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Volume 38, Issue 9
Displaying 1-32 of 32 articles from this issue
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Highlight Review
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Yoshiro Yamashita2009 Volume 38 Issue 9 Pages 870-875
Published: September 05, 2009
Released on J-STAGE: August 01, 2009
JOURNAL RESTRICTED ACCESSNitrogen heterocycles containing C=N double bonds have electron-accepting properties and can be used as n-type semiconductors for organic field-effect transistors. Thiazole, benzothiadiazole, pyrazine, and related heterocycles have been incorporated in π-conjugated systems. The effects of the structures and electron affinity of the heterocycles on transistor characteristics have been investigated here.View full abstract
Letter
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Yoshio Nakahara, Chenghuan Ma, Hiroyuki Yamamoto, Fumio Oi, Keiichi Ki ...2009 Volume 38 Issue 9 Pages 876-877
Published: September 05, 2009
Released on J-STAGE: August 01, 2009
JOURNAL RESTRICTED ACCESSA novel method to prepare siloxane-based nanoparticles possessing bromoalkyl groups, which are reactive functional groups, by bromoalkoxylation and bromination of poly(vinylsilsesquioxane) nanoparticles using N-bromosuccinimide and 1-butanol was developed. No shape distortion or fusion of nanoparticles after the chemical reaction was observed by transmission electron microscopy.View full abstract -
Kikuo Komori, Sumi Takamiya, Nobuhiko Kojima, Osamu Kuwazuru, Nobuhiro ...2009 Volume 38 Issue 9 Pages 878-879
Published: September 05, 2009
Released on J-STAGE: August 01, 2009
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Supplementary materialA reconstituted porous elastin film prepared by a novel cross-linker, Dode-DSP, was examined for its feasibility as a biocompatible and elastic cellular scaffold. Although the mechanical properties of the film alone drastically deteriorated in physical conditions due to degradation, loading of fibroblasts retarded the deterioration in terms of distensibility and E value (Young’s modulus).View full abstract -
Tomoaki Yago, Masao Gohdo, Masanobu Wakasa2009 Volume 38 Issue 9 Pages 880-881
Published: September 05, 2009
Released on J-STAGE: August 01, 2009
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Supplementary materialEthanol concentration dependence of photoinduced charge separation between zinc tetraphenylporphyrin (ZnTPP) and duroquinone (DQ) in benzonitrile was studied by nanosecond laser flash photolysis. Acceleration of the photoinduced charge separation reaction rate by hydrogen bonding between DQ anion radical and ethanol was observed. A simple analysis in the framework of the Marcus theory indicated that the observed electron-transfer reaction rate was affected not only by the decrease of the reaction free energy but also an increase of the reorganization energy in the presence of hydrogen bonding.View full abstract -
Yoshitaka Saga, Toshihiro Nakagawa, Tomohiro Miyatake, Hitoshi Tamiaki2009 Volume 38 Issue 9 Pages 882-883
Published: September 05, 2009
Released on J-STAGE: August 01, 2009
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Supplementary materialVisible absorption and circular dichroism spectra of zinc chlorophyll derivatives possessing an oligo(oxyethylene) moiety at the 17-propionate in aqueous media were drastically changed by treatment with dichloromethane or chloroform, indicating that dimeric and monomeric species were converted into chlorosome-like large self-aggregates.View full abstract -
Takuya Masuda, Hideo Naohara, Satoru Takakusagi, Pankaj R. Singh, Kohe ...2009 Volume 38 Issue 9 Pages 884-885
Published: September 05, 2009
Released on J-STAGE: August 01, 2009
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Supplementary materialAdsorption process and structure of perfluorosulfonated acid (PFSA) polymer on a highly oriented pyrolytic graphite (HOPG) surface were elucidated by an in situ tapping mode atomic force microscope (AFM). Micellar aggregates of PFSA polymers first randomly adsorbed on a bare HOPG surface, and then the adsorbed aggregates extended under the influence of atomic arrangement of HOPG surface, to form two-dimensionally ordered domains.View full abstract -
Yuuki Ishihara, Keisuke Miyazaki, Shuji Yamashita, Masahiro Hirama2009 Volume 38 Issue 9 Pages 886-887
Published: September 05, 2009
Released on J-STAGE: August 01, 2009
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Supplementary materialCiguatoxins, principal causative toxins of ciguatera seafood poisoning, are large ladder-like polycyclic ethers that exert their toxicities by binding to the voltage-sensitive sodium channels. We report C7/C51 chemoselective derivatization of 51-hydroxyCTX3C applicable for synthesis of biological probes.View full abstract -
Yohei Yamamoto, Wusong Jin, Takanori Fukushima, Takeo Minari, Kazuhito ...2009 Volume 38 Issue 9 Pages 888-889
Published: September 05, 2009
Released on J-STAGE: August 01, 2009
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Supplementary materialHexabenzocoronene (HBC) nanotubes, prepared by self-assembly of 1–4 with different oligoether chains, all show a p-type conducting profile in a field-effect transistor (FET) setup, where hole mobilities of their film samples are two orders of magnitude greater than that of a cast film composed of ill-defined, nontubular HBC aggregates. Taking into account their time-resolved microwave conductivities, the observed FET properties appear to be largely affected by the kinetics of intertubular hole hopping, which could be less facilitated as the oligoether chains on the nanotube surface are longer.View full abstract -
Satoshi Kubota, Takafumi Maruyama, Hiromasa Nishikiori, Nobuaki Tanaka ...2009 Volume 38 Issue 9 Pages 890-891
Published: September 05, 2009
Released on J-STAGE: August 01, 2009
JOURNAL RESTRICTED ACCESSMultiwalled carbon nanotubes (MWNTs) were covalently functionalized by poly(ethylene glycol) (PEG) of different molecular weights. The lengths of the PEG on each sample were evaluated using 1-naphthol as a fluorescence probe. The intensity of ion-pair fluorescence of the 1-naphthol increased with the length of the attached PEG due to interaction between the 1-naphthol and ether groups of the PEG. This increase indicated that fluorescence measurement using 1-naphthol is an excellent tool to evaluate the length of PEG on the MWNTs.View full abstract -
Naka Koyata, Takuya Nagai, Masashi Kawasaki, Takuya Noguchi, Masayuki ...2009 Volume 38 Issue 9 Pages 892-893
Published: September 05, 2009
Released on J-STAGE: August 01, 2009
JOURNAL RESTRICTED ACCESSAcetylation of 2-aryl-2-butene-1,4-diols with 10 equivalents of vinyl acetate in the presence of 50 wt % of porcine pancreas lipase (PPL) Type II regioselectively proceeded to afford the corresponding 3-aryl-4-hydroxy-2-butenyl acetates in 83–93% yields. Hydrolysis of 2-aryl-2-butene-1,4-diyl diacetates in the presence of 100 wt % of PPL Type II regioselectively afforded the corresponding 2-aryl-4-hydroxy-2-butenyl acetates in 68–95% yields.View full abstract -
Ki Hyun Kim, Sang Un Choi, Kang Ro Lee2009 Volume 38 Issue 9 Pages 894-895
Published: September 05, 2009
Released on J-STAGE: August 01, 2009
JOURNAL RESTRICTED ACCESSA novel monoacylglycerol with an amino acid moiety, neomastoidin A (1), was isolated from the fruiting bodies of the poisonous mushroom Macrolepiota neomastoidea. The structure of 1 was established by extensive spectroscopic analysis and further confirmed by application of a dibenzoate chirality method. Neomastoidin A (1) exhibited cytotoxicity against SK-OV-3 and SK-MEL-2 cell lines.View full abstract -
Takashi Muramatsu, Azumao Toyota, Yusuke Satou2009 Volume 38 Issue 9 Pages 896-897
Published: September 05, 2009
Released on J-STAGE: August 08, 2009
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Supplementary materialThe one-electron reduction of 4-vinyl-1-methylpyridinium bromide with sodium amalgam in degassed acetonitrile at 0 °C leads to the formation of 1,2-bis(1-methyl-1,4-dihydro-4-pyridinylidene)cyclobutane, which is characterized by means of 1H NMR, 13C NMR, and UV–vis absorption spectroscopy.View full abstract -
Chikao Onogi, Hajime Torii, Hiro-o Hamaguchi2009 Volume 38 Issue 9 Pages 898-899
Published: September 05, 2009
Released on J-STAGE: August 08, 2009
JOURNAL RESTRICTED ACCESSThe 13C and 2H isotope substitution effects have been examined for the “Raman spectroscopic signature of life,” a mitochondrial Raman band at 1602 cm−1 that sharply reflects the metabolic activity of living yeast cells. The band shifts to 1542 cm−1 with 13C substitution and to 1599 cm−1 with 2H substitution. Normal mode analysis based on a DFT calculation suggests that it originates from a C=C double bond having no hydrogen atoms attached to the carbon atoms. The in-phase C=C stretch mode of ubisemiquinone radicals (CoQ and/or CoQH•) emerges as a strong candidate for the origin of the 1602 cm−1 band.View full abstract -
Yoko Tatewaki, Tatsuya Hatanaka, Mutsumi Kimura, Hirofusa Shirai2009 Volume 38 Issue 9 Pages 900-901
Published: September 05, 2009
Released on J-STAGE: August 08, 2009
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Supplementary materialTriphenylenes bearing chiral amide termini were found to form self-assembled nanofibers by the combination of π–π stacking of triphenylene moieties with a hydrogen-bond network of amide terminates.View full abstract -
Takao Osako, Yasuhiro Uozumi2009 Volume 38 Issue 9 Pages 902-903
Published: September 05, 2009
Released on J-STAGE: August 08, 2009
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Supplementary materialThe aerobic oxidation of alcohols was promoted in water under atmospheric molecular oxygen by a readily recyclable self-supported bipyridyl–palladium polymeric complex, which was prepared via construction of a metal–organic framework (MOF) of a bipyridyl–palladium complex bearing carboxylic groups and a copper(II) linker.View full abstract -
Masaya Kokubo, Takeshi Naito, Shu Kobayashi2009 Volume 38 Issue 9 Pages 904-905
Published: September 05, 2009
Released on J-STAGE: August 22, 2009
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Supplementary materialReversal of enantioselectivity in Cu–chiral bipyridine catalyzed asymmetric ring-opening reactions of meso-epoxides with indole and aniline derivatives was observed compared to Sc–chiral bipyridine catalyzed reactions, where the same chiral ligand was used. It was revealed from X-ray crystal structural analysis that a square pyramidal structure for the Cu(II) complex and a pentagonal bipyramidal structure for the Sc(III) complex were formed, which could explain the reversal of the enantioselectivity.View full abstract -
Hiroko Kawakami, Kohtaro Goto, Mamoru Mizuno2009 Volume 38 Issue 9 Pages 906-907
Published: September 05, 2009
Released on J-STAGE: August 22, 2009
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Supplementary materialWe describe a process that simultaneously achieves microreaction synthesis and fluorous liquid-phase extraction in a single system. Use of this method in multi-step synthesis of a protected monosaccharide unit yielded the desired product. Moreover, the total synthesis time, including an only single column chromatography as the last step, was significantly shortened compared with general synthetic methods.View full abstract -
Hiroaki Kitahara, Ikuyo Kamiya, Hidehiro Sakurai2009 Volume 38 Issue 9 Pages 908-909
Published: September 05, 2009
Released on J-STAGE: August 22, 2009
JOURNAL OPEN ACCESSGold nanoclusters stabilized by a hydrophilic polymer, poly(N-vinyl-2-pyrrolidone) (Au:PVP), catalyzed the intramolecular addition of toluenesulfonamide to unactivated alkenes in EtOH under aerobic conditions.View full abstract -
Yuka Yokoyama, Satoshi Mitsunobu, Kazuya Tanaka, Takaaki Itai, Yoshio ...2009 Volume 38 Issue 9 Pages 910-911
Published: September 05, 2009
Released on J-STAGE: August 22, 2009
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Supplementary materialIt was found that the amount of arsenite incorporated into calcite is much less than that of arsenate. The result suggests that the sequestration of arsenic by coprecipitation with calcite cannot be an important chemical process under reducing conditions such as in groundwater where arsenite is the dominant arsenic species.View full abstract -
Yasuo Izumi, Yoshiyuki Shibata2009 Volume 38 Issue 9 Pages 912-913
Published: September 05, 2009
Released on J-STAGE: August 22, 2009
JOURNAL RESTRICTED ACCESSThe electronic state and site structure of doped S to enable photocatalysis of TiO2 under visible light were investigated using S K-edge XANES compared to theoretically generated spectra. S sites substituting on the O atoms of TiO2 were predominant and essential in photocatalysis based on S K absorption edge peak energy and post-edge pattern. Minor cationic/elemental S sites were detected as peaks due to the transition to vacant level of S3p, but most were lost during photocatalysis.View full abstract -
Akiko Okamoto, Noriyuki Yonezawa2009 Volume 38 Issue 9 Pages 914-915
Published: September 05, 2009
Released on J-STAGE: August 22, 2009
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Supplementary materialReversible ArSE aroylation has been observed in the reaction of 2,7-dimethoxynaphthalene (1) with 4-chlorobenzoic acid/acid chloride 2 with the aid of discrete acidic mediators. The reaction readily gives 1-aroylated-, 3-aroylated-, and 1,8-diaroylated products. The product distribution clearly shows dependence on the kind and strength of the acidic mediators and the time-course of the distribution manifests dearoylation of the productive aroylnaphthalenes. These reaction behaviors including acid-strength-dependent reversibility are well interpreted from the viewpoint of highly congested noncoplanar geometry of the polyaromatic ketone products.View full abstract -
Tatsuo Kimura, Daisuke Nakashima, Nobuyoshi Miyamoto2009 Volume 38 Issue 9 Pages 916-917
Published: September 05, 2009
Released on J-STAGE: August 22, 2009
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Supplementary materialLamellar mesostructured aluminum organophosphonate (AOP-1) with unique inorganic–organic hybrid framework can be prepared from the reactions of aluminium triisopropoxide with methylene diphosphonic acid in the presence of alkyltrimethylammonium surfactants, which is the first example of the preparation of layered aluminum organophosphonate with pure hybrid framework mainly composed of Al, P, and organic group.View full abstract -
Satoshi Inagaki, Koji Oikawa, Yoshihiro Kubota2009 Volume 38 Issue 9 Pages 918-919
Published: September 05, 2009
Released on J-STAGE: August 22, 2009
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Supplementary materialNovel cage-type mesoporous carbon “carbon nanocage (CNC),” which is prepared as a carbon replica of KIT-5 mesoporous silica, showed a high electrochemical performance as an electrode material, due to the high specific surface area and mesopore volume as well as the sparse carbon network.View full abstract -
Jung Won Kim, Jinling He, Kazuya Yamaguchi, Noritaka Mizuno2009 Volume 38 Issue 9 Pages 920-921
Published: September 05, 2009
Released on J-STAGE: August 22, 2009
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Supplementary materialThe one-pot synthesis of aldimines from primary alcohols and amines via sequential reactions of alcohol oxidation and dehydrative condensation could efficiently be promoted by supported ruthenium hydroxide catalysts, in particular Ru(OH)x/TiO2. The observed catalysis was truly heterogeneous and the retrieved catalyst could be reused without an appreciable loss of high catalytic performance.View full abstract -
Tetsu Mitsumata, Noriyuki Abe2009 Volume 38 Issue 9 Pages 922-923
Published: September 05, 2009
Released on J-STAGE: August 22, 2009
JOURNAL RESTRICTED ACCESSA new class of magnetorheological gel that demonstrates drastic and reversible changes in dynamic modulus without using strong magnetic fields was obtained. The magnetic gel consists of carrageenan of polysaccharides and carbonyl iron particles. The magnetic gel with a volume fraction of 0.34 exhibited a reversible increase by factors of 500 of the storage modulus and 1200 of the loss modulus upon a magnetic field of 500 mT. We postulate that the particle structural change by magnetic fields leads to the drastic change in the dynamic modulus.View full abstract -
Masa-aki Sato, Hirokazu Kamine2009 Volume 38 Issue 9 Pages 924-925
Published: September 05, 2009
Released on J-STAGE: August 22, 2009
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Supplementary materialAn unsymmetrically substituted quaterthiophene with two terminal ferrocenyl groups was prepared as a long π-conjugated system. Electrochemical and spectroscopic studies were carried out to evaluate the electronic and/or electrostatic communication between the two terminals. The one-electron oxidation would occur at one ferrocene moiety specified due to the unsymmetry of the oligothiophene moiety. The one-electron oxidizing species extended into the oligothiophene moiety apparently interacts with the other terminal ferrocene moiety.View full abstract -
Hisahiro Hagiwara, Masayoshi Sekifuji, Norio Tsubokawa, Takashi Hoshi, ...2009 Volume 38 Issue 9 Pages 926-927
Published: September 05, 2009
Released on J-STAGE: August 29, 2009
JOURNAL RESTRICTED ACCESSA nano-silica dendrimer, poly(amidoamine)-grafted nano-silica (nano-PAMAM), catalyzed the Knoevenagel reaction of aryl and aliphatic aldehydes with various active methylene compounds at room temperature in good yields. The reaction conditions were mild enough that base-sensitive AcO or acid-sensitive THPO groups remained intact in the products. The catalyst was recycled up to 4 times in 78% average yield.View full abstract -
Yeqian Shen, Luming Peng, Xuefeng Guo, Weiping Ding2009 Volume 38 Issue 9 Pages 928-929
Published: September 05, 2009
Released on J-STAGE: August 29, 2009
JOURNAL RESTRICTED ACCESSA simple, rapid, and highly efficient method for the synthesis of uniform vanadium oxide nanotubes with the cooperation of tetramethylammonium hydroxide and tetradecylamine was successfully developed.View full abstract -
Kei Shimoda, Daisuke Sato, Hiroki Hamada2009 Volume 38 Issue 9 Pages 930-931
Published: September 05, 2009
Released on J-STAGE: September 05, 2009
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Supplementary materialSynthesis of β-glucosides, β-maltosides, and β-maltotriosides of two α-tocopherol derivatives, i.e., 2,5,7,8-tetramethyl-2-(4-methylpentyl)-6-chromanol and 2,5,7,8-tetramethyl-2-(4,8-dimethylnonyl)-6-chromanol, was achieved by bacterial glucosylation with Xanthomonas campestris followed by cyclodextrin glucanotransferase-catalyzed glucooligosaccharide formation. The β-glucosides and β-maltosides of α-tocopherol derivatives showed inhibitory effects on IgE antibody formation and on histamine release from rat peritoneal mast cells.View full abstract -
Zhen Jin, Hao Li2009 Volume 38 Issue 9 Pages 932-933
Published: September 05, 2009
Released on J-STAGE: September 05, 2009
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Supplementary materialCo filtering film consisting of numerous compact Co nanowires with a diameter of ca. 10 nm was prepared by a magnetic-field-induced synthetic route. Room-temperature coercivity (Hc) of the Co filtering film measured with the applied magnetic field parallel and perpendicular to the film plane was 210 and 481 Oe, respectively, which was significantly higher than that of bulk Co film.View full abstract -
Ken Ohmori, Megumi Takeda, Takashi Higuchi, Tomohiro Shono, Keisuke Su ...2009 Volume 38 Issue 9 Pages 934-935
Published: September 05, 2009
Released on J-STAGE: September 05, 2009
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Supplementary materialStereocontrolled synthesis of (−)-afzelechin was achieved via the Mitsunobu reaction, where complete stereospecificity was observed when an electron-withdrawing group was introduced to the para-position of the B-ring fragment.View full abstract
Additions and Corrections
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Chizuru Hongo, Michiya Matsusaki, Kohji Nishida, Mitsuru Akashi2009 Volume 38 Issue 9 Pages 936
Published: September 05, 2009
Released on J-STAGE: September 05, 2009
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