which only one lithium atom participates in the chelate formation and the other acts as an anchor of the methyl nucleophile to be delivered to the carbonyl group. Solvation of a lithium atom with a water molecule does not change much the structure of the transition state.
Bifunctional Receptor. Rate-acceleration of Oxidative Decarboxylation of Pyruvate by Thymine-Thiazolium and Zn2+ in the Presence of a Melamine Derivative Bearing α-Bipyridine Moiety in Chloroform-Acetonitrile
Authors: Utsumi Katsuhiro , Nishihara Yasuaki , Hoshino Kazuhiko , Kondo Shin-ichi , Nabeshima Tatsuya , Yano Yumihiko
Published: November 2004

Rates of oxidative decarboxylation of pyruvate by thymine-thiazolium were found to be accelerated by Zn2+ in the presence of a melamine derivative bearing an α-bipyridine moiety in CHCl3-MeCN (9 : 1 v/v) under anaerobic conditions.
Efficient Electroluminescence from Tris(4-methyl-8-quinolinolato)aluminum(III)
Authors: Kido Junji , Iizumi Yasuhiro
Published: November 2004

A green-light-emitting aluminum complex, tris(4-methyl-8-quinolinolato)Al (III) (Almq3), was synthesized and used as an emitter material in organic electroluminescent (EL) devices. The device structure of glass substrate / indium-tin oxide / tetraphenyldiamine derivative / Almq3 / Mg:Ag was employed. The EL device exhibited efficient green light originating from Almq3 with a maximum luminance of 26000 cd/m2 at 14 volt. The maximum external quantum efficiency was 2.5% photons / electron.
Synthesis of a Molybdenum Cluster Complex [Mo12(μ3-S)14(μ4-S)2(PEt3)10] with Chevrel Phase Type Intercluster Bondings
Authors: Amari Shingo , Imoto Hideo , Saito Taro
Published: November 2004

The reaction of [Mo6S8(PEt3)6] with elemental sulfur in toluene at reflux temperature formed a dodecanuclear cluster complex [Mo12S16(PEt3)10] with the Chevrel phase type intercluster bonding.
Selective Uptake of Copper(II) and Zinc(II) Ions Using Liposomes without Ionophores
Authors: Kamidate Tamio , Yamaguchi Junichi , Suita Takahiro , Tani Hirofumi , Watanabe Hiroto
Published: November 2004

The multilamellar vesicles (MLVs) without ionophores were applied to the separation media of Cu2+ and Zn2+. Mn2+, Fe2+, Co2+ and Ni2+ were impermeable into the MLVs. The uptake rate and efficiency of Cu2+ were dependent on the charge-type of the MLVs surface, while the effect of copper salts on the uptake rate and efficiency was little observed.
Exalted Resonance Effect in the Aryl-Assisted Solvolyses of 2-Aryl-2-(trifluoromethyl)ethyl m-Nitrobenzenesulfonates
Authors: Okamura Mutsuo , Hazama Ken , Ohta Mie , Kato Keiko , Horaguchi Takaaki , Ohno Atsuyoshi
Published: November 2004

The substituent effects on solvolysis of 2-aryl-2-(trifluoromethyl)ethyl m-nitrobenzenesulfonates, in acetic acid and in 80% aqueous trifluoroethanol, were analyzed by Yukawa-Tsuno equation. The resonance demands (r = 0.77 in acetic acid) were larger than that of standard aryl-assisted solvolysis by 0.2. This enlargement should depend on a destabilization of aryl-assisted transition-state by an electron-withdrawing trifluoromethyl group.
Inverted Bond and Its Effect on the Strains of [1.1.1]Propellane Frameworks
Authors: Inagaki Satoshi , Yamamoto Tetsushi , Ohashi Shigenori
Published: November 2004

The delocalization of σ electrons from a normal bond to a geminal “inverted” bond was shown to be strongly bonding due to the orbital phase property. The bonding property of the geminal delocalization was predicted to increase with bond inversion. The central bond between the bridgehead atoms in the [1.1.1]propellane frameworks (1) is inverted to relax the ring strains as the row of the elements is high in the periodical table. The strain decreases in the order of 1a (M = C) > 1b (M = Si) > 1c (M = Ge) > 1d (M = Sn).
Hydrogen Abstraction from Transition Metal Hydrides by Gold Alkoxides Giving Gold-Containing Heterodinuclear Complexes
Authors: Usui Yoko , Hirano Masafumi , Fukuoka Atsushi , Komiya Sanshiro
Published: November 2004

Gold(I) alkoxides, Au(OR)L (L = PPh3, PCy3; R = CH(CF3)2, CH2CF3, Ph) smoothly abstract a hydrogen from transition metal hydrides (MH = CoH(CO)4, MoHCp(CO)3, WHCp(CO)3, MnH(CO)5, WHCp(CO)2(PPh3)) to give corresponding dinuclear complexes LAu-M with liberation of equimolar amount of ROH. Similar reactions of gold(III) alkoxides, cis-AuMe2-(OR)L also give dinuclear intermediates LMe2Au-M, from which preferential reductive elimination of ethane takes place when M is more electron withdrawing.
Synthesis of a Hexagonal Mesostructured Aluminophosphate
Authors: Kimura Tatsuo , Sugahara Yoshiyuki , Kuroda Kazuyuki
Published: November 2004

A hexagonal mesostructured aluminophosphate was successfully synthesized from the mixture of Al(OiPr)3, 85% H3PO4, tetramethylammonium hydroxide, hexadecyltrimethylammonium chloride, and water.
Rh/One-atomic Layer GeO2/SiO2 as a New Catalyst for Ethyl Acetate Hydrogenation at a Low Pressure
Authors: Okumura Kazu , Asakura Kiyotaka , Iwasawa Yasuhiro
Published: November 2004

A new Rh/one-atomic layer GeO2/SiO2 catalyst was prepared by supporting Rh6(CO)16 precursor on the one-atomic layer GeO2/SiO2 followed by reduction at 423-523 K. The obtained catalyst was active and selective for conversion of ethyl acetate to ethanol by H2 under mild reaction conditions, whereas Rh/bulk-GeO2 and Rh/SiO2 were inactive for this reaction. Rh carbonyl cluster, Rh metal, and RhGe alloy were formed on the one-atomic layer GeO2/SiO2 depending on the pre-reduction temperature. A combination of metallic Rh particles and one-atomic layer GeO2 was most active for the ethanol production.
Supported K-salts as a New Solid Base Catalyst
Authors: Yamaguchi Tsutomu , Zhu J-H , Wang Y , Komatsu Masa-aki , Ookawa Masashi
Published: November 2004

A highly basic solid catalyst was obtained by dispersing potassium salts such as KNO3, K2CO3 over alumina at the surface density of 10-15×1018 K+ ions m−2 and activating them at 773-873 K in vacuo; the activity for the double bond isomerization of cis-but-2-ene of thus obtained catalysts was one order of magnitude higher than that of MgO, a typical solid superbase.
CO2 Hydration by Mimic Zinc Complex for Active Site of Carbonic Anhydrase
Authors: Nakata Kou , Uddin M Khabir , Ogawa Kazuya , Ichikawa Kazuhiko
Published: November 2004

The deprotonation of the zinc-bound water and the zinc-bound bicarbonate which arose from hydration of CO2 have been simulated in vitro according to the proposed mechanism for carbonic anhydrase, with the model complex of its own active site, [LZn(OH2)]2+, where L = tris(2-benzimidazolylmethyl)amine.
Mechanism of Cis-to-Trans One Way Isomerization of Stilbene and Formation of Its Stable Dimer Cation Radicals in Zeolite Cavities
Authors: Kojima Masanobu , Takeya Haruhiko , Kuriyama Yasunao , Oishi Shigero
Published: November 2004

Cis-to-trans one way isomerization of stilbene in the first case catalyzed by proton, and then, secondly through electron transfer, occurred in acidic zaolites without light, suggesting that dimer cation radicals with charge transfer interaction between trans-stillbene and its cation radical may be formed in H-ZSM-5, whereas 1,4-dimer cation radicals of stilbene may be produced in H-mordenite.
Promotion in Activity and Stability of Nickel-Magnesia Solid Solution Catalyst by Structural Rearrangement via Hydration for Reforming of CH4 with CO2
Authors: Chen Yang-guang , Tomishige Keiichi , Fujimoto Kaoru
Published: November 2004

It was found that the water treatment of Ni0.03Mg0.97O solid solution catalyst promotes the catalytic activity and stability for CO2 reforming of CH4 and that this promoting effect is attributed to the structural rearrangement of solid solution via the formation of nickel and magnesium hydroxides.
Generation of Patterned Color Images in Polymer Film with Photogenerated Base
Authors: Kim Jong-Man , Chang Tae-Eun , Park Ran Hee , Kim Dong Jin , Han Dong Keun , Ahn Kwang-Duk
Published: November 2004

Patterned color images in the polymer film have been prepared using photolabile protecting groups. Irradiation of a polymer film with 360-nm UV through a photomask followed by chemisorption of organic dyes afforded patterned color images in the polymer film.
Fluorescence Sensing Behavior of Thin-films of Benzofuranoquinol Clathrate Host upon Exposure to Various Gaseous Amines
Authors: Yoshida Katsuhira , Ooyama Yousuke , Tanikawa Sachiko , Watanabe Shigeru
Published: November 2004

The benzofuranoquinol clathrate host exhibits color and fluorescence changes upon exposure to various gaseous amines both in the crystalline state and in the thin-film state. The decrease of long-wavelength absorption and the dramatic fluorescence enhancement with blue-shift of emission maximum depending on the enclathrated amine molecules were observed. The response time for the optical sensing was greatly improved by using the host in the thin-film state.
Evidence of Network Formation in W/O Emulsion and Their Rheological Property
Authors: Chen Wei , Li Jin-ru , Ma Zhan-fang , Jiang Long
Published: November 2004

A rheological property study on water-in-diesel oil emulsion shows the importance of network formation for the stability of the system.
Chiral Recognition of Diketopiperazines with Xanthone Receptors
Authors: Martín Mercedes , Raposo César , Oliva Ana I , Simón Luis , Caballero Cruz , Morán Joaquín R
Published: November 2004

Good chiral recognition of diketopiperazines has been obtained with a receptor that combines a xanthone with a phosphonamide as an asymmetric group. Silicagel plates impregnated with an enantiomerically pure diketopiperazine provide an easy and effective way to resolve the receptor racemic mixture. The strong (R,R. R) complex yields a spot with a larger Rf, probably because the complex is less polar than the free receptor.
Soluble Copolymers of p-Phenylene and m-Phenylene. Their Basic Properties
Authors: Yamamoto Takakazu , Wu Biyao , Choi Byoung-Ki , Kubota Kenji
Published: November 2004

Copolymers of p-phenylene and m-phenylene are soluble in various solvents when the p-phenylene : m-phenylene ratio is in a range of about 30:70 through 10:90. The copolymers take a random coil-like structure in solutions as revealed by light scattering analysis.
HI-Mediated Cyclization of o-Alkynylstyrenes
Authors: Saito Shinichi , Homma Miyako , Gevorgyan Valdimir , Yamamoto Yoshinori
Published: November 2004

o-Alkynylstyrenes cyclized in the presence of hydroiodic acid to yield polysubstituted iodoindenes. This reaction provides an efficient synthetic method for the preparation of polysubstituted iodoindenes.
Optical Resolution of Thermodynamically Stabilized Selenoxides by 8-(Dimethylamino)-1-naphthyl Group
Authors: Taka Hideo , Matsumoto Akikuni , Shimizu Toshio , Kamigata Nobumasa
Published: November 2004

Optically pure selenoxides, stabilized by intramolecular coordination of amino group of 8-(dimethylamino)-1-naphthyl substituent to the selenium atom, were isolated by chromatographic resolution using an optically active column. Stereochemistry of the optically active selenoxides was also examined.
Triplet Sensitized Laser Flash Photolysis of BNN3, Caged Nitric Oxide
Authors: Yoshida Morikatsu , Ikegami Masashi , Namiki Shigeyuki , Arai Tatsuo , Fujimori Ken
Published: November 2004

The excited triplet state of N,N′-dimethyl-N,N′-dinitroso-p-phenylenediamine (BNN3, λmax: 299 nm), caged nitric oxide (ET: 230 kJ mol−1), was found to readily undergo N–N bond homolysis to release NO. This suggests that by covalently binding a triplet sensitizing chromophore, e.g., biacetyl, to BNN3 N-methyl group, its NO photoreleasing light can be switched from UV to visible, less cytotoxic light, such as 425 nm.
Successive Antiferromagnetic and Superconducting Transitions in an Organic Metal, κ-(BETS)2FeCl4
Authors: Otsuka Takeo , Kobayashi Akiko , Miyamoto Yasuhisa , Kiuchi Junji , Wada Nobuo , Ojima Emiko , Fujiwara Hideki , Kobayashi Hayao
Published: November 2004

The ac magnetic measurements on an organic metal, κ-(BETS)2FeCl4 down to 60 mK revealed successive antiferromagnetic and superconducting phase transitions at about 0.65 K (≈TN) and 0.1 K (≈TC), respectively. These transitions correspond to the similar transitions in the Br-analogue, κ-(BETS)2FeBr4 but the transition temperatures of FeCl4 system are significantly lower than those of FeBr4 system (TN = 2.5 K; TC = 1.1 K).
An EPR Study on Nitrogen Monoxide Adsorbed on Sodium Ion-Exchanged A-type Zeolite
Authors: Yahiro Hidenori , Lund Anders , Benetis Nikolas P , Shiotani Masaru
Published: November 2004

Temperature-dependent EPR spectra of nitrogen monoxide (NO) introduced into sodium ion-exchanged A-type (Na-A) zeolite demonstrated that two types of NO monoradical and one NO-NO radical pair were formed on the zeolites and that the thermally less stable NO monoradical was converted into the thermally stable one upon warming from 30 K to 100 K.
A Mild and Chemoselective Dealkylation of Alkyl Aryl Ethers by Cerium(III) Chloride-NaI
Authors: Yadav J S , Reddy B V Subba , Madan Ch , Hashim S Riaz
Published: November 2004

The alkoxy groups present ortho to carbonyl group in alkoxybenzaldehydes are selectively deprotected in high yields leaving other alkoxy groups unaffected by cerium(III) chloride–NaI in refluxing acetonitrile under neutral reaction conditions.
Mesomorphic Properties of Oligosilanes with Phenyl End Groups
Authors: Yatabe Tetsuo , Minami Nobutsugu , Okumoto Hajime , Ueno Katsuhiko
Published: November 2004

Oligosilanes with phenyl end groups, Ph(SiMe2)nPh where n = 10, 11, 12 and 13, were synthesized and their thermal and structural properties were studied. Dodecamer and tridecamer possessed mesophases showing the interdigitated structure in the range of 126–139 and 127–155 °C, respectively. In the mesophase, the silicon chains adopted the all-trans conformation.
Mössbauer Study of Matrix Isolated Iron Fluorides Produced by a Reaction of Laser-Evaporated Iron Atom and Sulfur Hexafluoride
Authors: Yamada Yasuhiro , Katsumata Keiichi
Published: November 2004

The reaction-products of laser-evaporated iron atoms with sulfur hexafluoride SF6 were isolated in a low-temperature matrix and their Mössbauer spectra obtained. Fe2F6 molecules were produced in a pure SF6 matrix, whereas FeF3 and Fe2F4 were also produced in a diluted SF6/Ar matrix. A molecular orbital calculation supports the assignment of the species.
Shifts of Core-level Electron Binding Energies for SrBi2Ta2O9 Nano-particles
Authors: Takada Syozo , Kohiki Shigemi , Adachi Yuji , Shimizu Akihiko , Takahashi Seiji , Mitome Masanori , Oku Masaoki
Published: November 2004

The electron binding energies of Ta 4d5/2 and Sr 3p3/2 levels of SrBi2Ta2O9 nano-particles were larger by 1.2 eV than these of bulk SrBi2Ta2O9, while the Bi 4d5/2 electron binding energy was smaller by 1.4 eV than the bulk. Charge distribution in the unit cell of the nano-particles differs from that of the bulk.
A New Synthetic Route to Heteroarylsilanes via Ruthenium-Catalyzed C-H/SiR3 Coupling
Authors: Kakiuchi Fumitoshi , Matsumoto Mitsutaka , Sonoda Motohiro , Fukuyama Takahide , Chatani Naoto , Murai Shinji , Furukawa Naoyuki , Seki Yoshio
Published: November 2004

Heteroarylsilanes can be synthesized by the reaction of heteroaromatic compounds with triorganovinylsilanes with the aid of a Ru3(CO)12-catalyst. A variety of heteroaromatic compounds can be used in this C–H/SiR3 coupling. The coupling reaction was observed to take place at a position β to the directing carbonyl group, e.g., ketone, ester, and amide, in the case of heteroaromatic compounds.
Liquid Crystals with a 5-Cyanotropone Skeleton: 2-(4-Alkoxybenzoyloxy)-5-cyanotropone and 2-(4-Alkoxybenzoylamino)-5-cyanotropones
Authors: Hashimoto Masashi , Ujiie Seiji , Mori Akira
Published: November 2004

New troponoid liquid crystals with an electron-withdrawing cyano group at the C-5 position of tropolone and 2-aminotropone rings were prepared. Tropolone derivatives had nematic phases with lower thermal stabilities and smectic A phases with higher thermal stabilities than the corresponding benzenoids while thermal stabilities of the aminotropone derivatives were better than those of the benzenoids. The X-ray diffraction studies indicated that the ratios of the layer spacing measured in the smectic A phase and the calculated molecular length are 1.3 for a tropolone derivative and 1.45 for an aminotropone derivative. They formed interdigitated bilayers.
Enantioface-Selective Complexation of Prochiral Dienes on Planar-Chiral Cyclopentadienylruthenium Complexes Bearing an Anchor Phosphine Ligand
Authors: Matsushima Yuji , Onitsuka Kiyotaka , Takahashi Shigetoshi
Published: November 2004

Planar-chiral cyclopentadienylruthenium complex 1 [{η5:η1-C5H2-2-Me-4-Ph-1-CO2CH2CH2PPh2}Ru(CH3CN)2][PF6] bearing an anchor phosphine ligand exhibits a high enantioface selectivity in the reaction with prochiral dienes 2 to give planar-chiral η4-diene complex 3.
The Application of Polyester Microchip to Capillary Electrophoresis
Authors: Xu Wei , Uchiyama Katsumi , Shimosaka Takuya , Hobo Toshiyuki
Published: November 2004

Inexpensive disposable polyester microchip was fabricated through well-known photolithographic and wet-chemical etching procedure. Laboratory-scale laser induced fluorescence equipment was employed in this work to evaluate the separation performance of the polyester chip by using two laser dyes as samples. The polyester chip exhibited much higher separation efficiency than traditional fused silica capillary under the same miceller electrokinetic chromatographic condition.
The First Competitive Formation of [4] and [2]Supercyclodextrins by Self-Association of an α-Cyclodextrin Bearing a Bisazophenol Group
Authors: Fujimoto Tatsuhiko , Sakata Yoshiteru , Kaneda Takahiro
Published: November 2004

A new lipophilic α-cyclodextrin 1 bearing a bisazophenol group as an internal guest self-associates to form a cyclic dimer 2 and the first [4]supercyclodextrin 3p competitively, and the two successive association equilibria have been first analyzed.
Fast Internal Conversion in Nonfluorescent Carbonyl Anthracenes
Authors: Tanaka Fujio , Furuta Tomoaki , Okamoto Masami , Hirayama Satoshi
Published: November 2004

The quantum yield of triplet formation (φT) for two nonfluorescent molecules of 9-acetylanthracene and 9-benzoylanthracene was determined with a time-resolved thermal lensing method (TRTL). The value of φT for 9-benzoylanthracene was 0.19 in cyclohexane, indicating that a fast internal conversion process with a rate constant of 4.0 × 1010 s−1 exists in the deactivation from the first excited singlet state (S1).
Synthesis and Structure of a New Reduced Isopolyvanadate, [V17O42]4−
Authors: Hayashi Yoshihito , Fukuyama Kumiko , Takatera Tamaki , Uehara Akira
Published: November 2004

Reduced heptadecavanadate [V17O42]4− has been synthesized from [H3V10O28]3− by the reaction using palladium 1,5-COD complex, and characterized by a single crystal X-ray structure analysis. The structure can be regarded as a fused decavanadate and consists of an arrangement of thirteen edge shared VO6 octahedra and four VO5 square pyramids.
Preparation and Characterization of Polynuclear Manganese(III) Complexes with SalbnH2, N,N′-Disalicylidene-1,4-diaminobutane
Authors: Asada Hideyuki , Fujiwara Manabu , Matsushita Takayuki
Published: November 2004

The reactions between the Schiff base ligand salbnH2, N,N′-disalicylidene-1,4-diaminobutane and MnIII(Oac)3·2H2O have been found to give a polymer complex, [MnIII(μ-salbn)Oac]n  1 or a dinuclear complex, [MnIII(μ-salbn)Cl]2  2 by the addition of LiCl. In both complexes, salbn ligands act as a bridging bidentate ligand toward a manganese ion. The complex 2 has been found to decompose H2O2 catalytically with dioxygen evolution, cycling its oxidation states between MnIII2 and MnII2.
Palladium-Catalyzed Synthesis of Butatrienes
Authors: Ogasawara Masamichi , Ikeda Hisashi , Ohtsuki Kazunori , Hayashi Tamio
Published: November 2004

Palladium-catalyzed synthesis of functionalized butatrienes was achieved starting from 2-bromo-1-buten-3-yne derivatives and nucleophiles. The reaction proceeded under very mild conditions giving the products in moderate to good yields. The reactivity of the bromobutenyne substrates was highly dependent on substituents at 1-position. A subtle balance of nucleophilicity and basicity in the nucleophiles was also important for the success of the reactions.
Novel Triad Dyes with Wide Spectral Response for SnO2 Nanoporous Electrode
Authors: Zhu Weihong , Tian He , Gao Enqin , Yang Maizhi , Müllen Klaus
Published: November 2004

Some novel trichromophoric dyes for Grätzel-type solar cell sentisizer, in which perylene unit and oxadiazole or naphthalimide units were linked with saturated covalent bonds, have been synthesized. The sensitization by the dyes increases photocurrent of nanostructured porous SnO2 electrode obviously in a wide spectral region (from 310 nm to 700 nm). The maximum value of the IPCE has reached 12%.
Direct Conversion of Azides and Benzyl Carbamates to t-Butyl Carbamates Using Polymethylhydrosiloxane and Pd-C
Authors: Chandrasekhar S , Chandraiah L , Reddy Ch Raji , Reddy M Venkat
Published: November 2004

One step direct conversion of azides and benzyl carbamates to t-butyl carbamates is achieved using inexpensive and safe hydride source namely polymethylhydrosiloxane (PMHS) under Pd-C catalysis.
Compensation Effect between Differential Activation Enthalpy and Entropy in Subtilisin-Catalyzed Kinetic Resolutions of Secondary Alcohols
Authors: Ema Tadashi , Yamaguchi Kunihiro , Wakasa Yuji , Tanaka Nobuaki , Utaka Masanori , Sakai Takashi
Published: November 2004

Thermodynamic parameters for subtilisin-catalyzed kinetic resolutions of secondary alcohols were determined, and a compensation effect between ΔΔH‡ and ΔΔS‡ was found. These data are explained in terms of the transition-state model.
First Isolations and Structuresof the cis-Bis(phosphoranido) Palladium(II) and Platinum(II) Complexes
Authors: Kajiyama Kazumasa , Hirai Yoshinari , Otsuka Takeshi , Yuge Hidetaka , Miyamoto Takeshi Ken
Published: November 2004

The reaction of a phosphoranide generated from a P–H spirophosphorane bearing two 8-oxy-1-naphthyl groups with (dmpe)MCl2 (M; Pd, Pt) [dmpe; bis(dimethylphosphino)ethane] gives the first cis-bis(phosphoranido) palladium(II) and platinum(II) complexes. The crystal structures of the racemic isomers of the complexes are determined by the X-ray structural analyses.
Living Polymerization of Aryl Isocyanides by Multifunctional Initiators Containing Pd–Pt µ-Ethynediyl Unit
Authors: Ohshiro Nobuaki , Shimizu Atsushi , Okumura Reiko , Takei Fumie , Onitsuka Kiyotaka , Takahashi Shigetoshi
Published: November 2004

Multinuclear acetylide complexes containing two or three Pd–Pt µ-ethynediyl units have been prepared and successfully applied to a multifunctional initiator for the living polymerization of aryl isocyanides, which gives two- or three-armed poly(isocyanide)s with a narrow polydispersity index in good yields.
Effects of Acetic Anhydride on the Activation and Polymerization Rates in Nitroxide-Mediated Polymerization of Styrene
Authors: Goto Atsushi , Tsujii Yoshinobu , Fukuda Takeshi
Published: November 2004

In order to assess the recent suggestion of Hawker et al.1 that the C–ON bond of an alkoxyamine is weakened by acetic anhydride (Ac2O), the activation (dissociation) rate constant kact of a polystyrene–nitroxide adduct was directly determined in the presence of Ac2O. The result showed that Ac2O has no effect on the activation rate, contrary to the suggestion. On the other hand, Ac2O was confirmed to accelerate the polymerization rate. The mechanism of acceleration was discussed.
Synthesis and Formation Mechanism of Bi(Se,S) Nanowires via a Solvothermal Template Process
Authors: Su Huilan , Xie Yi , Gao Peng , Lu Hong , Xiong Yujie , Qian Yitai
Published: November 2004

Hexagonal Bi(Se,S) nanowires (20 nm × 1.5 µm) were prepared for the first time via a mild solvothermal template reaction of BiCl3 with triphenylphosphine sulfide (TPPS) and elemental Se in ethylenediamine (en) at 120 °C for 20 h. In this process, the sulfur source TPPS as a template, the solvent ethylenediamine, and reaction temperature were critical factors of forming hexagonal Bi(Se,S) nanowires.
Differential Pressure Effect on Bimodal Inclusion Complex of β-Cyclodextrin with a Nitroxide Radical Probe as Studied with Electron Paramagnetic Resonance
Authors: Sueishi Yoshimi , Kasahara Masamichi , Kotake Yashige
Published: November 2004

Differential pressure effect was found in the inclusion equilibrium of bimodal inclusion (phenyl-in and t-butyl-in) complexes of β-cyclodextrin with the free-radical probe diphenylmethyl t-butyl nitroxide. A high-pressure electron paramagnetic resonance (EPR) system was employed to determine the shift of the EPR spectra under high static pressure. With increasing external pressure, the equilibrium between phenyl-in and t-butyl-in complexes shifts to the t-butyl-in side.
Mo-Containing SBA-1 Mesoporous Molecular Sieves as Catalysts for Partial Oxidation of Methane
Authors: Dai Lian-Xin , Teng Yong-Hong , Tabata Kenji , Suzuki Eiji , Tatsumi Takashi
Published: November 2004

Mo-Containing SBA-1 mesoporous molecular sieves synthesized under strongly acidic conditions exhibited catalytic performance, superior to that of Mo-impregnated pure silica SBA-1 or silica gel, for the partial oxidation of methane with oxygen as an oxidant.
Regioselective Polymerization of Sorbitol and Divinyl Sebacate Using Lipase Catalyst
Authors: Uyama Hiroshi , Klegraf Ellen , Wada Satoshi , Kobayashi Shiro
Published: November 2004

A sugar-containing polyester was synthesized by the polymerization of sorbitol and divinyl sebacate using Candida antarctica lipase as catalyst in acetonitrile. NMR analysis showed that sorbitol was regioselectively acylated at 1- and 6-positions.
Amperometric Measurement of Nitric Oxide (NO) Using an Electrode Coated with Polydimethylsiloxane
Authors: Mizutani Fumio , Hirata Yoshiki , Yabuki Soichi , Iijima Seiichiro
Published: November 2004

Dip-coating of a platinum electrode from an aqueous dispersion of polydimethylsiloxane provided an amperometric nitric oxide (NO) sensor with high performance characteristics such as rapid response (100% response time, 3 s), high sensitivity (detection limit, 20 nM; 1 M = 1 mol dm−3), high stability (usable for more than a month) and high selectivity (e.g., the ratio of response for uric acid to that for the same concentration of NO, less than 10−4).
Novel Synthesis of Fluoroalkylated α,β-Unsaturated Ketones by the Oxygenative Perfluoroalkylation of α-Chlorostyrenes
Authors: Yoshida Masato , Ohkoshi Masanori , Iyoda Masahiko
Published: November 2004

The photochemical reaction of perfluoroalkyl iodide with α-chlorostyrenes in the presence of hexabutylditin under oxygen atmosphere produced fluoroalkylated α,β-unsaturated ketones in moderate to good yields.
Rotaxanes Functionalized by Chirality: Novel Rotaxanes Consisting of Binaphthol-Based Chiral Crown Ether
Authors: Tachibana Yuya , Kihara Nobuhiro , Ohga Yasuko , Takata Toshikazu
Published: November 2004

A chiral crown ether 1 was synthesized from (R)-1,1′-bi-2-naphthol. Chiral rotaxanes were prepared by end-capping of pseudorotaxanes consisting of 1 and secondary ammonium salts. An ammonium salt bearing terminal anthracene group gave stable pseudorotaxane. Chiral induction was observed during end-capping by radical conjugate addition of a bulky thiol to the pseudorotaxane bearing methacrylate group at the terminus.
Chirally-Ordered Fullerene Assemblies Found in Organic Gel Systems of Cholesterol-Appended [60]Fullerenes
Authors: Ishi-i Tsutomu , Ono Yoshiyuki , Shinkai Seiji
Published: November 2004

Cholesterol-appended [60]fullerene gelators 2a and 2b were prepared and their gelation properties were investigated. 2a with a natural C-3 configuration can gelate dichloromethane whereas 2b with an inverted C-3 configuration could not gelate any solvents. UV/Vis and CD spectroscopic studies indicated that the [60]fullerene moiety in 2a is enforced to chirally orient in the gel state.
Novel Synthesis and Crystal Structure of 1,4-Bis(3-chloro-1,1,3-trimethylbutyl)benzene
Authors: Kéki Sándor , Deák György , Bényei Attila Cs , Zsuga Miklós
Published: November 2004

A symmetrical isobutene adduct was synthesized with high yield at −80 °C by means of the 1,4-bis(1-chloro-1-methylethyl)benzene/isobutene system using tetrabutylammonium chloride. The main product under the reaction conditions applied was the symmetrical isobutene adduct, which was crystallized from a hexane/dichloromethane solution and the crystals were analyzed by X-ray crystallography.
Formation and Spectroscopic Characterization of the Carbon Monoxide Adduct of an Alkanethiolate-Coordinated Heme
Authors: Matsu-ura Mikiya , Tani Fumito , Naruta Yoshinori
Published: November 2004

The CO adduct of a thiolate-coordinated heme was obtained by two different methods and characterized by UV–vis and resonance Raman spectroscopy. The n(Fe–CO) band was observed at 428 cm−1. The unusually low frequency indicates the extremely strong σ-donation from the thiolate axial ligand to the heme iron.
A Novel and Chemoselective Protocol for the Reduction of Azides Using FeCl3–Zn System
Authors: Pathak Diganta , Laskar Dhrubojyoti D , Prajapati Dipak , Sandhu Jagir S
Published: November 2004

Chemoselective reduction of alkyl, aryl, aroyl and arylsulfonyl azides to the parent amines or amides, respectively, occurs in excellent yields upon treatment with a novel inexpensive reduction system consisting of FeCl3–Zn at room temperature.
Self-Assembly of Chelator-Type Nucleic Acid Mimics into a Single-Stranded ZnII Coordination Polymer
Authors: Hatano Akihiko , Tanaka Kentaro , Shiro Motoo , Shionoya Mitsuhiko
Published: November 2004

The synthesis of a “chelator-type” adenine mimic, which has two metal binding sites, and its ZnII–assisted self-assembly into a single-stranded coordination polymer are described. The UV absorption changes of a 1 : 1 mixture of the ZnII complex and a single-stranded DNA oligomer (dT)70 showed the temperature-dependent hyperchromic effect in an analogous manner as thermal denaturation processes of natural DNA duplexes.
Optically Active Cationic Cobalt(III) Complexes: Highly Efficient Catalysts for Enantioselective Hetero Diels–Alder Reaction
Authors: Kezuka Satoko , Mita Tsuyoshi , Ohtsuki Natsuki , Ikeno Taketo , Yamada Tohru
Published: November 2004

Optically active β-ketoiminato cobalt(III) complexes were developed for use as effective catalysts of the enantioselective hetero Diels–Alder reaction of aryl and alkyl aldehydes with 1-methoxy-[3-(tert-butyldimethylsilyl)oxy]-1,3-butadiene. In the presence of 5 mol% cationic cobalt(III) triflate complexes derived from optically active 1,2-bis(3,5-dimethylphenyl)-1,2-ethylenediamine, the hetero Diels–Alder reaction of p-nitro- benzaldehyde proceeded in 94% yield with 94% ee.
Synthesis of Cyclopentapeptides Using an Organophosphorus Reagent DEPBT
Authors: Tang Yan-Chun , Gao Xing-Ming , Tian Gui-Ling , Ye Yun-Hua
Published: November 2004

Two cyclopentapeptides cyclo(ProTyrLeuAlaGly)(1) and cyclo(AlaTyrLeuAlaGly)(2) isolated and identified from a Chinese medicinal herb were chosen as model cyclopeptides to evaluate a novel coupling reagent DEPBT (3-(diethoxy-phosphoryloxy-1,2,3-benzotriazin-4(3H)-one). DEPBT was used for synthesis of cyclic peptides in one-pot procedure. Compared with some other coupling reagents, the cyclization yields were satisfactory.
One-Step Synthesis of Terephthalic Acid from Benzene in Water Using Cyclodextrin as Catalyst
Authors: Shiraishi Yukihide , Tashiro Shigetoshi , Toshima Naoki
Published: November 2004

The one-pot synthesis of terephthalic acid from benzene has been achieved by treatment with tetrachloromethane, copper powder, and an aqueous sodium hydroxide solution using cyclodextrin as a catalyst at 30 °C under nitrogen in 46 mol% yield with 100% selectivity.
Vacuum-Ultraviolet Circular Dichroism Spectrophotometer Using Synchrotron Radiation: Optical System and Off-line Performance
Authors: Ojima Noriyuki , Sakai Kenichi , Fukazawa Tomoyuki , Gekko Kunihiko
Published: November 2004

With the aim of measuring the circular dichroism (CD) spectra of biomaterials in aqueous solutions in the vacuum ultraviolet region of 310–140 nm, the optical and sample cell system endurable under high vacuum was first constructed to be incorporated into the synchrotron radiation beam line as the light source. The performance of the present system was confirmed to be satisfactory in the high vacuum off-line experiment by monitoring the CD spectra of ammonium d-camphor-10-sulfonate aqueous solutions.
Carbon Dioxide Gas Sensing with the Combination of Divalent Magnesium Ion and Oxide Ion Conducting Solid Electrolytes
Authors: Imanaka Nobuhito , Yamamoto Takao , Adachi Gin-ya
Published: November 2004

The main gas species causing the global warming of the earth is carbon dioxide (CO2) and the human race must seek for the solution to suppress the continuous increase crisis of the CO2 concentration in the atmosphere. Here, two types of solid electrolytes were rigidly selected from their thermodynamic stability and reasonably high ionic conducting properties point of view to create the CO2 practical sensing performance.
Diastereoselective Pinacol Coupling Reaction of Aliphatic and Aromatic Aldehydes Promoted by Low Valent Titanium Iodide in situ Formed by Titanium(IV) Iodide and Copper
Authors: Mukaiyama Teruaki , Yoshimura Naritoshi , Igarashi Koji
Published: November 2004

The pinacol coupling reaction of aromatic and aliphatic aldehydes including pivalaldehyde with low valent titanium iodide, in situ formed from titanium iodide(IV) and copper, proceeded smoothly in a mixed solvent of dichloromethane and pivalonitrile to give the corresponding 1,2-diols in good to high yields and dl-selectivities.
A New Ceria-Zirconia Mixed Oxide Phase Based on Pyrochlore
Authors: Masui Toshiyuki , Ozaki Tetsuya , Adachi Gin-ya , Kang Zhenchuan , Eyring LeRoy
Published: November 2004

A new oxygen-rich ceria-zirconia pyrochlore phase has been produced by thermal decomposition of cerium-zirconyl oxalate in an argon flow and subsequent oxidation at 673 K for 2 h; it has been identified with high resolution electron microscopy.
Selenocarbonyl Analogues of Tetrathiafulvaleno-quinone(-thioquinone)-1,3-dithiolemethides as New Donor Molecules
Authors: Ueda Kazumasa , Kominami Tsuyoshi , Iwamatsu Masaki , Sugimoto Toyonari
Published: November 2004

Diethylthiotetrathiafulvalenoselenoquinone-1,3-dithiolemethide (1a) and -1,3-benzodithiolemethide (2a) were newly prepared as a donor molecule, which was colored blue in contrast to the corresponding thiocarbonyl- (1b and 2b) (green) and carbonyl-analogues (1c and 2c) (red). From comparison of their first redox potentials, 1a (2a) possesses almost the same electron-donating ability to 1b (2b) and 1c (2c). The reaction of 2a with P(n-Bu)3 afforded a coupled ylidene compound (3) albeit in low yield, which can be expected as another new donor molecule.