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Tadashi Sento, Shogo Shimazu, Nobuyuki Ichikuni, Takayoshi Uematsu
1998 Volume 27 Issue 12 Pages
1191-1192
Published: 1998
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The novel host-guest catalysts, in which a chiral rhodium complex was intercalated into structural tuning guests modified smectites, were synthesized, and drastic change in catalysis was observed depending on the orientation of guest molecules.
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Seung-Woo Lee, Izumi Ichinose, Toyoki Kunitake
1998 Volume 27 Issue 12 Pages
1193-1194
Published: 1998
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A complex of carbobenzyloxy-L-alanine and titanium n-butoxide was adsorbed to hydroxylated surfaces repeatedly to produce ultathin multilayers, which, upon removal of the amino acid template, showed selective binding of carbobenzyloxy-L-amino acids.
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Yasuhiro Seki, Noritaka Mizuno, Makoto Misono
1998 Volume 27 Issue 12 Pages
1195-1196
Published: 1998
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UV-vis data revealed that monoperoxomonovanadate is an active species for liquid-phase oxygenation of methane with hydrogen peroxide catalyzed vanadium-containing catalysts in trifluoroacetic anhydride.
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Zhishan Bo, Li Zhang, Bing Zhao, Xi Zhang, Jiacong Shen, Stephanie H&o ...
1998 Volume 27 Issue 12 Pages
1197-1198
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A polyther dendron with a thiol group at the focal point was synthesized and well characterized, and then used for the preparation of self-assembly monolayers (SAMs) on metal surface. The monolayers on metal surface were studied by Fourier transform surface enhanced Raman scattering spectroscopy(FT-SERS) and STM etc.
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Kazushi Mashima, Tomoyuki Abe, Kazuhide Tani
1998 Volume 27 Issue 12 Pages
1199-1200
Published: 1998
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The rhodium and iridium (η
5-C
5Me
5)MCl complexes (3a: M = Rh; 3b: M = Ir) of (1S,2S)-N-(p-toluenesulfonyl)-1,2-diphenylethylenediamine were found to be catalyst precursors for asymmetric transfer hydrogenation of acetophenone, 2-acetonaphthone, 1-tetralone, and 1-indanone to give (S)-1-phenylethanol (90% ee), (S)-1-(2-naphthyl)ethanol (85% ee), (S)-1-tetralol (97% ee), and (S)-indanol (99% ee), respectively.
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Kazushi Mashima, Tomoyuki Abe, Kazuhide Tani
1998 Volume 27 Issue 12 Pages
1201-1202
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We prepared the half-sandwich hydride and 16-electron complexes of rhodium and iridium bearing an anion of (1S,2S)-N-(p-toluenesulfonyl)-1,2-diphenylethylenediamine: for the iridium catalyst system, a 16-electron complex 2b and an 18-electron, hydride complex 3b were synthesized, while only a 16-electron complex 2a was detected for the rhodium catalyst.
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Kuen-Song Lin, H. Paul Wang, Y. W. Yang
1998 Volume 27 Issue 12 Pages
1203-1204
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Supercritical water oxidation (SCWO) of 2-chlorophenol (2CP) is very effected in the presence of 0.02 M Na
+ that reduces the formation of by-products (higher chlorinated phenols). The undesired by-products in the SCWO of 2CP catalyzed by CuO in zeolites Y, ZSM-5, and ZSM-48 is also reduced extensively. Chlorine-bonded CuO species in the channels of ZSM-5 are not observed by EXAFS (extended X-ray adsorption fine structure) spectroscopy.
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Hongqi Li, Zhongqi Yao, Renhua Liu, Ganzu Tan, Xianda Yu
1998 Volume 27 Issue 12 Pages
1205-1206
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Two crowned azobenzene derivatives APCM and APCN were synthesized and incorporated into a β-cyclodextrin derivative ACD. Both APCM/ACD and APCN/ACD formed a stable Langmuir monolayer at the air-water interface. Multilayer Langmuir-Blodgett (LB) films with an ordered lamellar structure were constructed from APCM/ACD and APCN/ACD monolayers which showed a nonlinear polarisability (β) of 4 × 10
−29 and 1 × 10
−30 esu, respectively, after a month of storage.
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Boonsong Kongkathip, Ngampong Kongkathip, Ponsak Khunnavutimanotum, Ut ...
1998 Volume 27 Issue 12 Pages
1207-1208
Published: 1998
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Hecogenin can be selectively dehydrogenated to the corresponding Δ
9(11)-3-hydroxysteroid, Δ
1,4- and Δ
1,4,9(11)-3-ketosteroids by the treatment of 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) with a variety of solvents.
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Ye Wang, Yoshimoto Takahashi, Yasuo Ohtsuka
1998 Volume 27 Issue 12 Pages
1209-1210
Published: 1998
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The combination of CaO with Cr
2O
3 leads to active catalysts for selective conversion of methane to ethane and ethylene by carbon dioxide in the absence of oxygen.
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Yoshihisa Sakata, Satoshi Nobukuni, Taiji Hashimoto, Fumiyoshi Takahas ...
1998 Volume 27 Issue 12 Pages
1211-1212
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High catalytic performance for methanol production from CO and H
2 was confirmed over copper-lanthanide oxide binary catalyst which was prepared from a characteristic copper-lanthanide complex oxide of Cu
6O
8Ln(NO
3). The catalyst exhibited high activity from lower temperatures compared with copper-zinc catalyst systems under the same condition.
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Peng Wu, Masakazu Iwamoto
1998 Volume 27 Issue 12 Pages
1213-1214
Published: 1998
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Formation of zirconium-phosphorus complex oxide with stable hexagonal pore structure has been clarified to result from anion exchange of HPO
42− ions for SO
42− ions in surfactant-assisted zirconium oxide during phosphoric acid treatment.
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Yoshio Takasu, Takashi Nakamura, Yasushi Murakami
1998 Volume 27 Issue 12 Pages
1215-1216
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RuO
2-MoO
3/Ti clectrodes prepared by a dip-coating method provide an extremely large pseudocapacitance showing that they have a potential for use as electrochemical capacitors. The highest pseudocapacitance was 208 F g
−1 for RuO
2(50)-MoO
3(50)/Ti. The voltammetric charge of this electrode, 166 C g
−1 between 0.3 and 1.1 V (vs. RHE), corresponds to 0.48 protons contributed to the adsorption and desorption on every loaded ruthenium, if the probable contribution of molybdenum to the pseudocapacitance was neglected.
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Mikael Retbøll, Youichi Ishii, Masanobu Hidai
1998 Volume 27 Issue 12 Pages
1217-1218
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Novel dinuclear pyridine-1-imine Rh(III) complexes [Cp
*Rh(μ
2-Cl){μ
2-NHNC
5H
4(4-Me)}
2RhCp
*]Cl[PF
6]
2 (3) and [Cp
*Rh(μ
2-Cl){μ
2-NHNC
5H
3(2-CH
2)(6-Me)}RhCl-Cp
*][PF
6](4) were synthesized by the reaction of [Cp
*RhCl
2]
2 with [NH
2NC
5H
4(4-Me)][PF
6] and [NH
2NC
5H
3(2,6-Me
2)][PF
6], repectively, in the presence of a base. The formation of 4 involves C(sp
3)-H bond activation at the benzylic position of a pyridine-1-imine ligand.
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Takashi Nakanishi, Hiroto Murakami, Naotoshi Nakashima
1998 Volume 27 Issue 12 Pages
1219-1220
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A C
60-bearing artificial lipid 1 forms stable monolayers at the air-water interface both in the dark and in the light. The Langmuir-Blodgett (LB) film prepared in the dark showed a phase transition by which the electronic interaction between the fullerene moieties was controllable. The LB film prepared in the light exhibited structureless electronic spectra with almost no temperature dependence.
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Kazuaki Ito, Atsushi Kida, Yoshihiro Ohba, Tyo Sone
1998 Volume 27 Issue 12 Pages
1221-1222
Published: 1998
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Chiral calixarene analog incorporating amino acid residues into macrocyclic rings was prepared. The macrocycles form a chiral concave, which is induced by the chiral transmission from the amino acid to the phenol-formaldehyde tetramer unit through the hydrogen bonds. Molecular recognition for a chiral ammonium ion by the macrocycles was investigated.
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Kenji Shinohara, Ryoichi Aogaki
1998 Volume 27 Issue 12 Pages
1223-1224
Published: 1998
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Using iron-oxygen reaction in sodium chloride solution, a new type of electrochemical cell operated by high magnetic field was fabricated. The electromotive force (EMF) of this cell reached about 8 mV. This value was about 100 times larger than expected by the magnetic energy.
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Taek Dong Chung, Sun Kil Kang, Hasuck Kim, Joo Ryun Kim, Weon Seok Oh, ...
1998 Volume 27 Issue 12 Pages
1225-1226
Published: 1998
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A new water-soluble calix[4]arene-triacid-monoquinone 3 has been synthesized and its ion binding properties in aqueous solution were investigated by means of voltammetry and UV-visible spectrophotometry. The electrochemical behavior of 3 is dependent on the concentration of Ca
2+ ion rather than that of other alkaline earth metal ions as well as alkali metal cations. The selective response toward Ca
2+ was achieved even in the presence of a large excess ( > 1000-fold) of interfering Na
+ ion.
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Krishanthi Padmarani Jayasundera, Hideki Kinoshita, Katsuhiko Inomata
1998 Volume 27 Issue 12 Pages
1227-1228
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Total syntheses of phycocyanobilin and its photoactivatable derivative were accomplished by developing a new and versatile method for the construction of A,B-rings component, which consists of the Wittig-type new coupling reaction of 4-(1-methoxyethyl)-3-methyl-5-tosyl-1,5-dihydro-2H-pyrrol-2-one and a 2-formyl pyrrole derivative in the presence of
nBu
3P and a base, followed by reduction with aluminum amalgam and subsequent acid treatment.
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Takashi Hayashi, Atsushi Tomokuni, Tadashi Mizutani, Yoshio Hisaeda, H ...
1998 Volume 27 Issue 12 Pages
1229-1230
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Myoglobins reconstituted with synthetic zinc porphyrins having multiple carboxylic acid or alkylamine groups bound to the terminal of peripheral side chains can bind cationic methyl viologen or anionic hexacyanoferrate, respectively, via electrostatic interaction, where the distribution of the charged amino acid residues on the myoglobin surface has an influence on complex formation between the protein and its partner.
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Yasuhiro Kawanami, Noriko Iizuna, Kiyoka Okano
1998 Volume 27 Issue 12 Pages
1231-1232
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Kinetic resolution of racemic N-arylmethylated trans-2-acetoxy-methyl-5-hydroxymethylpyrrolidines by using lipasecatalyzed transesterification has been studied. The enantioselectivity depends significantly on the structure of the aryl ring and N-3,5-dimethylbenzylpyrrolidine was found to be the best substrate for the present reaction.
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Akira Adachi, Joji Ohshita, Atsutaka Kunai, Junji Kido, Koichi Okita
1998 Volume 27 Issue 12 Pages
1233-1234
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Dithienosilole derivatives (DTS) improved an electron injection efficiency of the typical organic electroluminescent device, indicating that DTS may have a high electron affinity.DTS also exibited a blue light emitting and hole injection properties.
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Yoshio Takasu, Chiemi Matsuo, Takeshi Ohnuma, Mitsuo Ueno, Yasushi Mur ...
1998 Volume 27 Issue 12 Pages
1235-1236
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By means of a model electrode method, it has been found that the ruthenium oxide highly dispersed on glassy carbon produces an extremely large surface charge density which corresponds to more than one proton adsorbs on every ruthenium loaded on the glassy carbon, if the charge was supposed to be caused only by the adsorption of proton on the RuO
2.
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G. Vidyasagar Reddy, D. S. Iyengar
1998 Volume 27 Issue 12 Pages
1237-1238
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A novel dichloromethylenation of oxazolidinones and their conversion to allyl amines 3a-e, key precursors for potential HIV protease inhibitors is described.
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Kenji Shinohara, Ryoichi Aogaki
1998 Volume 27 Issue 12 Pages
1239-1240
Published: 1998
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Under high magnetic field, giant circular motion of zinc particles during dissolution in sulfuric acid was observed. This effect was ascribed to the Lorentz force arising from the interaction between the dissolution current penetrating through the inside of the particle and the external magnetic field. According to theoretical predictions, it wasd concluded that the coagulated zinc particles take the circular motion, and the particle velocity is proportional to the magnetic flux density.
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Wataru Kubo, Kei Murakoshi, Takayuki Kitamura, Yuji Wada, Kenji Hanabu ...
1998 Volume 27 Issue 12 Pages
1241-1242
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Low molecular weight gelators were applied to solidify the redox electrolyte in dye-sensitized TiO
2 solar cells. The resulting quasi-solid-state dye-sensitized solar cells showed comparable efficiency and higher stability than the similar cell with the liquid phase redox electrolyte.
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Jun Kubo, Tohru Mori, Yutaka Morikawa
1998 Volume 27 Issue 12 Pages
1243-1244
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Intercalation of methanol and ethanol into Na-fluorotetrasilicic mica was traced dynamically by X-ray diffraction. The intercalation of methanol is much faster than that of ethanol. Methanol forms successively single and double layers between silicate sheets of the mica, while ethanol forms similar layers concurrently.
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Takehiko Ueda, Eiichi Kato, Kiminori Oshikawa, Junichiro Arai, Junzo S ...
1998 Volume 27 Issue 12 Pages
1245-1246
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A new method to determine oxygen uptake rate of living cells is described. Two kinds of cultured mammalian cells were incubated in a 2.0 ml vol cuvette, which was equipped with an oxygen electrode as specially designed to measure the oxygen concentration ([O
2]) in the culture medium. This new method allowed 1) instant determination of the respiratory activity of living cells, and 2) simultaneous monitoring of responses of cell against extracellular stimuli.
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Yasushi Okamoto, Kazunori Takahata, Kenji Saeki
1998 Volume 27 Issue 12 Pages
1247-1248
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The structure of the catalyst and the influences of oxygen and water on the activity for MMA polymerization were investigated. The main component of partially oxidized tributylborane was found to be butoxydibutylborane. Higher oxygen concentrations in the atmospheric gas tended to result in higher levels of polymerization activity within the oxygen concentration range of 0.1 to 0.2 mole percent relative to the catalyst. The presence of 0.3 to 0.5 mole, per mole of the catalyst, of water resulted in improvements in activity. The above results suggest that the catalyst contains some active species such as peroxides, or butyl radicals as a precursor and that oxygen and water promote both the formation and elimination of such active species.
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Susumu Takano, Toshio Naito, Tamotsu Inabe
1998 Volume 27 Issue 12 Pages
1249-1250
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Electrochemical oxidation of PXX and [Co(Pc)(CN)
2]
− in acetonitrile gives a highly conducting crystal containing two-leg ladder chains of the partially oxidized Co(Pc)(CN)
2 units. The doubling of the one-dimensional chains makes the electrical properties quite different from those in the single chain conductor.
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Prem Kumar Srivastava, Shyam Sundar Majhi, Raghunath Prasad Rastogi, I ...
1998 Volume 27 Issue 12 Pages
1251-1252
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White and pink alternating bands have been found to be formed in the polymerization of methacrylic acid in methanol in the presence of benzoyl peroxide and N,N-dimethylaniline in a glass tube. The band structure depends on the initial concentrations of methanol and benzoyl peroxide.
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Yoshihisa Sakata, Tomonori Yamamoto, Taichi Okazaki, Hayao Imamura, Su ...
1998 Volume 27 Issue 12 Pages
1253-1254
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The generation of photocatalytic activity under the irradiation of visible light (longer than 460 nm) was observed over copper ion containing TiO
2. It is suggested that low valent copper oxide which was produced in the catalyst under the irradiation of UV plays an important role to the generation of the activity under the irradiation of visible light.
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Takamichi Yamagishi, Eiichiro Mizushima, Hideyuki Sato, Motowo Yamaguc ...
1998 Volume 27 Issue 12 Pages
1255-1256
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Imine isomerization via [1,3]-hydrogen shift catalyzed by dihydrido(dinitrogen)tris(triphenylphosphine)ruthenium(II) or dihydridotetrakis(triphenylphosphine)ruthenium(II) complexes is described. In toluene under hydrogen atmosphere, ruthenium-dihydride complexes could cause the isomerization of ketimines to aldimines effectively.
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Satoshi Nakagawa, Takashi Sugimura, Akira Tai
1998 Volume 27 Issue 12 Pages
1257-1258
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A comparative study of the reactivities of the hydrogenation of β-ketoesters over tartaric acid-modified and unmodified Raney nickels indicated that a substrate specific activation by the tartaric acid modification is the reason for the almost perfect enantio-differentiation in the reaction of methyl 3-cyclopropyl-3-oxopropanoate (4).
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Taisuke Hamada, Shigeyoshi Sakaki, Bruce S. Brunschwig, Etsuko Fujita, ...
1998 Volume 27 Issue 12 Pages
1259-1260
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One-electron reduction of [Ru(menbpy)
3]
2+ [menbpy = 4,4′-di{(1R,2S,5R)-(−)-menthoxycarbonyl}-2,2′-bipyridine] by pulse radiolysis produces a Ru(II) complex of a menbpy-centered anion radical, which reduces Δ-[Co(acac)
3] more rapidly than Λ-[Co(acac)
3] with an enantioselectivity of 2.7 in 85% EtOH/H
2O.
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Katsuya Uchiyama, Yujiro Hayashi, Koichi Narasaka
1998 Volume 27 Issue 12 Pages
1261-1262
Published: 1998
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Alkylideneaminyl radicals are generated from O-2,4-dinitrophenyloximes of γ,δ-unsaturated ketones by treatment with NaH and 3,4-methylenedioxyphenol. The resulting radical species successively add to the olefinic moiety intramolecularly to afford 3,4-dihydro-2H-pyrroles.
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Chika Nozaki, Makoto Misono, Noritaka Mizuno
1998 Volume 27 Issue 12 Pages
1263-1264
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The tetrabutylammonium salt of γ-SiW
10{Fe(OH
2)}
2O
386− showed high turnover number of 135-147 for the oxidation of cyclohexane with 1 atm molecular oxygen and the value is of the highest level among silicotungstates with various iron contents and other catalysts reported. Results obtained with radical initiator and scavenger, and the selectivity for oxygenation of adamantane suggest that the reaction involves a radical-chain path.
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Shahram Tangestaninejad, Valiollah Mirkhani
1998 Volume 27 Issue 12 Pages
1265-1266
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Epoxides are readily obtained in high yields and good selectivities by ultrasonic irradiation of alkenes and sodium periodate in the presence of catalytic amounts of manganese porphyrins supported on polyvinylpyridine and IRA-900 ion-exchange resin.
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Kan Kanamori, Kazuya Nishida, Nanako Miyata, Ken-ichi Okamoto
1998 Volume 27 Issue 12 Pages
1267-1268
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The peroxovanadium(V) complex containing N-carboxymethylhistidine (cmhist) was synthesized and structurally characterized by X-ray analysis as a model compound for the vanadium-dependent haloperoxidase enzymes. The complex takes a heptacoordinate structure consisting of a quadridentate cmhist ligand, a side-on bound peroxo group, and an oxo group. The coordination polyhedron is a distorted pentagonal bipyramid.
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Yinzhong Guo, Fei Feng, Tokuji Miyashita
1998 Volume 27 Issue 12 Pages
1269-1270
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It is described that poly (N-tetradecylmethacrylamide) (PTDMA) LB films can produce directly a new type of positive fine pattern by decomposing effectively with Deep UV without any development (dry-developed resist).
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Tsugio Kitamura, Yasutaka Aoyagi, Yuzo Fujiwara
1998 Volume 27 Issue 12 Pages
1271-1272
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An arylvinyl bromide bearing a long-chain alkoxy group reacts with arylacetylenes in the presence of a palladium catalyst to give liquid-crystalline 1,4-diaryl-1-buten-3-yne derivatives. The new liquid-crystalline compounds with a conjugated enyne core show mesogenic phases at a wide range of temperature.
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S. Chandrasekhar, Y. Ravindra Reddy, Ch. Raji Reddy
1998 Volume 27 Issue 12 Pages
1273-1274
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A combination of polymethylhydrosiloxane (PMHS) and AlCl
3 was found to be a superior hydride source for reductive ring opening of cyclic benzylidene acetals of both 1,2- and 1,3-diols.
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Masayasu Iida, Tomoaki Tanase, Norie Asaoka, Akiko Nakanishi
1998 Volume 27 Issue 12 Pages
1275-1276
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Zinc complex with N-octylethylenediamine( = OE), Zn(OE)
2(NO
3)
2, was prepared and its molecular structure was determined on the basis of an X-ray crystallographic analysis. It was revealed that in the octahedral molecular structure the nitrato groups are trans and the octyl chains are transoid. Extensive aggregations of this complex in wet chloroform and wet benzene systems were also studied using
1H NMR self-diffusions for the solvents and the zinc complex.
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B. S. Uphade, Susumu Tsubota, Toshio Hayashi, Masatake Haruta
1998 Volume 27 Issue 12 Pages
1277-1278
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Gas phase selective oxidation of propylene to propylene oxide (PO) or propionaldehyde (PA) in the presence of H
2 and O
2has been carried out with a propylene conversion in the range of 0.5-3.7% over gold deposited on titanosilicates by deposition-precipitation (DP) method; PO was obtained with a selectivity above 90% at the temperature range of 50 °C-120 °C whereas PA was obtained at temperatures higher than 200 °C with a selectivity above 70% over throughly washed catalysts with low Au loadings.
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Munehiro Nakatani, Jian-Bo Zhou, Kenjiro Tadera, Hideo Naoki
1998 Volume 27 Issue 12 Pages
1279-1280
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Spirosendan, a new skeletal limonoid prossessing a spiro-structure, was isolated from the root bark of Melia toosendan (Meliaceae). The structure is proposed on the basis of extending spectroscopic means.
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Toshihiro Yamase, Haruo Naruke, Ana Maria San José Wéry, ...
1998 Volume 27 Issue 12 Pages
1281-1282
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[Eu(H
2O)
8]
3+ cations in [Eu(H
2O)
8]
2[V
10O
28]·8H
2O form an approximately square-antiprismatic configuration. This configuration provides another model for the Eu
3+ aqua ion in aqueous solutions. The lifetime of the
5D
0 state for [Eu(H
2O)
8]
3+ is 0.13 ± 0.01 ms at 4.2K, leading to a validity of the luminescence lifetime method for the determination of the number of bonded water molecules (within the Eu-O distances of 2.5Å).
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Daisuke Ito, Kenji Kubota
1998 Volume 27 Issue 12 Pages
1283-1284
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Light scattering study of poly(N-n-propylacrylamide) in a mixed solvent of 2-propanol and water was carried out. At high volume fraction (80 vol%) of 2-propanol, the scattering envelopes showed anomalous upsweep inflection at low scattering angles for finite polymer concentrations. This behavior can be elucidated in terms of the long-range repulsive interaction potential, and should correlate to the complex multiple volume phase transition of the gel in a mixed solvent.
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Hiroshi Uyama, Kojiro Inada, Shiro Kobayashi
1998 Volume 27 Issue 12 Pages
1285-1286
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Candida antarctica lipase induced polymerization of a dicarboxylic acid and glycol in a solvent-free system, despite the heterogeneous mixture of the monomers and catalyst. The chain length of the monomers strongly affected the yield and molecular weight of the product polyester.
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Hideharu Ishihara, Katsuhiro Yosimura, Mamoru Kouketsu
1998 Volume 27 Issue 12 Pages
1287-1288
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Aliphatic and aromatic primary selenoamides 2 were isolated by the reaction of the corresponding aliphatic and aromatic nitriles with potassium 4-methylselenobenzoate in the presence of BF
3·Et
2O in moderate from high yields.
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Yukio Hishikawa, Yuriko Aoki, Kazuki Sada, Mikiji Miyata
1998 Volume 27 Issue 12 Pages
1289-1290
Published: 1998
Released on J-STAGE: December 19, 2003
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The substitution of lithocholic acid (1) to lithocholamide (4) led to the finding of the formation of channel-type inclusion compounds with a limited range of organic substances, such as alcohols, ketones and so on. The inclusion behavior of 4 is greatly different from those of the known hosts of bile acids and their derivatives.
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