-
Shinji Sueda, Toshihiro Ihara, Makoto Takagi
1997 Volume 26 Issue 11 Pages
1085-1086
Published: 1997
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The DNA binding affinity of oligonucleotide carrying iminodiacetic acid (IDA) group is regulated by metal ion through cooperative dimerization mediated by formation of 2:1 complex of IDA with metal ion.
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Yasumasa Fukushima, Hiroshi Nakajima
1997 Volume 26 Issue 11 Pages
1087-1088
Published: 1997
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Polypeptides with a repeating sequence of glycine-rich sequence of spider dragline silk were synthesized in
E. Coli. The polypeptide in the solid state formed a β-sheet structure which exists in crystalline region of spider silk.
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Toshiyasu Sakakura, Kouji Ishiguro, Makoto Okano, Takeshi Sako
1997 Volume 26 Issue 11 Pages
1089-1090
Published: 1997
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Homogeneous catalysis in liquefied gas proves to be a promising approach to functionalize gaseous alkanes selectively; upon illumination, RhCl(CO)(PMe
3)
2 catalyzes carbonylation of liquefied propane at room temperature to produce butanal with high regioselectivity.
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Tetsuya Jigami, Kazuo Takimiya, Yoshio Aso, Tetsuo Otsubo
1997 Volume 26 Issue 11 Pages
1091-1092
Published: 1997
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The title selenocycle-fused tetrathiafulvalene derivatives, BES-TTF and DS-TTF have been synthesized as novel electron donors, and their conductive charge-transfer complexes have been studied. All complexes of the BES-TTF compound with TCNQ, ClO
4, and PF
6 showed very high conductivities of the order of 10
2 S cm
−1 as well as metallic temperature-dependent behavior.
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Tomoyuki Nakamura, Yasumasa Watanabe, Hiroshi Tezuka, W. Ken Busfield, ...
1997 Volume 26 Issue 11 Pages
1093-1094
Published: 1997
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A novel peroxyester, 1,1,2,2-tetramethylpropyl peroxypivalate
1b, has been synthesized and thermolyzed in cumene. The kinetic data show that the decomposition rate constant of
1b is about three times higher than that of
tert-butyl peroxypivalate. The radical trapping technique employing 1,1,3,3-tetramethyl-2,3-dihydro-1
H-isoindol-2-yloxyl has been used to study the decomposition mechanism of
1b. The results show that the thermolysis of
1b in cumene generates
tert-butyl radicals exclusively.
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Seichi Okeya, Kayo Taniguchi, Jyunko Nishimura, Yoshiaki Kusuyama, Iso ...
1997 Volume 26 Issue 11 Pages
1095-1096
Published: 1997
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Reaction of [Pd(hfac)
2] with monoximes gave new Pd complexes with one hfac-
O,O′-chelate and one hfac-oxime-
C,N-chelate,
, in which a C–O bond was formed between the
C3-bonded hfac and the
N-bonded monoxime.
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Shunsuke Mochizuki, Yoshiharu Usui, Akihiro Wakisaka
1997 Volume 26 Issue 11 Pages
1097-1098
Published: 1997
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The acid-base interaction could be visualized in the mass spectra of clusters isolated from solutions. The butyric acid-pyridine acid-base system in acetonitrile afforded clusters in which (butyric acid)
1(pyridine)
1 complex behaves like an unit species; on the contrary, the butyric acid-pyrazine system afforded clusters in which butyric acid clusters, (butyric acid)
n, hold main structure. This clear difference is reasonably related with the relatively strong and weak acid-base interactions.
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Asuka Fujii, Atsushi Iwasaki, Naohiko Mikami
1997 Volume 26 Issue 11 Pages
1099-1100
Published: 1997
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Intramolecular hydrogen-bonded OH stretching vibration for o-fluorophenol ion is observed by using a newly developed technique for infrared spectroscopy of isolated molecular ions.
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Hiroshi Sakai, Takashi Yamazaki, Toshihiko Shigematsu, Satoru Nakashim ...
1997 Volume 26 Issue 11 Pages
1101-1102
Published: 1997
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We succeeded in preparing FePS
3 intercalated with pyridine and allylamine. In the XRD patterns of the intercalates the diffraction peaks corresponding to FePS
3 were completely missing. The Mössbauer spectra are changed significantly by the intercalation, suggesting the charge transfer from guest molecules to the host matrix.
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Masahiro Miura, Takatoshi Tsuda, Tetsuya Satoh, Masakatsu Nomura
1997 Volume 26 Issue 11 Pages
1103-1104
Published: 1997
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2-Phenylphenols react with alkenes such as acrylate esters in the presence of a palladium-copper catalyst system under air to give the corresponding 6-substituted 6
H-dibenzo[
b,
d]pyran derivatives.
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Hiroshi Matsuzawa, Shuji Okada, Hiro Matsuda, Hachiro Nakanishi
1997 Volume 26 Issue 11 Pages
1105-1106
Published: 1997
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A novel polydiacetylene (PDA) was prepared from the monomer having two butadiyne parts linked by a chain of methylene units. Polymerization is solid state was performed by UV or γ-ray irradiation. From
13C NMR spectra measured using CP/MAS technique, the structure of the ladder polymer composed of two PDAs linked by methylene chains was confirmed. By X-ray diffraction experiment, crystallinity was found to be preserved even for the ladder polymer.
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Hirotsugu Kikuchi, Noritaka Yokoyama, Tisato Kajiyama
1997 Volume 26 Issue 11 Pages
1107-1108
Published: 1997
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Mechanical stretching characteristics of a single polystyrene chain in a dilute solution was investigated with atomic force microscope. An entropic elasticity expressed by the extended Langevin function was observed in a force range below 200 pN and an extension range below 60 nm.
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Hiroshi Uyama, Sakae Suda, Hirofumi Kikuchi, Shiro Kobayashi
1997 Volume 26 Issue 11 Pages
1109-1110
Published: 1997
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An immobilized lipase derived from
Candida antarctica was used as catalyst for the ring opening polymerization of lactones. A small amount of the immobilized enzyme showed the extremely efficient catalysis in the lactone polymerization. The polymerization in the presence of 1-octanol enhanced the rate of reaction.
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Kohji Yoshinaga, Yoshiro Sasao
1997 Volume 26 Issue 11 Pages
1111-1112
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Monodisperse colloidal silica particles modified by Fe(II)-bipyridyl complex-branched,
N-isopropylacrylamide-contained polymer showed self-aggregation via the ligand exchange among the particles in response to temperature elevation from 15 °C to 35 °C.
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Zhi-Chang Wang, Yan-Hui Sun
1997 Volume 26 Issue 11 Pages
1113-1114
Published: 1997
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A stepwise selective chlorination-chemical vapor transport reaction results in the efficient separation of neighboring rare earth elements La, Ce, Pr, and Nd from their binary oxide mixtures.
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Koichi Hasegawa, Shunsuke Kunugi, Masahiro Tatsumisago, Tsutomu Minami
1997 Volume 26 Issue 11 Pages
1115-1116
Published: 1997
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Thick inorganic-organic composite films composed of organically modified silica particles and polyethylene maleate were prepared by electrophoretic sol-gel deposition. The optimum amount of polyethylene maleate added was 1 mass% and that of ammonia water was 1 mass% to obtain thick films of ca. 20 μm in thickness with no open spaces among the particles.
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Shunsuke Izumi, Toshifumi Hirata
1997 Volume 26 Issue 11 Pages
1117-1118
Published: 1997
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Addition of bornyl acetate to the cultured cells of
Marchantia polymorpha caused a rapid increase of H
2O
2 and cAMP in the intracellular level. cAMP agonist (Sp-cAMPS) activated the H
2O
2 formation, while cAMP antagonist (Rp-cAMPS), protein kinase A inhibitor H-89, and Ca
2+ ions inhibited the H
2O
2 formation.
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Toshishige M. Suzuki, John O. Bomani, Hideyuki Matsunaga, Toshiro Yoko ...
1997 Volume 26 Issue 11 Pages
1119-1120
Published: 1997
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A porous spherical resin loaded with monoclinic hydrous zirconium oxide was prepared and the physico-chemical properties were examined. The zirconium loaded resin showed a strong retainment of As(III) and As(V). The removal of low concentration of arsenic to meet the demand of industrial effluent standard (0.1ppm, ppm = mg dm
−3) was achieved by the column process with the present resin.
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Takanobu Sanji, Hiroyuki Hanao, Hideki Sakurai
1997 Volume 26 Issue 11 Pages
1121-1122
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Poly(1,1,2,2,3,3,4,4-octamethyltetrasilanylenemethylene) of a highly regulated structure was synthesized by anionic ring opening polymerization of octamethyltetrasilacyclopentane. In this polymerization process, α-silyl carbanions play an important role. In this polymer, delocalization in the ground state is much important in the σ-conjugation between the tetrasilanylene units
via the methylene units.
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Jong-San Chang, Sang-Eon Park, Min Seok Park
1997 Volume 26 Issue 11 Pages
1123-1124
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In dehydrogenation of ethylbenzene with carbon dioxide over zeolite-supported iron oxide catalyst, ethylbenzene was predominantly converted into styrene by an oxidative manner. Carbon dioxide in this reaction played a role as an oxidant to greatly improve catalytic activity as well as coke resistance of catalyst.
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Takehiko Sasaki, Yuichiro Itai, Yasuhiro Iwasawa
1997 Volume 26 Issue 11 Pages
1125-1126
Published: 1997
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For the purpose of utilizing ESDIAD (Electron Stimulated Desorption Ion Angular Distribution) as a real time probe for surface chemical processes, we have developed a new instrument which can measure ESDIAD images and time of flight (TOF) spectra of desorbed ions in temperature programmed surface processes. TOF measurements are carried out to identify the mass of desorbed ions and to determine their kinetic energy distribution. This temperature-programmed (TP)-ESDIAD/TOF system was used to observe the decomposition processes of methanol on Ru(001)-p(2 × 2)-O. A halo pattern from the methyl group of methoxy species was observed at 100-200 K by the use of CH
3OD, followed by a broad pattern from the methyl group at 230-250 K, and by a near-center pattern from the oxygen atom of CO above 300 K.
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Shinya Higashimoto, Shu Guo Zhang, Hiromi Yamashita, Yasuyuki Matsumur ...
1997 Volume 26 Issue 11 Pages
1127-1128
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The vanadium silicalite-1 catalyst (VS-1) has been found to include highly dispersed V-O moieties having a tetrahedral coordination in C
3v symmetry, which exhibits a photoluminescence spectrum attributed to the radiative decay from the charge transfer excited state. Also, the photocatalytic reduction of NO into N
2 was found to proceed much more efficiently in the presence of propane than with the direct photocatalytic decomposition of NO without propane. The dynamic quenching of the photoluminescence spectrum by the addition of NO and propane indicate that the excited state of the V-O moieties plays a significant role in this photocatalytic reaction.
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Junfu Liu, Lingang Zhang, Kongzhang Yang, Zuhong Lu
1997 Volume 26 Issue 11 Pages
1129-1130
Published: 1997
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Thallic oxide (Tl
2O
3) were electrodeposited onto indium tin oxide (ITO) conducting glass substrates in alkaline solutions. It has a high catalytic activity for the anodic oxidation of sulfite (SO
32−) and thiosulfate (S
2O
32−) anions. Also it can be used for electroanalysis of nitrite ions (NO
2−) with an excellent stability and a detection limit of 4.0 × 10
−6 mol/dm
3.
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Tsutomu Osawa, Shinya Mita, Akiko Iwai, Takafumi Miyazaki, Osamu Takay ...
1997 Volume 26 Issue 11 Pages
1131-1132
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Various supported nickel catalysts were prepared from nickel acetylacetonate in a solvent-free condition, and then these catalysts were modified in the solution containing tartaric acid and NaBr. Enantio-differentiating hydrogenation of methyl acetoacetate was carried out over the resulting tartaric acid-NaBr-modified supported Ni catalysts. Maximal optical yield 86% was attained when zeolite was used as a support.
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Juan Carlos Rodríguez, Mario Rivera
1997 Volume 26 Issue 11 Pages
1133-1134
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Addition of Sodium dithionite (Na
2S
2O
4) to aqueous carbon tetrachloride solutions (∼650 mg/L) resulted in CCl
4 concentrations lower than 2.5 mg/L after 2.5 h and in undetectable concentrations after 4-5 h of reaction. The main product of the reductive dehalogenation of CCl
4 by Na
2S
2O
4 was found to be the trichloromethanesulfinate (CCl
3SO
2−) anion.
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Kousaburo Ohashi, Katuyoshi Tatenuma
1997 Volume 26 Issue 11 Pages
1135-1136
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The extraction behavior of gallium(III) with 2-methyl-5-hexyloxymethyl-8-quinolinol (HMO
6Q) and 5-hexyloxymethyl-8-quinolinol (HO
6Q) (Figure 1) into supercritical CO
2 from weakly acidic solution was investigated. The extractability of gallium(III) is appreciably dependent on the temperature and pressure of supercritical CO
2. Gallium(III) was separated fairly selectively from aluminum(III) with HMO
6Q into supercritical CO
2.
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Shiyoshi Yokoyama, Tatsuo Nakahama, Akira Otomo, Shinro Mashiko
1997 Volume 26 Issue 11 Pages
1137-1138
Published: 1997
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Dipolar dendrons constructed of electron donor/acceptor azobenzene branches and aliphatic exteriors have been synthesized. They formed the polar assemblies in a matrix of fatty acid and showed a significant increase in second-order nonlinear optical activity with an increse in branching.
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Isamu Shiina, Hayato Iwadare, Hiroki Sakoh, Yu-ichirou Tani, Masatoshi ...
1997 Volume 26 Issue 11 Pages
1139-1140
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Optically active 2α,10β-dibenzyloxy-11β-(
t-butyldimethylsiloxy)-7β-hydroxy-1α-(4-methoxybenzyloxy)–8β,15,15-trimethyl-4-methylene-
trans-bicyclo[6.4.0]dodecan-9-one
2 that corresponds to BC ring system of Taxol was prepared from 8-membered ring enone
3 in high yield
via stereoselctive Michael addition and successive intramolecular aldol cyclization. The above 8-membered ring enone
3 was synthesized from the linear optically active polyoxy-compound
4 by SmI
2-mediated intramolecular aldol cyclization.
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Akira Harada, Hiroyasu Yamaguchi, Mikiharu Kamachi
1997 Volume 26 Issue 11 Pages
1141-1142
Published: 1997
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Monoclonal antibodies (IgG and IgM) have been observed by atomic force microscopy (AFM) at room temperature depositing from solution onto a freshly cleaved highly oriented pyrolitic graphite (HOPG) surface.
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Takashi Kato, Gohta Kondo, Hideyuki Kihara
1997 Volume 26 Issue 11 Pages
1143-1144
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The supramolecular complexes of 2,6-bis(acylamino)pyridines and mesoganic compounds containing carboxylterminated alkyl chains exhibit thermally stable mesomorphic behavior due to the cooperation of two different types of hydrogen bonds.
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Benjaram M. Reddy, Ibram Ganesh, Biswajit Chowdhury
1997 Volume 26 Issue 11 Pages
1145-1146
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The vapour phase partial oxidation of 4-methylanisole to
p-anisaldehyde was investigated over binary oxide supported vanadium oxide catalysts at 623-748 K under normal atmospheric pressure. Among various catalysts the V
2O
5/Ga
2O
3-TiO
2 effectively performed this reaction with high activity and selectivity.
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Junfu Liu, Lingang Zhang, Pansong Mao, Deying Chen, Ning Gu, Jiyun Ren ...
1997 Volume 26 Issue 11 Pages
1147-1148
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Patterned colloidal Au films were assembled from aqueous solution onto photolithographed self-assembled monolayers of (3-mercaptopropyl) trimethoxysilane films on silica. The colloidal Au closely replicated the mask patterns. The self-assembly were through Au-S covalent bounding. The present approach may be applicable to assembly of microelectronic circuits and microbiosensors.
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Tsuyoshi Ichiyanagi, Satoru Kuniyama, Makoto Shimizu, Tamotsu Fujisawa
1997 Volume 26 Issue 11 Pages
1149-1150
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Regioselective ring-opening reaction of cyclopropyl ketones was conducted successfully, in which the reaction of cyclopropyl phenyl ketone with trimethylaluminum catalyzed by nickel acetylacetonate gave the ring-opening product in up to 76% yield.
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Kazutsugu Matsumoto, Megumi Shimojo, Minoru Hatanaka
1997 Volume 26 Issue 11 Pages
1151-1152
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PPL catalyzes the hydrolysis of racemic five-membered cyclic carbonates bearing a long chain with high enantioselectivity. Optically pure (
S)-(+)-8-hydroxyhexadecanoic acid is effectively synthesized starting from (
R)-4-(7-benzyloxy)heptyl-1,3-dioxolan-2-one and (
S)-9-benzyloxynonane-1,2-diol, which are prepared
via an enzymatic reaction.
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Takeo Sasaki, Takeshi Yoshimi, Miki Saga, Yuichi Ishikawa
1997 Volume 26 Issue 11 Pages
1153-1154
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Amphiphilic compounds containing carbazole and a nonlinear optical (NLO) chromophore were synthesized and a two-beam coupling experiment was performed on a mutilayered film of a mixture of these amphiphiles. Asymmetric energy exchange was observed in a mutilayered film while no exchange was observed in an amorphous one.
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Chikako Koshi, Keisuke Umakoshi, Yoichi Sasaki
1997 Volume 26 Issue 11 Pages
1155-1156
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An oxo single-bridged and a series of oxo-carboxylato di-bridged diruthenium(III) complexes, [Ru
2(μ-O)Cl
2(tpa)
2]
3+ and [Ru
2(μ-O)(μ-RCOO)(tpa)
2]
3+ (tpa = tris(2-pyridylmethyl)amine; R = CH
3, C
2H
5, C
3H
7, and C
6H
5), show comparative structural, redox, magnetic and spectroscopic properties.
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Toru Kawakami, Saburo Aimoto
1997 Volume 26 Issue 11 Pages
1157-1158
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The undesirable removal of an acetamidomethyl (Acm) group in a Cys(Acm) residue is suppressed during the segment condensation of peptides, when silver chloride is used as an activator of the thioester moiety in a partially protected peptide thioester. The rate of segment condensation is sufficiently hifgh enough for its application to practical peptide synthesis.
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Christopher G. Frost, Paul Mendonça
1997 Volume 26 Issue 11 Pages
1159-1160
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An iterative palladium catalysed cross-coupling reaction of aryl bromides with amines has been employed in the preparation of novel peptidomimetics. This is a versatile strategy with which we can demonstrate the principle of library synthesis by using a diverse range of coupling partners.
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Run-nan Shen, Yuan Kou, Fen Zhang, Jian-zhong Niu, Shu-ben Li
1997 Volume 26 Issue 11 Pages
1161-1162
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XAFS studies on this non-heme chloroperoxidase reveal that its Fe core is in a saturated six-coordinate, octahedral environment with four planer N atoms and two axial S atoms. The active site is very similar to Fe porphyrine center in P450 oxidase, but the coordinated N atoms come from amino acids of polypeptides or other molecules, but not porphyrin.
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Satoshi Tokura, Takashi Yashuda, Yusaburo Segawa, Mitsuo Kira
1997 Volume 26 Issue 11 Pages
1163-1164
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Novel σ-π alternating copolymers, poly(disilanylene-2-2′-bipyridine-5-5′-diyl) and poly(silylene-2-2′-bipyridine-5-5′-diyl) and their ruthenium complexes, were synthesized. The ruthenium complexes showed photoconductivity caused by metal-to-ligand charge-transfer excitation.
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Tsuyoshi Asahi, Hiroshi Masuhara
1997 Volume 26 Issue 11 Pages
1165-1166
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Photocoloration of microcrystalline powder of a spirooxazine compound by femtosecond laser pulse excitation, depending on its intensity, is reported with transient absorption spectral measurements of the powder. The mechanism is discussed in terms of light induced local heating and succeeding cooling of a small volume in the microcrystal.
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Takashi Sumiyoshi, Feng Wu, Toshihiko Shindo, Syohei Ueta, Sadashi Saw ...
1997 Volume 26 Issue 11 Pages
1167-1168
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The photochemistry of 9-xanthenyl radicals produced by pulse radiolysis of xanthene in 1,2-dichloroethane (1,2-DCE) and CCl
4 was studied by means of successive laser flash photolysis. Photobleaching due to chlorine atom transfer from solvents to the excited 9-xanthenyl radical was observed with quantum yields of 0.04 and 0.29 in 1,2-DCE and CCl
4, respectively.
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Shinji Inomata, Keiichi Hitomi, hiroshi Ogino
1997 Volume 26 Issue 11 Pages
1169-1170
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A mixed ligand cluster, [Cp
*3(Ph
2C
2S
2)Fe
4S
5](BF
4)·Me
2CO, was synthesized and its X-ray crystal structure was determined. From the comparison of this structure with those of Cp
*3(Ph
2C
2S
2)Fe
4S
5·THF, [Cp
*3(Ph
2C
2S
2)Fe
4S
5](PF
6)·2Me
2CO, and [Cp
*3(Ph
2C
2S
2)Fe
4S
5](PF
6)
2·Me
2CO which have been reported previously, it is concluded that the Fe
4S
5 core of the clusters is flexible and easily undergoes deformation.
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Taro Tsubomura, Akira Ishikura, Kenta Hoshino, Hiroki Narita, Ken Saka ...
1997 Volume 26 Issue 11 Pages
1171-1172
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Photo-irradiation upon the chlorobenzene solution of [Pd(PPh
3)
4] affords
trans-[PdCl
2(PPh
3)
2] and a mixture of chlorobiphenyls. In the presence of zinc and organic amines, the catalytic production of chlorobiphenyls mediated by the palladium complex was observed with irradiation of light.
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Kazushige Yamana, Satoshi Kumamoto, Hidehiko Nakano
1997 Volume 26 Issue 11 Pages
1173-1174
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Oligopyrimidines labeled by a pyrenylmethyl group at the terminal position exhibit high affinity for double helical DNA and enhanced fluorescence upon hybridization.
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Kenji Kobayashi, Takanobu Obinata, Naomichi Furukawa
1997 Volume 26 Issue 11 Pages
1175-1176
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The oxygen migration reaction between sulfur atoms in the monooxide of 1,4-bis(methylthio)benzene preceeds in the presence of CF
3CO
2H. The reaction of 1,4-bis(methylthio)benzene with its bis-sulfoxide also gives the corresponding monooxide at room temperature. A two-point bis(dithia dication) dimer is proposed as an intermediate.
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Hiroshi Tamura, Masahiro Miwa
1997 Volume 26 Issue 11 Pages
1177-1178
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Ferricenium cations showed excellent DNA cleaving activity and cytotoxic activity. Such activities depend on the acyl group introduced into the cyclopentadienyl ring.
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Takatsugu Wakahara, Wataru Ando
1997 Volume 26 Issue 11 Pages
1179-1180
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Three different types of silacyclopentadienyl anions have been obtained in the reduction of 1-methylsilole
1 with excess lithium. Treatment of lithiated solution with dimethylchlorosilane gave 2,5-bis(dimethylsilyl)silole derivatives
3a and
3b, and with trimethylchlorosilane gave 1-trimethylsilyl-1-methylsilole derivative
4 at an early stage, and 1,1-bis(trimethylsilyl)silole derivative
8 at a late stage. Silole 1,1-dianion
7 has been formed via silole 2,5-dianion
2 and silole 1-anion
5.
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Hitoshi Kasai, Hirokazu Kamatani, Yuko Yoshikawa, Shuji Okada, Hidetos ...
1997 Volume 26 Issue 11 Pages
1181-1182
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In this study, we found that, in perylene microcrystals, luminescence peak position from free-exciton state was gradually shifted to high energy side with reducing the crystal size, even if the microcrystals were fabricated by different kinds of preparation techniques. The life time of luminescence from self-trapped exciton state became shorter when the crystal size reduced. The main reason was estimated to be based on the change of lattice state.
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Takeo Sasaki, Shyuichi Hamada, Yuichi Ishikawa, Takeshi Yoshimi
1997 Volume 26 Issue 11 Pages
1183-1184
Published: 1997
Released on J-STAGE: May 01, 2005
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The photorefractive effect of the liquid crystal polymer, poly 4-methacryloyloxyhexyloxy(4′-nitrobenzylidene)aniline doped with (diethylamino)benzaldehyde diphenylhydrazone (DEH) and 2,4,7-trinitro-9-fluorenone (TNF), was investigated using a two-beam coupling experiment. A diffraction efficiency of ∼5% was obtained under an applied electric field of 20∼30 V/μm.
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