bluuebunny/crossref_metadata_2025 huggingface dataset:
Reductive Coupling of 2-Propyn-1-ones Promoted by Yb Metal or YbCl3–Zn
Authors: Takaki Ken , Nagase Kyoko , Beppu Fumikazu , Shindo Takaaki , Fujiwara Yuzo
Published: May 2006

Ytterbium metal promotes reductive coupling of 2-propyn-1-ones (1) to give cyclobutenes and 1,6-dioxo-2,4-hexadiene, whereas 1 is converted to 2,5-dihydrofurans on the treatment with YbCl3–Zn.
Mixed Oxide Capacitor of CuO–BaSnO3 as a Sensor for CO2 Detection over a Wide Range of Concentration
Authors: Ishihara Tatsumi , Kometani Kazuhiro , Mizuhara Yukako , Takita Yusaku
Published: May 2006

The mixed oxide capacitor, CuO–BaSnO3, exhibits high CO2 sensitivity. A monotonic and approximately logarithmic relationship exists between the sensitivity and the concentration of CO2 below 50%. The system, CuO–BaSnO3, is promising for sensing CO2 over a wide range of concentration.
Calixarene-Based Gelators of Organic Fluids
Authors: Aoki Masayoshi , Murata Kazutaka , Shinkai Seiji
Published: May 2006

We have found that 5,11,17,23,29,35,41,47-octadodecanoylcalix[8]arene-49,50,51,52,53,54,55,56-octol (28C12) serves as a novel gelator of organic fluids. The properties and the formation mechanism of the gels were investigated in detail by using spectroscopic, optical microscopic, and thermographic methods.
Enhancement of Lucigenin Chemiluminescence by Periodate Oxidation of Adrenaline in Cationic Surfactant Micelles
Authors: Kamidate Tamio , Kaneyasu Tetsutoshi , Segawa Tadashi , Watanabe Hiroto
Published: May 2006

Aqueous solutions of cationic micellar hexadecyltrimethylammonium hydroxide (CTAOH) containing periodate enhanced markedly the intensity of chemiluminescence (CL) emitted from the reaction of lucigenin with adrenaline (AD). Detection limit for AD was improved by factors of 20 compared to that in micellar CTAOH alone.
Enantioselective Hydrolysis of N-Acyl Amino Acid Esters by Tripeptide-type L-Histidine Derivative in a Bilayer Vesicular System
Authors: Ohkubo Katsutoshi , Ishida Hitoshi , Yamaki Kazuhiro , Kawata Masahiko
Published: May 2006

Peculiar enantioselective hydrolysis of N-acyl amino acid esters was found in the bilayer vesicular systems containing the tripeptide-type histidine derivative, Z-L-Leu-L-His-L-Leu. The enantioselectivity for the hydrolysis of long chain N-acyl phenylalanine p-nitrophenyl ester, C16-Phe-PNP, appeared in the binding process and was governed by an entropy factor.
5,5-Dialkyl-δ-valerolactone Derivatives as New Chirai Dopants for Ferroelectric Liquid Crystals
Authors: Sakashita Keiichi , Nakaoka Yuriko , Ikemoto Tetsuya , Terada Fumiko , Kageyama Yoshitaka , Shindo Mizuo , Mori Kenji
Published: May 2006

(S)-2-(4′-Octyloxybiphenyl-4-carboxy)-5,5-dipropyl-δ-valerolactone showed interesting properties as the chiral dopant for ferroelectric liquid crystals (FLCs). The FLC mixture containing only 2% by mol of this compound exhibited the magnitude of spontaneous polarization (Ps) as large as 9.6 nC/cm2 and the response time as fast as 75 μs at 25 °C in the electric field of ±5 V/μm.
Methyl-substituted Derivatives of 1,3,5-Tris(diphenylamino)benzene as a Novel Class of Amorphous Molecular Materials
Authors: Ishikawa Wataru , Inada Hiroshi , Nakano Hideyuki , Shirota Yasuhiko
Published: May 2006

Methyl-substituted derivatives of 1,3,5-tris(diphenylamino)benzene (TDAB) are found to show unique solid-state morphology, as characterized by differential scanning calorimetry and X-ray diffraction. These compounds readily form stable amorphous glasses having glass-transition temperatures of ca. 50 °C. p-Methyl-substituted TDAB exhibits polymorphism.
syn-Selective Michael Addition of Lithiated 2-Alkoxyacetates and -acetamides to α,β-Unsaturated Carbonyl Compounds
Authors: Kanemasa Shuji , Nomura Masafumi , Wada Eiji
Published: May 2006

The lithium Z-enolates derived from 2-alkoxyacetates and -acetamides undergo unusual syn-selective Michael addition to α,β-unsaturated carbonyl compounds, where the syn selectivity of the amide enolates is much higher than that of the ester enolates. Factors that influence the stereoselectivity are also discussed.
A New Synthesis of Hindered Unsymmetrical t-Alkyl Ethers
Authors: Masada Hiromitsu , Gotoh Hidenori , Ohkubo Makoto
Published: May 2006

The unusual Williamson reactions of t-butyl and t-pentyl halides with lithium t-alkoxides or with t-alkyl alcohols and amines were carried out at 20–50 °C. Some of the nucleophilic substitution products were new unsymmetrical ethers: t-butyl t-pentyl ether, t-butyl 1,1-dimethyl-2-propenyl ether, t-butyl 1,1-dimethyl-2-propynyl ether, 1,1-dimethyl-2-propynyl t-pentyl ether, and t-butyl 1-ethyl-1-methyl-2-propynyl ether.
Water Vapor Influence on Carbon Dioxide Detection of the Sensor Based on Lithium Conducting Solid Electrolyte
Authors: Imanaka Nobuhito , Kawasato Takeshi , Adachi Gin-ya
Published: May 2006

The influence of the water vapor on the CO2 selectivity of the sensor based on a lithium ionic conductor has been investigated. In a CO2 gas concentration higher than 1000 ppm, the sensor was able to detect the CO2 content continuously even when the vapor coexisted up to 222.8 g/m3. In a CO2 concentration lower than 1000 ppm, EMF deviated lower with the increase of the water vapor content. This might be attributed to the lithium hydroxide formation on the solid electrolyte surface by the chemical reaction between the Li2CO3+Li2O electrode and water vapor in the atmosphere.
Design for Separation of Indium(III) from Gallium(III) by Chelate Extraction on the Basis of HSAB Rule
Authors: Kawamoto Hiroshi , Nishimura Tohru , Tsunoda Kin-ichi , Akaiwa Hideo
Published: May 2006

A method for design of separation scheme of InIII from GaIII by chelate extraction was proposed on the basis of HSAB rule, which predicted that dithizone would be the most effective for the separation among various chelating agents. This prediction was confirmed through experiments.
Li+ Ion Selective Transport by Crownophanes
Authors: Inokuma Seiichi , Katoh Reiko , Yamamoto Takamasa , Nishimura Jun
Published: May 2006

Crownophanes, which were easily prepared by photocycloaddition, exhibited high Li+ ion selectivity on the competitive passive transport in the presence of dodecanoic acid as a co-carrier.
Volume Changes Accompanying the Stepwise Complex Formation in Aqueous Solutions. Cu(II)–bpy Complexes
Authors: Kawaizumi Fumio , Burkov Kim A
Published: May 2006

Densities of aqueous solutions containing copper nitrate and bpy (bpy = 2,2′-bipyridine) were measured to evaluate the partial molar volumes of [Cu(bpy)]2+, [Cu(bpy)2]2+, and [Cu(bpy)3]2+. Volume increments by coordination of bpy were determined for each step and were analyzed.
Gas Sensing Characteristics of Superconducting Cuprates
Authors: Grantscharova Emilia , Raju Addepalli R , Rao C N Ramachandra
Published: May 2006

Gas sensing characteristics of YBa2Cu3O7−δ, La2−x SrxCuO4, and Bi2Y1−xCaxSr2Cu2O8 have been examined. La2−x SrxCuO4 (x = 0.075), and Bi2YSr2Cu2O8 are found to show good sensitivity (≈10 ppm) to ethyl alcohol and such vapours.
Structures of Bacteriochlorophyll c’s in Chlorosomes from a New Thermophilic Bacterium Chlorobium tepidum
Authors: Nozawa Tsunenori , Ohtomo Katsunori , Suzuki Manabu , Morishita Yumi , Madigan Michael T
Published: May 2006

A new thermophilic bacterium Chlorobium tepidum contained two major bacteriochlorophyll c components whose periphery substituent at 4-position was either an ethyl or a propyl group. Both components possessed ethyl groups at 5-position and the ester alkyl groups at 7-position were farnesyl groups.
Photochemistry of Conj ugated Polyacetylenes. Photoreaction of 1,4-Diphenyl-1,3-butadiyne with Unsymmetrical Olefins
Authors: Shim Sang Chul , Lee Sang Jin , Kwon Jang Hyuk
Published: May 2006

Irradiation of 1,4-diphenyl-1,3-butadiyne (DPB) with unsymmetrical olefins such as acrylonitrile and ethyl vinyl ether yields regiospecific 1:1 and 1:2 photoadducts. The reactive site on the formation of 1:2 photoadducts is different from each other indicating that the reaction proceeds through polar excited states.
Novel Initiators Having Acetylene Group for Polymerization of 2-Oxazolines
Authors: Kobayashi Shiro , Uyama Hiroshi , Mori Toshild , Narita Yutaka
Published: May 2006

Propagylic halide type compounds such as propagyl bromide, 1,4-dibromo-2-butyne, and 1,6-dibromo-2,4-hexadiyne, were used for the polymerization of 2-oxazolines. The polymerization initiated by these initiators gave polymers with narrow molecular weight distribution. From kinetic study, the polymerization using these initiators is found to be a relatively fast initiation system.
Synthesis of Monoselenoacetals Using Diisobutylaluminium Benzeneselenolate
Authors: Nishiyama Yutaka , Nakata Shinji , Hamanaka Sawako
Published: May 2006

Monoselenoacetals can be synthesized from the reaction of acetals with diisobutylaluminium benzeneselenolate (i-Bu2AlSePh) under mild conditions in good yields. Diselenoacetals are also obtained by treating acetals with large excess amount of i-Bu2AlSePh.
α-Nitronyl Nitroxide Cation Radicals
Authors: Awaga Kunio , Inabe Tamotsu , Nagashima Umpei , Nakamura Takayoshi , Matsumoto Mutsuyoshi , Kawabata Yasujiro , Maruyama Yusei
Published: May 2006

X-Ray crystal analysis and magnetic measurements have been carried out on the first cation radical salt of α-nitronyl nitroxide, 2-(4-N-R-pyridinium)-4,4,5,5-tetrametyl-4,5-dihydro-1H-imidazol-1-oxyl 3-N-oxide iodide (with R = methyl (1) and ethyl), suggesting the separation between the spin and the charge density population, and revealing the strong antiferromagnetic intermolecular interaction of JAF/kB = 149 K in 1.
Meisenheimer Rearrangement of 2-Ethyl-1,4,5,10b-tetrahydro-2H-azetopyrido[3,4-b]indole N-Oxides. Formation of 3,6-Epoxy-1,2,3,4,5,6-hexahydroazocino[5,6-b]indoles
Authors: Kurihara Takushi , Ohuchi Kaori , Kawamoto Mitsuko , Harusawa Shinya , Yoneda Ryuji
Published: May 2006

Oxidation of 2-ethyl-1-methoxycarbonyl-1,4,5,10b-tetrahydro-2H-azetopyridoindole with m-chloroperbenzoic acid (mCPBA) at room temperature gives 3,6-epoxyhexahydroazocino[5,6-b]indole via Meisenheimer rearrangement of the intermediate N-oxide. On the other hand, oxidation of the corresponding 1-hydroxymethyl derivative forms the cis-N-oxide which then undergoes rearrangement at 55 °C in THF to yield a mixture of azocino[5,6-b]indole and N-hydroxytetrahydro-β-carboline.
Total Syntheses of Batzelline C and Isobatzelline C, the Novel Pyrroloquinoline Alkaloids Isolated from the Marine Sponge Batzella Sp.
Authors: Tao Xue Liang , Nishiyama Shigeru , Yamamura Shosuke
Published: May 2006

Total syntheses of batzelline C and isobatzelline C, two chlorine-containing alkaloids have been successfully accomplished employing the tricyclic indole derivative as a key intermediate.
Highly Regioselective Ring Opening of 2,3-Epoxy Alcohol Methanesulfonates
Authors: Gao Lian-xun , Saitoh Hitoshi , Feng Fei , Murai Akio
Published: May 2006

Reaction of 2,3-epoxy-1-ol methanesulfonates with diethylaluminum chloride or with the mixture of diethylaluminum chloride and diethylamine hydrobromide in dichloromethane gave rise to regioselectively the corresponding 3-chloro- and 3-bromo-1,2-diol 1-methanesulfonates, respectively, in excellent yields.
In Situ Lateral Photoconductivity of C60/C70 Thin Films during and after Vacuum Vapor Deposition
Authors: Minami Nobutsugu
Published: May 2006

Lateral photoconductivity was measured during and after vacuum vapor deposition of carbon cluster (C60/C70) thin films. A slight change of slope in a photocurrent increase curve during the thin film deposition suggests the formation of a monomolecular layer of carbon clusters. Photocarrier generation efficiency is found to be higher at an absorption structure around 600 nm.
Monocyclic Rod-Type Liquid Crystals, 2-(2-Alkenoyloxy)-5-alkoxytropones
Authors: Mori Akira , Mori Ryoji , Takeshita Hitoshi
Published: May 2006

In 2-(2-alkenoyloxy)-5-alkoxytropones, showing a monotropic smectic A phase, the introduction of a double bond lowers the melting and clearing points as well as the recrystallization temperatures.
A Catalytic Asymmetric Synthesis of Cyclopentanoids via π-Allylpalladium Complexes
Authors: Mori Miwako , Nukui Seiji , Shibasaki Masakatsu
Published: May 2006

A catalytic asymmetric alkylation of cyclopentene diol derivatives was achieved by use of Pd(OAc)2-(S)-BINAPO to give corresponding cyclopentanoids in up to 57% ee.
Morphological Transformation of Solubilization Process of Large Unilamellar Vesicle by a Nonionic Detergent, Octyl Glucoside
Authors: Ueno Masaharu , Akechi Yoko
Published: May 2006

Solubilization process of large unilamellar vesicles was characterized by 5 stages; (1) simple incorporation of detergents into the membrane; (2) appearance of convex and concave on the membrane surface; (3) closing of the convex and concave resulting in formation of small vesicles; (4) dispersion or aggregation of the small vesicles; (5) solubilization of the small vesicles resulting in formation of mixed micelles.
Oxidation of 1,2-Bis(phenylseleno)-1-alkenes. A Novel Example of Selenoxide anti-Elimination
Authors: Ogawa Akiya , Sekiguchi Masahito , Shibuya Hiroaki , Kuniyasu Hitoshi , Takami Noriaki , Ryu Ilhyong , Sonoda Noboru
Published: May 2006

The oxidation of 1,2-bis(phenylseleno)-1-alkenes and the reactivity of thus formed selenoxides have been investigated. When (Z)-1,2-bis(phenylseleno)-1-octene was oxidized with two equivalents of MCPBA, a novel selenoxide anti-elimination has been found to take place at or below room temperature.
Molecular Recognition by Steroid Cyclophane in Aqueous Solution and Synthetic Bilayer Membrane
Authors: Kikuchi Jun-ichi , Matsushima Chiemi , Suehiro Kazuaki , Oda Rie , Murakami Yukito
Published: May 2006

A novel host named “steroid cyclophane,” a tetraaza[3.3.3.3]paracyclophane with four steroid moieties, was prepared, and its ability to recognize 8-anilinonaphthalene-1-sulfonate, a typical anionic guest with hydrophobic character, in aqueous media was examined in the presence and absence of synthetic bilayer membranes.
Citreohybriddiones A and B and Related Terpenoids, New Metabolites of a Hybrid Strain KO 0031 Derived from Penicillium citreo-viride B. IFO 6200 and 4692
Authors: Kosemura Seiji , Matsunaga Kimihiro , Yamamura Shosuke
Published: May 2006

Four new high potent antifeeding substances, citreohybriddiones A and B and isocitreohybridones A and B, have been isolated from the mycelium of a hybrid strain KO 0031 derived from Penicillium citreo-viride B. IFO 6200 and 4692. Their stereostructures have also been elucidated on the basis of their spectral data and some chemical evidence.
Stereoselective and Rapid Synthesis of D-Mannose
Authors: Nishimura Shintaro , Hayashi Nobuyoshi
Published: May 2006

During the course of our studies on labeling reactions with tracer elements, a new rapid and stereoselective synthesis of D-mannose was found. Reaction of 2,3:4,5-di-O-isopropylidene-D-arabinose with trimethylsilylcyanide and zinc iodide in dichloromethane followed by reduction gave D-mannose in good yield.
Catalytic Monooxygenation of Saturated Hydrocarbons with O2 by a Nonheme Mono-Iron Complex Using Hydroquinones as Reductants
Authors: Funabiki Takuzo , Ishida Hiroyuki , Yoshida Satohiro
Published: May 2006

Saturated C–H bonds in hydrocarbons are readily monooxygenated with O2 to alcohols and ketones by a catecholatoiron complex in acetonitrile in the presence of pyridine and hydroquinones as reductants. The pyridine concentration was found to be important for controlling the reactivity and selectivity of products, promoting the formation of alcohols and ketones in the low and high pyridine concentrations, respectively.
Microbial Hydrolysis of 3-Substituted Glutaronitriles
Authors: Kakeya Hideaki , Sakai Naoko , Sano Akio , Yokoyama Masahiro , Sugai Takeshi , Ohta Hiromichi
Published: May 2006

Rhodococcus butanica ATCC 21197 preferentially hydrolyzed pro-S cyano group of 3-substituted glutaronitriles with an aromatic ring. A product with high e.e. (>99%) was obtained from 3-benzoyloxy derivative.
A Novel Hydrodechlorinative Dimerization of Chlorofluorocarbons over Supported Ni Catalysts
Authors: Tomioka Satoshi , Mori Tohru , Ueda Wataru , Morikawa Yutaka , Ikawa Tsuneo
Published: May 2006

1,1,1-Trichloro-2,2,2-trifluoroethane or 1,1-dichloro-1,2,2,2-tetrafluoroethane, both of which have CF3 group, dimerizes over supported Ni catalysts at an elevated temperature (723 K) into corresponding C4-compounds in good to moderate yields.
Observation of the Triple Cation Formation from Substituted-Benzoate Ions in Acetonitrile by Spectrophotometry
Authors: Hojo Masashi , Tanio Atsuhiro , Miyauchi Yoshihiro , Imai Yoshihiko
Published: May 2006

For 2,4-dinitrobenzoate ion (A−) in acetonitrile, the ion pair (Li+A−) and the triple cation ((Li+)2A−) formation constants were obtained by distinct changes of UV absorption spectra with increasing concentration of LiClO4.
Fixation of Heteropoly Anion on TiO2 Modified with a Silane Coupling Agent
Authors: Kamada Masahiko , Kera Yoshiya
Published: May 2006

12-tungstophosphate anion (PW12) was effectively fixed on TiO2 chemically modified with γ-anilinopropyl-trimethoxysilane (AnPS). The fixation was confirmed by FT-IR spectroscopy to be caused by the interactions between the functional group of AnPS and the surface OH group on TiO2 and the bridge oxygen ion in the PW12-Keggin unit.
Formation of Proton Gradients in Electron Transport between Two Proton-Conducting Acetonitrile Phases Separated by an Insulating Carbon Disulfide Phase
Authors: Fukuzumi Shunichi , Yorisue Tomohiro
Published: May 2006

Proton gradients are formed efficiently, coupled with electron transport from iodide ion to electron acceptors (quinone, nitrite, and dioxygen) between two acetonitrile phases, which are separated by a proton-insulating CS2 phase, by using ferrocenium ion as an electron carrier.
Enhancement of Separation Efficiency in a Dysprosium(III) and Erbium(III) Pair by the Combination of a Chelating Resin with a Selective Complexing Agent
Authors: Kanesato Masatoshi , Kooptarnond Kalayanee , Suzuki Toshishige M
Published: May 2006

The enhancement of separation efficiency in Dy(III) and Er(III) pair has been observed by the combination of a chelating resin having amine-N-acetates group with a solution of α-hydroxyisobutyric acid (HIBA). A favorable separation of Dy/Er was attained by use of the chelating resin as a column stationary phase and HIBA as an eluent.
Carbon Dioxide Fixation by Electrolysis of Aqueous Hydrogencarbonate Solution. Reduction to Formic Acid at a Mercury Cathode
Authors: Fujiwara Hiroki , Konno Akinori , Nonaka Tsutomu
Published: May 2006

Carbon dioxide liberated by introduction of anodically-generated acid into an aqueous cathodic solution of sodium hydrogencarbonate was efficiently (65% current efficiency) reduced to formic acid at a mercury cathode in a divided cell with a cation-exchanging membrane.
A Facile and Selective 1,2-Reduction of Conjugated Ketones with NaBH4 in the Presence of CaCl2
Authors: Fujii Hideaki , Oshima Koichiro , Utimoto Kiitiro
Published: May 2006

CaCl2 ia an efficient catalyst for the regioselective 1,2-reduction of α-enones with NaBH4 in methanol solution.
Observation of Metallic Conductivity and Sharp Superconducting Transition at 19 K in Potassium-Doped Fulleride, C60, Single Crystal
Authors: Maruyama Yusei , Inabe Tamotsu , Ogata Hironori , Achiba Yohji , Suzuki Shinzo , Kikuchi Koichi , Ikemoto Isao
Published: May 2006

The first observation of a “metallic” conductivity behavior by resistivity measurements is reported for a potassium-doped C60 single crystal. The superconducting transition takes place very sharply with about one degree temperature width, that is, the onset of Tc is 20 K and the resistivity becomes null at 19 K. The details of the doping process are described.
Temperature Dependence of the Light-Induced Infrared Difference Spectra of Chromatophores and Reaction Centers from Rhodobacter sphaeroides
Authors: Morita Eugene Hayato , Hayashi Hidenori , Tasumi Mitsuo
Published: May 2006

The light-induced infrared difference spectra have been measured for chromatophores (intracytoplasmic membranes containing reaction centers) and isolated reaction centers from Rhodobacter sphaeroides at 300 and 80 K. Analysis of the C9 keto carbonyl stretching region suggests that the radical cation of the bacteriochlorophyll-a special pair formed after photoexcitation might have multiple structures which differ in the degree of delocalization of an unpaired electron.
35Cl NQR Study of N,N′-Dichloro-5,5-dimethylhydantoin and Related Compounds
Authors: Nagao Yoshitaka , Katagiri Shigeyoshi
Published: May 2006

The 35Cl NQR frequencies of N,N′-dichloro-5,5-dimethylhydantoin were assigned in comparision with those of N-chloro-α,α-dimethylsuccinimide and N-chloro-4,4-dimetyl-2-oxazolidone. It turned out monochloro-5,5-dimethylhydantoin was a 1-chloro derivative
A Remarkable Increment in Catalytic Activity of SiO2–Al2O3 by Copper Addition for Selective Reduction of Nitrogen Monoxide by Ethene in Oxidizing Atmosphere
Authors: Hosose Hironobu , Yahiro Hidenori , Mizuno Noritaka , Iwamoto Masakazu
Published: May 2006

The addition of 3.3–3.7 wt% copper resulted in the great increment in the catalytic activity of the parent SiO2–Al2O3 for the title reaction in the wide temperature region 573–900 K.
Chelation Control in the Aldol Reaction of Tetronic Acid. Application to the Synthesis of Pentoses, Arabitol and Ribitol
Authors: Honda Toshio , Hayakawa Tomohisa , Kondoh Hirotsune , Okuyama Akihiko , Tsubuki Masayoshi
Published: May 2006

The aldol reaction of lithium enolates of tetronates with (R)-2,3-O-cyclohexylideneglyceraldehyde afforded the chelation controlled products stereoselectively. The conversion of the aldol products into arabitol and ribitol was also described.
Unexpected Effects of Seed Polymer on the Porous Structures of Poly(methyl methacrylate-ethylene glycol dimethacrylate) Particles
Authors: Hosoya Ken , Kishii Yutaka , Tanaka Nobuo , Kimata Kazuhiro , Maruya Satoshi , Araki Takeo , Fréchet Jean M J
Published: May 2006

Size monodispersed poly(methyl methacrylate-ethylene glycol dimethacrylate) packing materials were prepared by a multi-step swelling and polymerization method with cyclohexanol or toluene as porogenic solvent. When toluene was applied as a porogen, the seed polymer severely affected the porous structure, while no effect was observed with cyclohexanol compared chromatographically with those prepared by the corresponding suspension polymerization methods.
Behavior of Triphenylethylene Dianion in Diethyl Ether Solution
Authors: Yokoyama Yukihiro , Kikuchi Osamu
Published: May 2006

The temperature-dependent 13C NMR spectra have been observed for triphenylethylene dianion in diethyl ether. The analyses of spectral changes with temperatures reveal that the geminal phenyl rotations have differential rates and that the rotations are affected by rotational motion about the ethylenic Cα-Cα′ bond in the solution.
Photo-Initiated Amine-Formation in a Polymer Matrix and Its Application to Thermal Cross-Linking of Poly(Glycidyl Methacrylate) Films
Authors: Ito Ken-ichi , Nishimura Masamichi , Sashio Minoru , Tsunooka Masahiro
Published: May 2006

Photolysis of an O-acyloxime in a polymer solid was applied to thermal cross-linking of poly(glycidyl methacrylate) films.
Neodymium-Catalyzed Dehydrogenative Condensation of Methylsilane and Ceramization of the Resulting Polymer
Authors: Kobayashi Toshi-aki , Sakakura Toshiyasu , Hayashi Teruyuki , Yumura Morio , Tanaka Masato
Published: May 2006

High molecular weight poly(methylsilylene) is obtained in a good yield through dehydrogenative condensation of methylsilane catalyzed by (C5Me5)2NdCH(SiMe3)2. At a high temperature, polymerization process involves cross-linking via the loss of methane. Pyrolysis of the resulting polymer gives β-SiC in a high yield. Blend with a carbon-rich polymer like poly(phenylsilylene) is effective to prevent the formation of contaminative metallic silicon during ceramization.
Acceleration of the Fluorination of Benzyl Halide by the Combination of Lead Fluoride and Sodium Salt
Authors: Ichihara Junko , Hanafusa Terukiyo , Takai Yoshio , Ito Yoshiaki
Published: May 2006

A new composite reagent, a combination of lead fluoride (PbF2) and a small amount of sodium salt (NaX, X = F, Br etc.) was found to be useful for facilitating heterogeneous fluorination of substituted benzyl halides in acetonitrile.
Direct Observation of Photoinduced Charge Separation Dynamics in Solid Poly(N-vinylcarbazole) Powders by Diffuse Reflectance Laser Photolysis
Authors: Koshioka Masanori , Ikeda Noriaki , Itaya Akira , Masuhara Hiroshi
Published: May 2006

Transient absorption spectra of poly(N-vinylcarbazole) powders doped with some electron acceptors are composed of the bands of acceptor anion and carbazole cation, indicating directly charge separation from the excited state. Electronic structure and decay processes of polymer cation are considered and compared with transparent film.
Unique Stereocontrol in Europium(III)-Catalyzed Cyanosilylation of Chiral α-Alkoxy and α-Amino Aldehydes
Authors: Gu Jin-Hua , Okamoto Mikako , Terada Masahiro , Mikami Koichi , Nakai Takeshi
Published: May 2006

The Eu(III)-catalyzed cyanosilylations of chiral α-alkoxy and α-amino aldehydes are shown to exhibit syn diastereofacial selection, the degree increasing with an increase in steric bulk of the alkyl chain in the aldehydes. The mechanism of this catalytic process is discussed.
Preparation of Novel σ-Bonded Organozirconium(IV) Porphyrins and Photoreduction to the Zirconium(II) Complex by Visible Light
Authors: Shibata Kenji , Aida Takuzo , Inoue Shohei
Published: May 2006

Reaction of (5,10,15,20-tetraphenylporphinato)zirconium diacetate ((TPP)Zr(OAc)2) with organo-lithium or -magnesium compounds gave the corresponding σ-bonded organozirconium(IV) porphyrins ((TPP)ZrR2, R = Me, Et, n-Bu, and Ph). Irradiation of (TPP)ZrMe2 with visible light resulted in a clean generation of the low-valent zirconium(II) porphyrin complex.
Thermocatalytic Dehydrogenation of Cyclooctane with Heterogenized Trinuclear Ruthenium Cluster Complex
Authors: Yukawa Kiyoshi , Kanaboshi Haruo , Saito Yasukazu
Published: May 2006

Heterogenized ruthenium cluster, prepared thermally from Ru3(CO)12 and high-surface active carbon in cyclohexane, exhibited catalytic activity for cyclooctane dehydrogenation under boiling and refluxing conditions (13.6 turnovers/Ru-metal (24 h)). A half of the CO ligands was resided as [Ru(CO)2X2]n according to IR spectroscopy. The catalytic role of the trinuclear cluster dispersed on the carbon support is discussed on reference to fitness of its molecular size with the micropore diameter.
Effect of the Chemical Modification by Viologen on the Reduction of Metmyoglobin
Authors: Tsukahara Keiichi , Todorobaru Hiromi
Published: May 2006

Metmyoglobin covalently linked with viologen was prepared and reduced by dithionite ions faster than the native metmyoglobin, suggesting that the reduction by dithionite of the attached viologen was followed by a rapid intramolecular electron transfer from the viologen radical cation to the heme iron center.
CuBr2–LiOBut as a New Reagent for Oxidation of Alcohols
Authors: Yamaguchi Jun-ichi , Yamamoto Shiori , Takeda Takeshi
Published: May 2006

The reagent of the title was found to promote the oxidation of alcohols to give the corresponding carbonyl compounds in good yields. The copper(II) oxidizing agent was easily prepared by the reaction of copper(II) bromide with lithium t-butoxide in THF.
Synthesis of Poly(p-[α-(N-t-butylnitronyl)]styrene) and Its Reactivity with Nitrogen Dioxide
Authors: Ren Jingzhu , Sakakibara Kazuhisa , Hirota Minoru
Published: May 2006

Poly(p-[α-(N-t-butylnitronyl)]styrene) (polyPBN) has been prepared by using p-chlorostyrene as a starting material. The reaction of polyPBN with nitrogen dioxide (NO2) and its efficiency for radical trapping were studied. The stability of NO2 adduct of polyPBN and operational simplicity to recover polyPBN showed that polyPBN is applicable to the removal of NO2 in atmosphere.
A Facile Workup-Free Catalytic Rearrangement of Epoxides on Immobilized Organoaluminum Columns
Authors: Nagahara Shigeru , Maruoka Keiji , Yamamoto Hisashi
Published: May 2006

The immobilized organoaluminum columns can be successfully utilized as a workup-free reactor for the catalytic rearrangement of various epoxides to carbonyl compounds.
Location of Catalytic Head Group of 2-Hydroxymethylimidazole·Cu2+ Complex on the Micellar Surface of Anionic SDS in the Hydrolysis of p-Nitrophenyl Picolinate
Authors: Ogino Kenji , Yoshida Toshiharu , Yamamoto Hiroaki , Tagaki Waichiro
Published: May 2006

Five cationic surfactants, each having a 2-hydroxymethylimidazole moiety which is connected to ammonium nitrogen with a spacer group of (CH2)m and co-micelled with a non-functional surfactant, have been examined for their catalytic activities for the hydrolysis of p-nitrophenyl picolinate. They were highly active in the presence of Cu2+ and the activity increased with increasing methylene number in the order m = 3 < 4 < 6.
Reaction of 3-Methyl-2-cyclopenten-1-one N,N-Dimethylhydrazone with α,β-Unsaturated Carbonyl Compounds. A Novel Synthesis of Bicyclic Compounds
Authors: Matsumiya Kaoru , Guo Yan Ping , Yamashita Masakazu
Published: May 2006

3-Methyl-2-cyclopenten-1-one N,N-dimethylhydrazone reacted with methyl vinyl ketone or acrylic acid derivatives to give a new bicyclic bifunctional compound in good yield in a polar aprotic solvent such as dimethylformamide.
Two-Photon Ionization of Naphthacene in Hexane Excited by an Argon Ion Laser
Authors: Kawazumi Hirofumi , Isoda Yuji , Ogawa Teiichiro
Published: May 2006

A continuous wave laser can induce two-photon ionization in solution. The conductivity signals of naphthacene in hexane excited by the 458-nm line of an argon ion laser were quadratically proportional to the laser power and linearly proportional to the solute concentration, indicating a two-photon process.
Carbon Isotope Compositions of Graphite and Carbonate in 3.8 × 109 Years Old Isua Rocks
Authors: Shimoyama Akira , Matsubaya Osamu
Published: May 2006

The graphite from the eastern and western belts of the Isua supracrustals showed the δ13C values in a narrow range from −8.0 to −10.9‰, while the contents of the graphite vary in the rocks. Carbonates in the separate rocks gave the values between −5.0 and −5.6‰. These values are of the oldest terrestrial materials available.
Total Synthesis of (+)-Asperlin Starting with (S,S)-Tartaric Acid
Authors: Masaki Yukio , Imaeda Toshihiro , Oda Hirohisa , Itoh Akichika , Shiro Motoo
Published: May 2006

Natural (+)-asperlin was synthesized stereoselectively starting with (S,S)-tartaric acid by way of the 6,8-dioxabicyclo[3.2.1]octane skeleton.
A Facile Synthesis of Cyclohepta[a]thieno[c]naphthalenylium Ions. Intramolecular Cyclization of o-Thienylcycloheptatrienylbenzenes
Authors: Yamamura Kimiaki , Miyake Hideyoshi , Nakatsuji Shin’ichi , Murata Ichiro
Published: May 2006

The intramolecular Friedel-Crafts type reaction of o-thienylcycloheptatrienylbenzenes in one pot reaction has allowed the construction of title compounds having new 18 π-electron systems with the isoelectronic structure of triphenylene.
New Simple Cell for In-situ Fluoroelectrochemical Measurements
Authors: Taniguchi Isao , Fujiwara Tadao , Tominaga Masato
Published: May 2006

A simple cell for in-situ measurements of fluorescence of species in solution during an electrode reaction was prepared for the first time. The spectroelectrochemical cell was characterized by using the redox reaction of riboflavin. A new technique named derivative cyclic voltafluorometry (DCVF) was also demonstrated.
Amperometric-Type Sensor for CO2 Using BaCeO3-Based Ceramic
Authors: Hibino Takashi , Iwahara Hiroyasu
Published: May 2006

The resistivity of BaCe0.95Y0.05O3−x ceramic element was very sensitive to CO2 in the moisten atmosphere at 923 K. The reproducible linear relationship between the resistivity and the CO2 concentration was observed in the range of 200–3000 ppm.
BaCeO3-Based Protonic Conductor Sensitive to Ethanol
Authors: Hibino Takashi , Iwahara Hiroyasu
Published: May 2006

A new type of potentiometric-type sensor for ethanol was constructed using proton conductive ceramic BaCe0.95Y0.05O3−x as a solid electrolyte. The sensing mechanism was discussed by measuring the reactivity of ethanol.
Generation of Cation Radicals from 2-Tributylstannyl-1,3-dithianes and Their Reaction with Olefins
Authors: Narasaka Koichi , Okauchi Tatsuo , Arai Noriyoshi
Published: May 2006

Oxidation of 2-tributylstannyl-1,3-dithianes with metallic oxidants generates reactive species such as 1,3-dithian-2-yl radical and/or cation by eliminating the stannyl group. Those intermediates react with olefins to give the intermolecular addition products.
Synthesis and Properties of Naphtho[1,8-bc:4,5-b′c′]dithiophene as a Novel Heterocyclic Electron Donor
Authors: Watanabe Kazunori , Aso Yoshio , Otsubo Tetsuo , Ogura Fumio
Published: May 2006

The title heteroarene isoelectronic with pyrene was prepared via [2.2](2,4)thiophenophane-1,8-diene, forming electrically conductive complexes with 2,3-dichloro-5,6-dicyano-p-benzoquinone or iodine.
Generation and Intramolecular Cycloaddition of o-Quinonemethides in Protic Solvent. An Efficient Synthesis of (−)-trans-Hexahydrocannabinol
Authors: Lu Zhan Guo , Sato Naoki , Inoue Seiichi , Sato Kikumasa
Published: May 2006

A very facile and efficient synthesis of (−)-trans-hexahydrocannabinol was achieved through the intramolecular Diels-Alder reaction of an o-quinonemethide derived from 2-(1-hydroxycitronellyl)olivetol 1,3-bismethoxymethyl ether in methanol.
Isolation and Structures of Cropapine and Cronupapine, New Glucosides from Cronura Papirio
Authors: Mochizuki Keiko , Shizuri Yoshikazu , Kosemura Seiji , Miyoshi Eiichi , Yamamura Shosuke
Published: May 2006

Two new glucosides, cropapine and cronupapine, have been isolated from the plant Cronura papirio and their structures have also been elucidated on the basis of their spectral data coupled with some chemical evidence.
Plasma Nitriding Characteristics of Sm2Fe17Nx
Authors: Machida Ken-ichi , Yamamoto Eiji , Murase Kuniaki , Adachi Gin-ya , Taniguchi Masahiro , Tanaka Ken-ichi
Published: May 2006

Nitriding characteristics of Sm2Fe17Nx were studied by applying a plasma technique to Sm2Fe17 in a stream of N2-H2 mixed gas. The reaction took place even at room temperature, but the formation of nitride was limited around the surface region. Some mild heating was required to realize the well-nitriding up to bulk level.
Stereospecific Electrochemical Oxidation of NAD(P)H Analogs Mediated by Radical Cation of Anilines
Authors: Okamura Mutsuo , Kashiwagi Takeshi , Mikata Yuji , Yamazaki Norimasa , Ohno Atsuyoshi
Published: May 2006

Net hydrogen-atom (H•) transfer was observed in electrochemical oxidation of NAD(P)H analogs in the presence of aniline or its derivatives. The reaction mechanism is discussed on the basis of stereospecificities.
X-Ray Molecular Structure of [NBun4]2[Mo(C3S5)3] and Electrical Conductivities of the Oxidized Species
Authors: Matsubayashi Gen-etsu , Douki Katsuji , Tamura Hatsue
Published: May 2006

A reaction of MoCl5 with Na2C3S5 in acetonitrile afforded the title complex. The X-ray crystal structure analysis revealed the geometry of the anion with a distorted trigonal prismatic coordination. The partially oxidized complex [NBun4]0.3[Mo(C3S5)3] has the electrical conductivity of 0.15 S cm−1 at room temperature (compacted pellet).
A New Enantioselective Synthesis of the Aminodihydroisocoumarin Moiety of AI-77-B
Authors: Kotsuki Hiyoshizo , Miyazaki Aya , Ochi Masamitsu
Published: May 2006

The aminodihydroisocoumarin moiety of AI-77-B, a gastroprotective substance isolated from Bacillus pumilus AI-77, has been prepared from a convenient chiral synthon of L-erythrose by combination of chiral triflate technology and regioselective aromatic carboxylation.
Design and Synthesis of Highly Specific and Selective Enkephalin Analog Containing S-Npys-Cysteine for δ Opioid Receptors
Authors: Matsueda Rei , Yasunaga Teruo , Kodama Hiroaki , Kondo Michio , Costa Tommaso , Shimohigashi Yasuyuki
Published: May 2006

Enkephalin analogs containing S-(3-nitro-2-pyridinesulfenyl)cysteine at positions of 1,5, or 6 were synthesized for searching possible thiol groups in the opioid receptors. In the radio-ligand receptor assay and biological assays, [D-Ala2, Leu5]enkephalyl-Cys(Npys)6 exhibited a very high affinity and selectivity for δ over μ receptors, and its covalent attachment to δ receptors through the disulfide bonding was evidenced.
A Quantitative Scale for the Structural Effect on Reactivity toward Nucleophilic Displacement at Silicon
Authors: Shimizu Nobujiro , Takesue Naohide , Yamamoto Akiko , Tsutsumi Toru , Yasuhara Sigefumi , Tsuno Yuho
Published: May 2006

The rates of solvolysis for forty different triorganochlorosilanes have been measured in 89 mol% aqueous dioxane at 25 °C; the logarithmic rates relative to that for trimethylchlorosilane, logkrel = log [kR1R2R3SiCl)/k(Me3SiCl)], provide a quantitative scale for the structural effect of various silyl groups on the reactivity toward nucleophilic displacement at silicon, ranging from 1.99 for HSiMe2 to −6.89 for t-BuSiPh2 groups.
Catalytic Activity of m-Phenylene- and 2,6-Pyridinediyl-linked Manganese Porphyrin Dimers. Role of Nitrogen Bases on the Development of Catalase Activity
Authors: Naruta Yoshinori , Sasayama Masa-aki , Maruyama Kazuhiro
Published: May 2006

Catalase activity of m-phenylene-linked manganese porphyrin dimer was measured in the presence of various nitrogen bases. The catalase activity was dependent upon the the basicity as well as the concentration of the additive nitrogen bases where formation of the corresponding five-coordinated manganese species was less favorable. Deprotonation of hydrogen peroxide is the key step in the development of catalase activity.
Ion-Exchange Properties of Li Ion Conductor, LiTixZr2−x(PO4)3
Authors: Mizuhara Yukako , Hachimura Katsutoshi , Ishihara Tatsumi , Kubota Naoji , Hano Tadashi , Hori Fumiaki , Takita Yusaku
Published: May 2006

The NASICON-type compounds, HTixZr2−x(PO4)3 [0 ≤ x ≤ 2] were prepared by acid treatments of Li+-introduced titanium-zirconium triphosphates. Their ion-exchange properties were investigated by measuring metal ion adsorption from buffer solution of pH 8.1. The materials, HTixZr2−x(PO4)3 with x = 1.5 and x = 2 showed extremely high selectivity for Na+, as compared to Li+.
Prediction of Low-Energy Structures of Met-Enkephalin by Monte Carlo Simulated Annealing
Authors: Okamoto Yuko , Kikuchi Takeshi , Kawai Hikaru
Published: May 2006

The efficiency of the Monte Carlo simulated annealing method for prediction of the low-energy structures of Met-enkephalin is examined with the exact ECEPP function. Among the 40 obtained conformations, eleven, including the lowest-energy conformation, exhibit structure similar to the tertiary structure predicted by the Monte Carlo with minimization method. The average energy of these conformations are considerably lower than those of the remaining conformations. These findings prove the effectiveness of the method.
Characteristic Effect of Pyridine on the NIH Shift and Selectivity in the Monooxygenation of Aromatic Compounds Catalyzed by a Nonheme Iron Complex/Hydroquinones/O2 System
Authors: Funabiki Takuzo , Toyoda Takehiro , Yoshida Satohiro
Published: May 2006

The high values of the NIH and Me-NIH shifts were observed in the hydroxylation of aromatic compounds such as toluene and xylenes with O2 by the catalytic system in the title. The pyridine concentration greatly affected not only the NIH shift, but the selectivity to form phenols by hydroxylation of the aromatic ring and to form aldehydes by oxidation of the methyl group.
Enantioselective and Photochemical Reduction of Co(acac)3 Catalyzed by Protein-hybrid Ruthenium Porphyrin
Authors: Hamada Taisuke , Ishida Hitoshi , Kuwada Mutsuo , Ohkubo Katsutoshi
Published: May 2006

A protein-hybrid photocatalyst was prepared by binding RuII (TCPP)(CO)(py) (TCPP = meso-tetrakis(4-carboxyphenyl)porphyrin; py = pyridine) with Bovine Serum Albumin (BSA) covalently, and it reduced Λ-Co(acac)3 (acac− = acetylacetonato) enantioselectively under photoirradiation.
Light-Responsive Metal Encapsulation in Calix[4]arene
Authors: Deng Gang , Sakaki Toru , Nakashima Kazuaki , Shinkai Seiji
Published: May 2006

An ionophoric calix[4]arene (1), in which the metal-binding ability is photochemically controlled, was designed by introducing two anthracenes near the metal-binding site. Compound 1 itself showed the poor ion affinity and the poor ion selectivity whereas photochemically-produced isomer showed the much improved ion affinity and the sharp Na+ selectivity.
Formation of Singlet Oxygen-Like Active Oxygen Species in System Containing Nickel(II) Complex and Aliphatic Aldehyde
Authors: Nishida Yuzo , Fujimoto Tetsuya , Tanaka Noriko
Published: May 2006

The reaction mixture of nickel(II) β-diketonato complex and aldehyde (pivalaldehyde or cyclohexanecarboxaldehyde) exhibits high reactivity toward tetraphenylcyclopentadienone (one of famous singlet oxygen (1Δg) scavenger), and the origin of unique reactivity of the system was discussed.
A Novel, Simple and Cheap Source of Alkyl Radicals from Alcohols, Useful for Heteroaromatic Substitution
Authors: Coppa Fausta , Fontana Francesca , Lazzarini Edoardo , Minisci Francesco , Pianese Giuseppe , Zhao Lihua
Published: May 2006

Alkyl radicals were easily produced from secondary or tertiary alcohols in a cheap and simple way by silver-catalyzed decarboxylation of oxalic acid monoesters by S2O8=. They were utilized for the alkylation of heteroaromatic bases in a two-phase system, with high yields and selectivity.
A New Selective Method for the Homolytic Alkylation and Carboxylation of Quinones by Monoesters of Oxalic Acid
Authors: Coppa Fausta , Fontana Francesca , Lazzarini Edoardo , Minisci Francesco
Published: May 2006

Alkyl and alkoxycarbonyl radicals were generated by oxidative decarboxylation of oxalic acid monoesters by persulfate; they were then utilized for the selective substitution of quinones.
Direct Production of Liquid Hydrocarbons from Ethane with Hybrid Catalysts
Authors: Yamamura Masami , Wakatsuki Toshiya , Okado Hideo , Fujimoto Kaoru
Published: May 2006

Ethane could be converted effectively to liquid hydrocarbons over hybrid catalysts prepared by mixing a dehydrogenation catalyst of ethane with ZSM-5 type zeolites. However, no liquid hydrocarbons were produced from ethane on ZSM-5 alone.
Reductive Carbonylation of Acetylenes under Water-Gas Shift Reaction Conditions. Synthethis of Furan-2(5H)-ones from Terminal and Non-substituted Acetylenes
Authors: Joh Takashi , Nagata Hiroyuki , Takahashi Shigetoshi
Published: May 2006

Under water-gas reaction conditions terminal and non-substituted acetylenes are selectively converted into furan-2(5H)-ones by catalysis with a rhodium carbonyl cluster.
Photolysis of CO2 with 158 nm (F2) Laser. Reactivity of O (1D) with CH4, CF3H, and CF3CH3
Authors: Kojima Masanobu , Ojima Yuichi , Nakashima Nobuaki , Izawa Yasukazu , Akano Toru , Yamanaka Chiyoe
Published: May 2006

Electronically excited oxygen atom O (1D), generated by photolysis of CO2 with a 158 nm (F2) laser, reacts with CH4, CF3H, and CF3CH3 to give corresponding vibrationally excited alcohols (ROH*) by insertion into the C-H bonds, which collapse to vibrationally relaxed alcohols or alkyl and hydroxy radical pairs depending on the stability and lifetime of ROH*.
The Thin Film of Fluorine-containing Polymer Having Cyclodextrin Prepared by Langmuir-Blodgett Technique
Authors: Tamura Masanori , Sekiya Akira
Published: May 2006

Polyallylamine modified with perfluoroalkyl groups was spread by Langmuir-Blodgett technique and reacted on the aqueous solution of a cyclodextrin derivative. The cyclodextrin moiety was first introduced to the thin film of fluorine-containing polymer. The film of the polymer having the cyclodextrin moiety was characterized.
The Ωs Constant for Polar Substituents. Reinvestigation on the Separation of the Steric and the Polar Effects
Authors: Akai Ikuo , Sakakibara Kazuhisa , Hirota Minoru
Published: May 2006

The steric substituent constants Ωs for 16 heteroalkyl groups were calculated and compared with Taft’s Es constants. The Es vs. Ωs plot showed two parallel but separated lines each for alkyl and heteroalkyl groups. This fact was rationalized as the conformational effect.
Silane Coupling Agents for Photografting of Vinyl Monomer. Preparation and Properties of (N,N-Diethylamino)dithiocarbamoylpropyl(trimethoxy)silane
Authors: Kobayashi Takaomi , Takahashi Syun , Nosaka Yoshio , Fujii Nobuyuki
Published: May 2006

A silane coupling agent having a photosensitive group for photograftpolymerization, (N,N-diethylamino)dithiocarbamoylpropyl(trimethoxy)silane (DATMS), was prepared and its characteristics were examined. The application was as follows: a glass surface was treated with DATMS followed by the photografting of sodium styrenesulfonate (SSS).
Lipid-Heme/Microsphere. A New Totally Synthetic Oxygen-Carrier under Physiological Conditions
Authors: Komatsu Teruyuki , Matsubuchi Eriko , Nishide Hiroyuki , Tsuchida Eishun
Published: May 2006

Triglyceride microsphere emulsified with 5,10,15,20-tetrakis[α,α,α,α-o-[2,2-dimethyl-20-[2-(trimethylammonioethoxy)phosphonatoxy]eicosanamido]phenyl] porphyrinatoiron (lipid-heme) provides a new totally synthetic oxygen-carrier (lipid-heme/microsphere) under physiological conditions. Oxygen-binding property of the lipid-heme/microsphere is comparable with that of red blood cell.
Spin-Spin Couplings in the Copper Acetate Hydrate Dimer Studied by Single Crystal 13C ENDOR for Zinc-Doped Copper Acetate Monohydrate
Authors: Kita Shouichi , Uchida Kengo , Miyamoto Ryo , Iwaizumi Masamoto
Published: May 2006

The zinc-doped copper acetate monohydrate was examined by single crystal 13C ENDOR, and clear experimental evidence was obtained which shows importance of the spin exchange and the double-spin polarization mechanisms for the antiferromagnetic coupling between the Cu–Cu pair in the copper acetate dimer.
Phase Transitions and Ionic Motions Including Self-Diffusion in Solid Trimethylammonium Tetrafluoroborate Studied by 1H and 19F NMR
Authors: Ishida Hiroyuki , Hayama Naomi , Ikeda Ryuichi
Published: May 2006

1H and 19F NMR of (CH3)3NHBF4 were measured in the three solid phases. In Phase I existing above 453 K, the cations and anions were found to perform rapid self-diffusion as well as isotropic reorientation. In Phase II (384 ≤ T/K ≤ 453), the onset of self-diffusion of the anions and the isotropic reorientation of the cations was observed. In Phase III stable below 384 K, C3 reorientations of the CH3 groups and the whole cation, and the anionic isotropic reorientation were detected.
Conformational Asymmetry of a Linear Perfluoroalkyl Chain in Solution. Dynamic Fluorine-19 NMR Spectroscopy of the Perfluoro-n-alkanes Carrying a Chiral End-Group as a Probe of Magnetic Nonequivalence
Authors: Ute Koichi , Kinoshita Ryuji , Matsui Ken-ichi , Miyatake Nobuo , Hatada Koichi
Published: May 2006

The 470 MHz 19F NMR spectra of 1-perfluorohexyl-1-phenylethanol (1a) were measured in toluene-d8. At 0 °C and the lower temperatures, magnetic nonequivalence was observed for the two fluorine nuclei in the CF2 group adjacent to the asymmetric carbon atom and for those in the subsequent four CF2 groups. The extent of the nonequivalence was highly dependent on temperature. 1a and the perfluorooctyl- and perfluorodecyl-homologues were optically resolved and specific rotation of the pure (−)-isomers were examined from the viewpoint of the conformational asymmetry induced on the perfluoroalkyl chain.
Partial Oxidation of p-Substituted Toluenes to Corresponding Benzaldehydes in Vapor Phase over V2O5-Tl2O Catalyst
Authors: Ueshima Michio , Saito Noboru
Published: May 2006

The selective oxidation of p-substituted toluenes to corresponding aromatic aldehydes were effectively performed by vapor phase oxidation reaction over V2O5-Tl2O combination catalyst with high activity and selectivity.