-
Nobuko Fukuda, Masaya Mitsuishi, Atsushi Aoki, Tokuji Miyashita
2001 Volume 30 Issue 5 Pages
378-379
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An anodic photocurrent due to photoinduced electron transfer between excited Ru(bpy)
32+ and triethanolamine was remarkably enhanced by light irradiation using the surface plasmon resonance on a silver electrode which was modified by amphiphilic copolymer Langmuir–Blodgett monolayer containing Ru(bpy)
32+ compared with irradiation of transmitted light.
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Akihiro Okabe, Akinori Ito, Kazuo Okumura, Chung-gi Shin
2001 Volume 30 Issue 5 Pages
380-381
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The first convenient synthesis of the main central 2,3,6-trisubstituted pyridine skeleton [protected Fragment A-B] of a macrobicyclic antibiotic, cyclothiazomycin, was achieved.
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Shin-ichi Sasaki, Akio Hashizume, Satoru Ozawa, Daniel Citterio, Naoko ...
2001 Volume 30 Issue 5 Pages
382-383
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Novel anion ionophores based on thiouronium derivatives were synthesized, and their application to ion selective electrodes (ISEs) was examined. The electrodes clearly exhibited an anti-Hofmeister selectivity pattern with enhanced selectivity for the iodide anion.
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Mamoru Fujitsuka, Koichi Fujiwara, Yasujiro Murata, Shinobu Uemura, Ma ...
2001 Volume 30 Issue 5 Pages
384-385
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Photophysical properties of C
180 “
cis-2/
cis-2/
cis-2”, a triangle triad of C
60, were investigated by various methods including a transient absorption spectroscopy. Fluorescence and triplet absorption spectra were similar to those of C
120 (C
60 dimer) and other 1, 2-adducts of C
60. On the other hand, short fluorescence lifetime and small quantum yield for the intersystem crossing process indicate that the photophysical properties of C
180 are affected by the non-radiative process in the singlet excited state.
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Fumitoshi Kakiuchi, Taisuke Sato, Kimitaka Igi, Naoto Chatani, Shinji ...
2001 Volume 30 Issue 5 Pages
386-387
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The addition of a
β C–H bond to the formyl group of aldehydes to olefins took place with the aid of Ru(H)
2(CO)(PPh
3)
3 as a catalyst. Several olefins can be used in the catalytic reaction of conjugate enals. The presence of a sterically hindered substituent at the
ortho position of benzaldehyde and the presence of an electron donating substituent appear to be important factor in accomplishing the desired coupling reaction.
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Teruaki Mukaiyama, Hisashi Maeshima, Hideki Jona
2001 Volume 30 Issue 5 Pages
388-389
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A catalytic and stereoselective glycosylation of various glycosyl acceptors with disarmed glycosyl fluorides is successfully carried out by using a combination of stannous(II) chloride (SnCl
2) and silver tetrakis(pentafluorophenyl)borate [AgB(C
6F
5)
4] as a catalyst in the coexistence of MS5A in toluene and the corresponding 1,2-
trans di- or trisaccharides were obtained in high yields.
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Teruaki Mukaiyama, Asahi Kawana, Yoshio Fukuda, Jun-ichi Matsuo
2001 Volume 30 Issue 5 Pages
390-391
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Various secondary amines were smoothly oxidized to the corresponding imines at −78 °C by using
N-tert-butylphenylsulfinimidoyl chloride and DBU.
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Tsutomu Osawa, Saori Sakai, Tadao Harada, Osamu Takayasu
2001 Volume 30 Issue 5 Pages
392-393
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The enantio-differentiating hydrogenation of methyl acetoacetate was repeated 30 times over a fine Ni powder catalyst while modifiers (optically active tartaric acid and NaBr) were directly added to the reaction media only in the first run. Over 80% optical yields were attained for the repeated runs. The addition of sodium 2-ethylhexanoate increased the optical yields in the subsequent runs. The very simple and highly durable enantio-differentiating nickel catalyst for repeated use was developed by an in situ modification.
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Ryosuke Nishida, Teruhiko Ishikawa, Seiki Saito
2001 Volume 30 Issue 5 Pages
394-395
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UV-irradiation (365 nm) on a spreaded mixture of 2-[tetra-
O-(cyanoethyl)glucopyranosyloxy]ethyl acrylate and ethylene glycol dimethacrylate onto a copper plate gave a cross-linked copolymer which exhibited extremely stable and high dielectric permittivity (
ε′) of 23 to 30 (−100 to −10 °C) and as high as 49 even at 20 °C.
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Shuang-Ding Wu, Zhengang Zhu, Jingyun Tan, Junchang Gao
2001 Volume 30 Issue 5 Pages
396-397
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Cadmium sulfide (CdS) nanowire was synthesized by a convenient ultraviolet irradiation method using hydroxyethyl cellulose as a soft template at room temperature.
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Juncheng Hu, Yong Cao, Jingfa Deng
2001 Volume 30 Issue 5 Pages
398-399
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A novel alcohothermal process has been successfully developed to prepare the thermally stable tetragonal zirconia aerogel using a cheap inorganic salt as the starting material. The results showed that the as-prepared zirconia aerogel has a high surface area and a well-developed textural mesoporosity, which is highly attractive for potential applications in heterogeneous catalysis.
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Michele Penso, Domenico Albanese, Dario Landini, Vittoria Lupi
2001 Volume 30 Issue 5 Pages
400-401
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Ethyl
cis- and
trans-3-phenylglycidates have been opened stereo- and regioselectively with trifluoromethylsulfonamide in the presence of catalytic amounts of solid sodium carbonate. Under these conditions, (2
R,3
R)-3-phenylglycidate produces exclusively ethyl (2
R,3
S)-3-
N(trifluoromethanesulfonyl)amino-2-hydroxy-3-phenylpropionate deriving from the attack of the nucleophile on the C-3 carbon atom.
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Tomoo Sato, Fusahiro Tsugawa, Toshinori Tomita, Mitsuo Kawasaki
2001 Volume 30 Issue 5 Pages
402-403
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We have found, for the first time, a unique spectroscopic property of noble metal nano-particles (colloidal silver in solution or noble metal island film) covered with a J-aggregate monolayer. The spectral dip or hole at the position of the J-band was observed in the surface plasmon band. The appearance of the hole was related to the interaction between the surface plasmon of the noble metal nano-particles and the Frenkel exciton of the J-aggregate.
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Hongshan Luo, Hexing Li, Li Zhuang
2001 Volume 30 Issue 5 Pages
404-405
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The ultrafine Ni–Co–B amorphous catalysts were employed in liquid-phase furfural hydrogenation, which showed higher activity and better selectivity to furfuryl alcohol than either Ni–B, or Co–B, or the mixture of Ni–B and Co–B catalysts. The promoting effect of Co-dopant was briefly discussed.
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Christopher J. Ward, Prakash Patel, Tony D. James
2001 Volume 30 Issue 5 Pages
406-407
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An azo dye molecule with a boronic acid receptor unit has been used to create a fluoride selective colour sensor.
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Seongyun Moon, Yasunari Maekawa, Masaru Yoshida
2001 Volume 30 Issue 5 Pages
408-409
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The electron beam irradiation of triphenylsulfonium methanesulfonate in the crystalline state provides a new benzene-substituted sulfonium salt. This product has not been observed either by photolysis in the crystalline state nor by electron beam irradiation in a solution. The formation of the substitution product was confirmed by GC–MS analysis.
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Yoriko Sonoda, Akira Miyazawa, Shigenobu Hayashi, Masako Sakuragi
2001 Volume 30 Issue 5 Pages
410-411
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Crystalline powder of all-
trans-1,6-bis(4-R-phenyl)-1,3,5-hexatriene (R = CHO and CN) underwent intermolecular [2+2] photocycloaddition at the 1,2-position of the triene to give mirror symmetric dimers. For the formyl derivative the presence of C–H···O hydrogen bonds was suggested by IR and
13C CP/MAS NMR spectra.
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Takane Imaoka, Shinsuke Nakazawa, Kimihisa Yamamoto
2001 Volume 30 Issue 5 Pages
412-413
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The mixing of CoTPPS with RuTMPyP (Figure 1) in water or organic solvents (DMSO, acetonitrile) results in dimerization through an electrostatic interaction. The dimeric porphyrin acts as an excellent catalyst for the 4-electron reduction of dioxygen in Nafion film, in which the multi-electron transfer is accelerated through the π-orbital overlapping.
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Keiichi Tsukahara, Mari Nishimine, Kimiko Kiguchi, Yuka Shioyama, Miho ...
2001 Volume 30 Issue 5 Pages
414-415
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Myoglobin, whose lysine residues are linked with diethylenetriaminepentaacetatocobaltate(III) complexes, was prepared and characterized.
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Yasuo Norikane, Tatsuo Arai
2001 Volume 30 Issue 5 Pages
416-417
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Behavior of 5-hydroxyflavone (5HF) in the excited triplet state was studied for the first time by transient absorption and phosphorescence spectroscopies. 5HF underwent the intramolecular hydrogen atom transfer in the excited triplet state at room temperature.
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Yoshifumi Kanosue, Yoshikazu Hiraga, Satoshi Kojima, Katsuo Ohkata
2001 Volume 30 Issue 5 Pages
418-419
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In the hydrolysis of several dipeptides by carboxypeptidase-Y (CPD-Y), there was found a good linear relationship (
r = 0.999) between Michaelis–Menten constant
Km and hydrophobicity of the substrates evaluated as relative elution volume in reversed-phase HPLC.
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Yoshio Aso, Takashi Okai, Yohei Kawaguchi, Tetsuo Otsubo
2001 Volume 30 Issue 5 Pages
420-421
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Ter- and quaterthiophenes bearing pyrenes at the terminal α or β positions have been synthesized as novel emitting materials in organic electroluminescence devices. The efficient single-layer EL devices of these compounds are fabricated by use of an Al/ultrathin LiF bilayer cathode. One of them exhibits a maximum luminance of 1860 cd/m
2 and a luminous efficiency of 0.15 lm/W, which are of the highest performance class among single-organic-layer EL devices.
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Fumitoshi Kakiuchi, Kimitaka Igi, Mitsutaka Matsumoto, Naoto Chatani, ...
2001 Volume 30 Issue 5 Pages
422-423
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The reaction of aryloxazolines with trialkylhydrosilanes using Ru
3(CO)
12 or Ru(H)
2(CO)(PPh
3)
3 complex as a catalyst resulted in dehydrogenative silylation to form
ortho silylated aryloxazolines in good to excellent yields. This reaction can be applied to aryloxazolines having either electron-donating (Nme
2, Ome, and CH
3) or -withdrawing (CF
3 and F) groups.
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Masakazu Nakano, Wataru Kikuchi, Jun-ichi Matsuo, Teruaki Mukaiyama
2001 Volume 30 Issue 5 Pages
424-425
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2-(4-Methoxybenzyloxy)-3-nitropyridine (PMBONPy), easily prepared from 2-chloro-3-nitropyridine and
p-methoxybenzyl (PMB) alcohol, reacts with various types of hydroxy groups in the presence of a catalytic amount of trimethylsilyl triflate (Me
3SiOTf) to give the corresponding PMB ethers in high yields under mild conditions.
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Hideki Jona, Hiroki Mandai, Teruaki Mukaiyama
2001 Volume 30 Issue 5 Pages
426-427
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A catalytic and stereoselective glycosylation with glucosyl fluoride was effectively performed by using a catalytic amount of various protic acids. When the glycosylation was carried out, for example, using perchloric acid (HClO
4) in diethyl ether (Et
2O), the major products were
α-glycosides while
β-stereoselectivity was observed when tetrakis(pentafluorophenyl)boric acid [HB(C
6F
5)
4]
was used in a mixed solvent of trifluoromethylbenzene (BTF)–pivalonitrile (
tBuCN) = (5:1). The stereoselectivity was controlled by not only the effect of solvent but also by the nature of counter anion of the catalyst such as B(C
6F
5)
4− or ClO
4−.
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Masaru Sugiura, Katsunori Tsunoda, Hirofumi Yajima, Tadahiro Ishii, Hi ...
2001 Volume 30 Issue 5 Pages
428-429
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The formation of nap-type structures induced by UV-laser irradiation of renatured gelatin films with various triple helix contents was observed by an atomic force microscope. Surface topography was found to be dependent on degree of helix content (DHC), fluence, and number of applied pulses (PN). The surface roughness (R
a) increased with PN following a hyperbolic curve for the renatured gelatin films with DHC of more than ca. 7%. The increment of R
a tended to be depressed with increasing DHC.
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J. S. Yadav, B. V. Subba Reddy, K. Srinivasa Reddy
2001 Volume 30 Issue 5 Pages
430-431
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A facile chemoselective hydrolysis of terminal isopropylidene acetals has been achieved using a catalytic amount of Yb(Otf)
3·H
2O in acetonitrile at ambient temperature.
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Kazunobu Kira, Minoru Isobe
2001 Volume 30 Issue 5 Pages
432-433
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Stereospecific ring opening reactions of cyclic
α,
β-epoxysilanes are described. The reaction pathways are governed by the conformation of the cation intermediates in oxepane.
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Yinhai Wang, Jimei Mo, Weili Cai, Lianzeng Yao, Lide Zhang
2001 Volume 30 Issue 5 Pages
434-435
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Recently, we find a novel route to prepare nano-Hg
2Cl
2 in the pores of alumina membrane. To the best of our knowledge, it is first time for preparing nano-Hg
2Cl
2 arrays. The nano-Hg
2Cl
2 has a potential application as nanoelectrode.
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Kenji Matsuda, Mitsuyoshi Matsuo, Masahiro Irie
2001 Volume 30 Issue 5 Pages
436-437
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Photochromic 1,2-bis(2-methyl-1-benzothiophen-3-yl)perfluorocyclopentene having two nitronyl nitroxide radicals with a thiophene-2,5-diyl spacer was prepared and the intramolecular magnetic interaction was compared with the derivative having the radicals with a
p-phenylene spacer. The stronger magnetic interaction was observed for the compound with the thiophene spacer.
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Nadukkudy V. Eldho, Joshy Joseph, Danaboyina Ramaiah
2001 Volume 30 Issue 5 Pages
438-439
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Two novel water soluble tolylacridines having viologen at the
para and
ortho to the acridine chromophore have been synthesized. Photophysical and DNA binding studies have revealed that the
para-isomer exists in the extended conformation and binds to DNA by partial intercalation whereas the
ortho-isomer exists both in folded and extended conformations and fails to interact with DNA.
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Kenji Arakawa, Tadashi Eguchi, Katsumi Kakinuma
2001 Volume 30 Issue 5 Pages
440-441
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The thermostability of liposomes comprising from a 1:1 mixture of archaeal 72-membered macrocyclic tetraether diphospholipids was investigated for the first time in comparison with those of acyclic and 36-membered macrocyclic diether phospholipids. The liposomes of the former 72-membered macrocyclic lipid certainly form thermostable liposomes.
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Masaya Miyazaki, Hiroyuki Nakamura, Hideaki Maeda
2001 Volume 30 Issue 5 Pages
442-443
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Trypsin-catalyzed hydrolysis of benzoylarginine-
p-nitroanilide using a microchanel reactor showed higher yield than batchwise reaction at lower enzyme concentration. The rate of reaction seemed to be 20 times greater than that in the batchwise system.
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Shinichi Saito, Yukiyasu Chounan, Tsutomu Nogami, Osamu Ohmori, Yoshin ...
2001 Volume 30 Issue 5 Pages
444-445
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We carried out the benzannulation (cyclodimerization) of conjugated enynes in fluorous biphasic system in the presence of perfluoro-tagged palladium catalyst and succeeded in reusing the catalyst for several times.
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Nobuhito Imanaka, Tomohiro Ueda, Gin-ya Adachi
2001 Volume 30 Issue 5 Pages
446-447
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A tetravalent cation conductor whose ionic conductivity is extraordinary high and comparable to the conductivity range of the representative divalent oxide anion conductors, was artificially designed by strictly choosing the constituent elements and the structure of the solid. Promising applications such as rechargeable batteries and chemical sensors for a global environmental monitoring, are greatly expected.
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Naoki Haga, Hiroaki Takayanagi, Katsumi Tokumaru
2001 Volume 30 Issue 5 Pages
448-449
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Irradiation of acenaphthylene (ACN) and
p-chloranil with > 420 nm light in 1,2-dichloroethane gives two interconvertible anomeric naphthopyranylhemiacetals in high yields (> 70%), whereas irradiation of ACN with other 1,4-benzoquinones does not afford this type of products. The above products will result from photochemical formation of an oxetane followed by its hydration. These products are stereoselectively converted into an identical naphthopyranylacetal in primary alcohols.
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Hayao Imamura, Kouzi Nishimura, Kenji Sumioki, Mitoshi Fujimoto, Yoshi ...
2001 Volume 30 Issue 5 Pages
450-451
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Lanthanide precipitates obtained by decomposition of Eu or Yb metal solutions in liquid ammonia were active at 393 K for the partial liquid-phase hydrogenation of benzene to cyclohexene with high selectivity (≥90%). When the reaction temperature decreased to 323 K, cyclohexadienes were preferentially formed. The reducing behavior was markedly enhanced by the addition of ammonia to the reaction system.
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Hiromi Matsuhashi, Hidenori Miyazaki, Kazushi Arata
2001 Volume 30 Issue 5 Pages
452-453
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A highly active solid superacid of sulfated tin oxide was prepared from tin oxide gel which was precipitated from SnCl
4 solution and washed with aqueous ammonium acetate solution. The sulfated tin oxide showed activity much higher than the sulfated zirconia, a well known solid superacid, for the skeletal isomerization of
n-pentane, and its acid strength estimated by temperature-programmed desorption using argon was also higher than that of the latter.
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Etsushi Nishikawa, Jun Yamamoto, Hiroshi Yokoyama
2001 Volume 30 Issue 5 Pages
454-455
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A benzoic acid derivative having a long flexible fluorinated chain is synthesized. The material dimerizing through hydrogen bonding shows a smectic C phase at room temperature. The acid/base complex with 4,4′-dipyridyl exhibits a thermotropic liquid crystalline cubic phase. Flexibility of the fluorinated substituent and incompatibility with the hard aromatic cores are crucial factors to form a cubic phase.
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Guochun Zhang, Yicheng Wu, Peizhen Fu, Guofu Wang, Shilie Pan, Chuangt ...
2001 Volume 30 Issue 5 Pages
456-457
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A new nonlinear optical (NLO) borate crystal Na
3La
2(BO
3)
3 (sodium lanthanum borate, NLBO) has been discovered. The bar-shaped crystal with sizes up to 8 × 3 × 2 mm
3 was grown by the Top-Seeded Solution Growth (TSSG) method using Na
2CO
3–H
3BO
3–NaF as fluxes. The measurement of the infrared spectrum indicated that the basic anionic group is the BO
3 group. Furthermore, NLBO crystal exhibits an optical second harmonic generation effect about twice as large as that of KDP(KH
2PO
4).
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Yonghong Ni, Xuewu Ge, Huarong Liu, Zhicheng Zhang, Qiang Ye, Feng Wan ...
2001 Volume 30 Issue 5 Pages
458-459
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Nano-rod copper-polymer composites were synthesized by γ-irradiation in a heterogeneous solution system under atmospheric pressure at room temperature. The product was characterized by XRD, TEM and IR spectrum, respectively. The investigation showed that a rather low dose rate of irradiation was necessary in the formation of nano-rod composites.
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Kiyoharu Nakagawa, Hiroaki Nishimoto, Yuji Enoki, Sayaka Egashira, Na- ...
2001 Volume 30 Issue 5 Pages
460-461
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Oxidized diamond gave the best performance among the support materials of Ni loaded catalysts for the partial oxidation of methane. Ni(5 wt%)/oxidized diamond afforded 20% conversion of methane (CH
4/O
2 = 5) to give CO and H
2 ratio of 2.0 at 873 K. Ni(5 wt%)/oxidized diamond also showed high catalytic activity for the CO
2 reforming of methane.
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Guo Xueyi, Katsutoshi Inoue, Kenji Mishima
2001 Volume 30 Issue 5 Pages
462-463
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The removal of lead from vermiculite by means of elution with two kinds of novel chemical reagents
L-asparaginic-
N,N-diacetic acid and depolymerized pectic acid, was investigated. The effects of contact time, concentration of the reagents and equilibrium pH of solution on elution of lead were examined by batch-wise technique. It was found that both of the reagents are effective for the removal of lead and have the potential application for the remediation of soil polluted by heavy metals.
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Zhang Zhaoliang, Ma Jun, Liu Zhaoqong, Ren Shaoling, Yang Xiyao, Kou Y ...
2001 Volume 30 Issue 5 Pages
464-465
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Cobalt sulfide and titanium-promoted cobalt sulfides were reported as catalysts for NO decomposition and reduction by CO. Titanium-promoted cobalt sulfides showed not only nearly complete NO removal but the simultaneous catalytic reduction of NO and SO
2 by CO to N
2 and elemental sulfur, respectively.
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Jun-ichi Yamaguchi, Takashi Aoyagi, Ryohei Fujikura, Takayuki Suyama
2001 Volume 30 Issue 5 Pages
466-467
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Reactions of hydrazides or
N′-phenylhydrazides with a copper(II) reagent prepared from copper(II) bromide and lithium
t-butoxide smoothly proceeded to give the corresponding
t-butyl ester in high yield.
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Xia Ding, Katsumi Taniguchi, Yutaka Ukaji, Katsuhiko Inomata
2001 Volume 30 Issue 5 Pages
468-469
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A highly diastereo- and enantioselective 1,3-dipolar cycloaddition of nitrones bearing an amide moiety to allyl alcohol has been realized by using a catalytic amount of diisopropyl (
R,R)-tartrate as a chiral auxiliary. Addition of amine
N-oxide such as pyridine
N-oxide, was crucial to realize a reproducible excellent enantioselectivity up to 98% ee.
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Kyoko Tsuji, Shuji Okada, Hidetoshi Oikawa, Hiro Matsuda, Hachiro Naka ...
2001 Volume 30 Issue 5 Pages
470-471
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The first hyperpolarizabilities (
β) of styrylpyrylium derivatives were systematically investigated by hyper-Rayleigh scattering experiments and semiempirical calculation in relation to their absorption. They were found to be potential second-order nonlinear optical species covering the longer cutoff-wavelength range compared with the corresponding stilbazolium derivatives.
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Yoshihito Inai, Tatsuo Oshikawa, Mitsuji Yamashita, Itsuki Kato, Tadam ...
2001 Volume 30 Issue 5 Pages
472-473
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Hexapeptide Boc-(
D-Ala-Δ
ZPhe-
L-Ala)
2-OCH
3 [Boc =
tert-butyloxycarbonyl; Δ
ZPhe = (
Z)-
β-phenyldehydroalanine] in the solid state exhibited a novel looping backbone consisting of three partially overlapped β-turns supported by intramolecular (
i+3) →
i hydrogen bonds. Here the looping backbone also included a β-bend ribbon structure.
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Anjie Wang, Xiang Li, Yongying Chen, Difei Han, Yao Wang, Yongkang Hu, ...
2001 Volume 30 Issue 5 Pages
474-475
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A deep HDS catalyst, exhibiting considerably high activity in desulfurizing dibenzothiophene and a high-sulfur gas oil, was prepared by depositing Ni–W species over siliceous MCM-41.
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Anugula Mahipal Reddy, Shinobu Tsutsui, Kenkichi Sakamoto
2001 Volume 30 Issue 5 Pages
476-477
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A series of 2-silyl- and 2-disilanyl-substituted 2-aryl-1,3-dithiane derivatives were prepared by the reactions of 2-aryl-2-lithio-1,3-dithianes with the corresponding chlorosilanes. Photolysis of 2-phenyl-2-(pentamethyldisilanyl)-1,3-dithiane resulted in the intermediary formation of 1,1-dimethyl-2-phenyl-2-(trimethylsilyl)-1-silaethene.
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