-
Tsukasa Hatano, Masayuki Takeuchi, Atsushi Ikeda, Seiji Shinkai
2003 Volume 32 Issue 4 Pages
314-315
Published: 2003
Released on J-STAGE: April 05, 2003
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It was found that 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (TPPS), which is known to aggregate in a one-dimensional direction in water, acted as a template for electrochemical polymerization of aniline on ITO electrode. Examinations using cyclic voltammetry (CV) and UV–vis spectroscopy established that J-aggregated TPPS molecules were entrapped in the resultant poly(aniline). Scanning electron microscopy (SEM) observation established that poly(aniline) grew up to a nanosized rod-like structure, reflecting the aggregation structure of TPPS. It is a very novel and important finding that poly(aniline), which has been believed to result in only “rigid” film, can be morphologically controlled using a “template method”.
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Jingshi Shi, Feng Hua, Tianhong Cui, Yuri M. Lvov
2003 Volume 32 Issue 4 Pages
316-317
Published: 2003
Released on J-STAGE: March 03, 2003
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Alternate layer-by-layer self-assembly of linear polyions and colloidal silica at elevated temperatures has been investigated by QCM and SEM. A growth step at 90 °C for these multilayers was about 100–200% larger than the one at 20 °C.
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Taku Satoh, Leonid Vladimirov, Masayoshi Johmen, Nobuo Sakairi
2003 Volume 32 Issue 4 Pages
318-319
Published: 2003
Released on J-STAGE: March 03, 2003
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Complete N-acylation of chitosan has been achieved by treating with cyclic acid anhydrides in aqueous homogeneous media at pH 4 to 8. Some of the resulting
N-(carboxy)acyl chitosans were successfully converted into the corresponding imido forms by thermal dehydration.
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Fumitaka Narumi, Waka Yamabuki, Tetsutaro Hattori, Hiroshi Kameyama, S ...
2003 Volume 32 Issue 4 Pages
320-321
Published: 2003
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Proximally
O,
O′-disiloxane-bridged calix[4]arene (
1) was treated with benzyl bromide in the presence of Cs
2CO
3 to afford, after desilylation,
anti-
O,
O′-dibenzylcalix[4]arene (
4a) in 90% yield. Chromatographic separation of its diastereomeric (
S)-2-methoxy-2-(1-naphthyl)propionic esters allowed the first optical resolution of this kind of dialkylated calix[4]arenes.
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Takeshi Kawase, Tohru Iwata, Masaji Oda
2003 Volume 32 Issue 4 Pages
322-323
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Treatment of 3-lithiophenyldicyanomethide ions with Michler’s ketone afforded the title compounds as stable crystals upon weak-acidic work-up. The molecular structure and spectroscopic data reveal the zwitterionic nature of the compounds.
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Yongnan Zhao, Jung-Ho Son, Young-Uk Kwon
2003 Volume 32 Issue 4 Pages
324-325
Published: 2003
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An open-framework zincophosphate has been synthesized under hydrothermal conditions; its structure is constructed by PO
4, ZnO
4 and ZnO
6 groups; the linkage of PO
4 and ZnO
4 give rise to a sheet structure that is pillared by ZnO
6 forming a two-dimensional intersecting channel system.
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Duangamol Nuntasri, Peng Wu, Takashi Tatsumi
2003 Volume 32 Issue 4 Pages
326-327
Published: 2003
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A novel titanosilicate, prepared by the partial delamination of acid-treated Ti-MWW, possesses an extremely high specific surface area and proves to be a selective and active liquid-phase oxidation catalyst for bulky alkenes.
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Yan Yin, Jianhua Fang, Hidetoshi Kita, Ken-ichi Okamoto
2003 Volume 32 Issue 4 Pages
328-329
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A novel sulfoalkoxylated diamine, 2,2′-bis(3-sulfopropoxy)benzidine (2,2′-BSPB) was successfully synthesized and the sulfonated polyimide was prepared from this diamine and 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTDA). The resulting polyimide membrane displayed high proton conducting performance and excellent water stability, indicating potential application for polymer electrolyte fuel cells.
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Tsutomu Umebayashi, Tetsuya Yamaki, Sigeru Tanaka, Keisuke Asai
2003 Volume 32 Issue 4 Pages
330-331
Published: 2003
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A sulfur (S)-doped titanium dioxide (TiO
2) photocatalyst was synthesized by oxidative annealing of titanium disulfide (TiS
2). TiS
2 turned into anatase TiO
2 when annealed in air. The residual S atoms occupied O-atom sites in the TiO
2 to form Ti–S bonds. The S doping caused the absorption edge of TiO
2 to be shifted into the lower energy region. Consequently, methylene blue adsorbed on the S-doped TiO
2 was photocatalytically decomposed by visible light irradiation.
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Kazumasa Kajiyama, Atsushi Nakamoto, Shunsuke Miyazawa, Takeshi Ken Mi ...
2003 Volume 32 Issue 4 Pages
332-333
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A phosphoranido iridium(III) complex is prepared by the reaction of Cp
*IrCl
2(PMe
3) with lithium phosphoranide generated from a P–H spirophosphorane bearing two 8-oxy-1-naphthyl groups. The complex is thermally converted into metallaphosphacyclo complexes with diastereoselectivity.
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-
Takakazu Yamamoto
2003 Volume 32 Issue 4 Pages
334-335
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Poly(3-hexylthiophene-2,5-diyl), P3HexTh, was p-doped by sulfonic acids such as CH
3SO
3H in the presence of O
2. In the case of regioregular head-to-tail type P3HexTh, molecular assembly took place prior to the p-doping. Tetramer and pentamer of thiophene underwent similar oxidation.
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Akio Nakamoto, Yuuki Ono, Norimichi Kojima, Daiju Matsumura, Toshihiko ...
2003 Volume 32 Issue 4 Pages
336-337
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We have synthesized [Fe
II(H-trz)
3]
n complex film by using ion-exchange resin(Nafion) as counter anion, and have found the spin crossover phenomenon about at 260 K. Moreover, we have proved the existence of straight one-dimensional Fe chain structure of [Fe
II(H-trz)
3]
n on Nafion by means of EXAFS.
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Jian Hua Zhu, Shi-Lu Zhou, Yang Xu, Yi Cao, Yi-Lun Wei
2003 Volume 32 Issue 4 Pages
338-339
Published: 2003
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Temperature-programmed surface reaction (TPSR) of
N′-nitrosonornicotine (NNN) was firstly reported on zeolite and ordered mesoporous materials. Among the catalysts SBA-15 and MCM-48 exhibited an activity much higher than zeolite NaY. They could also adsorb nitrosamines without interference of organic solvent, which will be helpful for environmental protection.
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Teruaki Mukaiyama, Takashi Hashihayata, Hiroki Mandai
2003 Volume 32 Issue 4 Pages
340-341
Published: 2003
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Highly β-stereoselective glycosylations of glycosyl acceptors having a primary hydroxyl group by using a novel glycosyl donor, α-glycosyl 6-nitro-2-benzothiazoate (
3), proceeded smoothly in the presence of a catalytic amount of trifluoromethanesulfonic acid (TfOH) in CH
2Cl
2 at −78 °C to afford the corresponding glycosides in high yields. The donor
3 gave β-saccharides more dominantly compared with those using other α-glycosyl donors such as thioform- and trichloroacet-imidates or fluoride under the same conditions.
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Atsushi Seki, Youichi Takizawa, Fusae Ishiwata, Masatoshi Asami
2003 Volume 32 Issue 4 Pages
342-343
Published: 2003
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Polymer-bound lithium amides were used in an aldol reaction. The introduction of a spacer between the polymer backbone and the reactive site was important to enhance yields of the aldol products. The polymer-bound reagent was repeatedly used in the same reaction after the conversion to the lithium amide.
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Sang Jun Yoon, Huen Lee
2003 Volume 32 Issue 4 Pages
344-345
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The donor property changes of amines by methyl or hydroxyl substituents were studied by NMR and FT-IR spectroscopies. This fundamental investigation can contribute for identifying CO
2 absorption capacity of amine solution mainly due to electron releasing and withdrawing effects of substituents.
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Kenji Toda, Yu-ichiro Imanari, Takashi Nonogawa, Kazuyoshi Uematsu, Mi ...
2003 Volume 32 Issue 4 Pages
346-347
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The synthesis and luminescence properties of Eu
3+-doped ordered olivine-type NaLnGeO
4 (Ln = rare earth) phosphors are reported. Under vacuum-UV (VUV) excitation, this phosphor showed intense red emission due to the
5D
0-
7F
2 transition. The Na(Y
0.3Gd
0.65Eu
0.05)GeO
4 phosphor with optimum composition and synthetic condition under 147 nm excitation were higher than those of (Y
0.95Eu
0.05)
2O
3.
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Kristóf Vízvárdi, Christian Kreutz, Alexander S. ...
2003 Volume 32 Issue 4 Pages
348-349
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N-Glycosyl asparagines were synthesized by a mild photochemical coupling method in which a photoreactive amide of an aspartic acid’s β-carboxyl group is condensed with an aminosaccharide. Upon excitation, the γ-carbon becomes susceptible to nucleophilic attack and the obtained
N-glycosyl asparagines, which may be useful building blocks for the synthesis of
N-glycopeptides and neoglycopeptides, are generated in good yields.
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Liying Zhu, Xiuwen Zheng, Xing Yin, Xiang Liu, Yunbo Jia, Yi Xie
2003 Volume 32 Issue 4 Pages
350-351
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Bismuth selenoiodide (BiSeI) millimeter-scale rod-like crystals were synthesized for the first time via a mild solution route based on the reactions of BiCl
3, Se with NaI or Bi
2Se
3 with BiI
3 in ethanol solvent at 200 °C. A possible growth mechanism of the rod-like BiSeI was proposed.
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Norifumi Fujita, Hideyuki Otsuka, Atsushi Takahara, Seiji Shinkai
2003 Volume 32 Issue 4 Pages
352-353
Published: 2003
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Sol-gel polycondensation of tetraethyl orthosilicate (TEOS) was carried out on the cast film of poly(styrene-
b-4-vinylpyridine) under basic (benzylamine), acidic (AcOH), and neutral (no catalyst) conditions. It was found that only under the acidic and neutral conditions, the phase-separated periodic structure of the copolymer is finely transcribed into the silica. This is a new, convenient method to create the thin, mosaic film from inorganic materials.
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Kazufumi Omura, Masakazu Murakami, Tatsuya Uchida, Ryo Irie, Tsutomu K ...
2003 Volume 32 Issue 4 Pages
354-355
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(
R,
R)-Ru(salen)(CO) complex (
1) was found to catalyze enantioselective aziridination of conjugated terminal olefins and allylic C–H amination of conjugated olefins bearing geminal- and/or
trans-substituent(s) in the presence of
p-toluenesulfonyl azide.
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Fangming Jin, Jianxun Cao, Heiji Enomoto, Takehiko Moriya
2003 Volume 32 Issue 4 Pages
356-357
Published: 2003
Released on J-STAGE: March 19, 2003
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Sebacic and azelaic acids were oxidized in a batch reactor at 400 °C to study the oxidation pathways and mechanisms of dicarboxylic acids in supercritical water. The reaction of dicarboxylic acids proceeds with the consecutive oxidation of higher to lower molecular weight dicarboxylic acids through α-, β- and γ-oxidations, as do monocarboxylic acids. The oxidation of dicarboxylic acids is also accompanied by decarboxylation, leading to the formation of monocarboxylic acids. Decarboxylation occurred only when some oxygen was supplied.
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Shu Yin, Qiwu Zhang, Fumio Saito, Tsugio Sato
2003 Volume 32 Issue 4 Pages
358-359
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Nitrogen-doped yellowish rutile titania prepared by high energy ball milling of P-25 titania - 5% HMT (Hexamethylenetetramine, C
6H
12N
4) mixed powders followed by calcination in air at 400 °C possessed two absorption edges around 400 and 540 nm and showed excellent photocatalytic ability for nitrogen monoxide oxidization under irradiation of the visible light of wavelength >510 nm.
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Klaus Banert, Manfred Hagedorn, Jana Schlott
2003 Volume 32 Issue 4 Pages
360-361
Published: 2003
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Several propargylhydrazines were prepared and then oxidized by manganese dioxide to generate short-lived 1,1-diazenes, which produced novel allenyl azo compounds (
8) through [2,3] sigmatropic rearrangement. Isomerization of
8 or nucleophilic addition to the title compounds lead to hydrazones as well as pyrazole derivatives.
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Keshu Wan, Qian Liu, Cunman Zhang
2003 Volume 32 Issue 4 Pages
362-363
Published: 2003
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Mesoporous silicon oxynitride materials, which were highly ordered and had high nitrogen content, were prepared by heat treatment of fresh SBA15 precursors in flowing ammonium at high temperatures.
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Teruhisa Ohno, Takahiro Mitsui, Michio Matsumura
2003 Volume 32 Issue 4 Pages
364-365
Published: 2003
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In order to effectively utilize visible light in photocatalytic reactions, we have developed S-doped TiO
2 particles. They show strong absorption for visible light and high activities for degradation of methylene blue in aqueous solution under irradiation at wavelengths longer than 440 nm. The oxidation state of the S atoms incorporated into the TiO
2 particles is determined to be S
6+ from the XPS spectra.
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Brindaban C. Ranu, Jyotirmoy Dutta, Arijit Das
2003 Volume 32 Issue 4 Pages
366-367
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A trace of an aqueous solution of zinc tetrafluoroborate was demonstrated to catalyze the conversion of an aldehyde to its 1,1-diacetate by acetic anhydride without any solvent. A similar reaction of an aldehyde with a mixture of potassium cyanide and acetic anhydride in methylene chloride was also catalyzed by Zn(BF
4)
2 to provide the corresponding geminal cyanoacetate.
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Jun Yamauchi, Hideyuki Tsuji, Naoko Sakai, Yoshiko Kawamura
2003 Volume 32 Issue 4 Pages
368-369
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Magnetic susceptibility was studied on a Ni(II) cyclam complex with iodide, which exhibited an anomalous temperature variation. A diamagnetic spin state at room temperature made a transition into a paramagnetic state below ca. 50 K, and the magnetic susceptibility increased continuously toward a liquid helium temperature. An ESR observation was in good agreement with this magnetic behavior. This finding is unusual in spin crossover phenomena in transition metal ions.
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Kensei Yasuda, Kiyonori Shinoda
2003 Volume 32 Issue 4 Pages
370-371
Published: 2003
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o-Dichlorobenzene (
o-DCB) was perfectly converted into benzene and hydrogen chloride by dechlorination with cyclohexane at 300 °C over activated carbon-supported palladium(II) chloride and cerium(III) chloride. The long term stability of catalyst was assessed.
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Jun-ichi Yamaguchi, Masakazu Harada, Takahito Kondo, Takeshi Noda, Tak ...
2003 Volume 32 Issue 4 Pages
372-373
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Treatment of
N-(4-nitrophenoxycarbonyl)amino acid amide, which was prepared from amino acid amide and 4-nitrophenyl chloroformate, under weakly basic conditions proceeded to afford the corresponding hydantoin. A direct conversion of amino acid amide into hydantoin without isolation of
N-(4-nitophenoxycarbonyl)amino acid amide was also accomplished.
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Yoichi Tachibana, Motoichi Kurisawa, Hiroshi Uyama, Toyoji Kakuchi, Sh ...
2003 Volume 32 Issue 4 Pages
374-375
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Thermoresponsive hydrogels based on biodegradable poly(amino acid)s have been developed by crosslinking of poly(
N-(ω-hydroxyalkyl) α/β-asparagine)s with diisocyanate. The poly(amino acid) hydrogels showed a thermoresponsive release of a model drug.
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Insook Park, Yun Hee Jang, Sungu Hwang, Doo Soo Chung
2003 Volume 32 Issue 4 Pages
376-377
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A Poisson–Boltzmann continuum solvation model coupled with ab initio quantum calculation was developed for 1-octanol. It was applied to the calculation of the solvation free energies of various solutes consisting of C, H, and O in 1-octanol and their 1-octanol/water partition coefficients.
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Baitao Li, Xiaohong Li, Kenji Asami, Kaoru Fujimoto
2003 Volume 32 Issue 4 Pages
378-379
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Hydroformylation of 1-hexene on rhodium catalyst was studied under mild reaction conditions (
P=3.0 MPa, CO/H
2 = 1/1,
T=403 K). Its hydroformylation performances were investigated in a variety of solvent. It was found that the excellent activity for the heterogeneous catalyst was showed in the
n-octane solvent, while poor activity in the alcoholic and H
2O solvent.
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Kenkichi Sakamoto, Takehiko Naruoka, Mitsuo Kira
2003 Volume 32 Issue 4 Pages
380-381
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An absorption and emission spectroscopic study of an inclusion complex of permethyldecasilane (
1) with γ-cyclodextrin in water has shown that the silicon main chain of
1 has an all-trans rod-like conformation in the hydrophobic cavities of γ-cyclodextrin at room temperature.
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Morifumi Fujita, Wan Hyeok Kim, Tadashi Okuyama
2003 Volume 32 Issue 4 Pages
382-383
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Reaction of 4-substituted cyclohex-1-enyliodonium salt with cyanide in chloroform produces three isomeric cyanocyclohexenes,
ipso and two
cine products. Deuterium labeling experiments showed that the allylic
cine product is formed via the Michael addition of cyanide, followed by elimination of the iodonio group and a 1,2-H shift.
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Takabumi Nagai, Kazuhisa Fujii, Katsuto Otake, Masahiko Abe
2003 Volume 32 Issue 4 Pages
384-385
Published: 2003
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We examined the ability for microemulsion formation of fluorinated surfactants containing perfluoropolyether moieties for the CO
2-philic tail group and carboxylic acid ammonium or poly(ethylene glycol) methyl ether for the hydrophilic groups and found that the hydrophilic CO
2-philic balance of surfactants plays an important role in the formation of microemulsions.
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Wei Zhang, Jianli Hua, Pin Shao, Peng Ren, Jingui Qin, Yu Zhang, Zuhon ...
2003 Volume 32 Issue 4 Pages
386-387
Published: 2003
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Two new organic chromophores containing furan ring as a conjugation bridge located near the donor have been synthesized and characterized by X-ray single crystal structure determination. Their first molecular hyperpolarizability (β) are measured by Hyper-Rayleigh Scattering (HRS) technique.
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Takahito Oyamada, Chiharu Maeda, Hiroyuki Sasabe, Chihaya Adachi
2003 Volume 32 Issue 4 Pages
388-389
Published: 2003
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We showed that tetra-2-pyridinylpyrazine (TPP) and TPP: cesium (1:1 molar ratio) composite layers had excellent electron injection and transport characteristics in organic light emitting diodes. High luminescence efficiency with low driving voltage was observed in various cathode configurations, suggesting that the TPP layer can efficiently accept electrons from metal and metal oxide cathode layers, and transport and inject electrons into an adjacent organic layer.
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Lidong Qin, Hongbo Li, Lixin Wu, Dengli Qiu, Xi Zhang, Jiacong Shen
2003 Volume 32 Issue 4 Pages
390-391
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Novel nano “island” and “ribbon” morphologies could be fabricated just by changing the air-substrate interface of cast films during evaporation. Speeding up or slowing down evaporation of cast films 100-fold allowed diblock molecules containing oligo (phenylene vinylene) dimer as the rod segment and poly (ethylene oxide) as the coil segment to form two different self-assembled nano objects on mica: “islands” and “ribbons,” respectively.
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Jun-ichi Matsuo, Hiroyuki Yamanaka, Asahi Kawana, Teruaki Mukaiyama
2003 Volume 32 Issue 4 Pages
392-393
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Styrene derivatives reacted with diphenyl(trifluoromethanesulfonyloxy)sulfonium trifluoromethanesulfonate (
1) at low temperature to afford 2-arylethenyl(diphenyl)sulfonium triflates (
2). Treatment of
2 with primary amines gave the corresponding 2-arylaziridines in high yields. One-pot synthesis of various aziridines was also successfully carried out without isolation of the intermediate
2.
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Jiu Rong Liu, Masahiro Itoh, Ken-ichi Machida
2003 Volume 32 Issue 4 Pages
394-395
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Nanocomposite materials of α-Fe/Y
2O
3 prepared by melt-spun technique exhibited good electromagnetic wave absorption properties (
RL<−20 dB) in a 2.0-3.5 GHz range as absorbers with thickness ranging from 3 to 5 mm, and a minimum reflection loss of −36 dB was obtained at 2.6 GHz with an absorber thickness of 4 mm.
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Masaharu Komatsu, Tata Narasinga Rao, Akira Fujishima
2003 Volume 32 Issue 4 Pages
396-397
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Electrochemically generated hydroxyl radicals at anodically polarized boron-doped diamond electrodes in aqueous media have been suggested to be responsible for their ability to electrochemically incinerate organic waste. In this letter, for the first time, we provide experimental evidence for the generation of hydroxyl radicals by using coumarin followed by the fluorescence detection of its hydroxylated product.
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Yoshito Tobe, Takuji Kusumoto, Shiho Minakata, Rui Umeda, Motohiro Son ...
2003 Volume 32 Issue 4 Pages
398-399
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While an attempt to prepare 10,10-diformyl[4.3.1]propella-1,4-diene was not successful owing to its facial skeletal rearrangement, the corresponding diacetyl derivative was isolated, which would serve as a useful precursor of carbene sources.
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Nobuhito Imanaka, Toshiyuki Masui, Masaharu Itaya
2003 Volume 32 Issue 4 Pages
400-401
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A new inorganic pigment based on rare earth phosphate has been synthesized with the goal of preparing ecologically and environmentally friendly specific pigments. A yellow–green pigment that consists of nontoxic elements was obtained by doping calcium ions into the cerium orthophosphate lattice. Characterizations using XRD, UV–vis spectroscopy, and colorimetric assessment revealed that the formation of a Ca-doped CePO
4 solid solution was responsible for the appearance of the color.
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Tamio Kamidate, Yoshiki Ishida, Hirofumi Tani, Akihiko Ishida
2003 Volume 32 Issue 4 Pages
402-403
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A method for direct detection of horseradish peroxidase (HRP) as a marker molecule trapped in liposomes by the use of HRP-catalyzed fluorescein chemiluminescence (CL) with hydrogen peroxide has been developed. Maximum CL emission in the direct detection of HRP in liposomes increased by a factor of 13 times compared with that in the detection of HRP dissolved in lipid-free buffer solution.
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Nobukazu Negishi, Kohei Yamada, Kazuo Takimiya, Yoshio Aso, Tetsuo Ots ...
2003 Volume 32 Issue 4 Pages
404-405
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Oligothiophene/fullerene dyads (
nT-C60) are incorporated in photovoltaic cells, which demonstrate relatively high incident photon-to-current efficiency. The monochromatic power conversion efficiency of the Al/
16T-C60/Au device measured at 456 nm is 0.4%.
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Syuhei Yamaguchi, Isao Tokairin, Yoko Wakita, Yasuhiro Funahashi, Koic ...
2003 Volume 32 Issue 4 Pages
406-407
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A novel Zn(II)–OH complex surrounded with hydrogen bonding and hydrophobic interaction groups has been prepared as a structural/functional model of carbonic anhydrases, and characterized by X-ray structure analysis and ESIMS and
1H- and
13C-NMR spectroscopies. The complex has been found to exhibit a reversible binding of CO
2.
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Ping Wang, Shuwu Yang, Junko N. Kondo, Kazunari Domen, Takashi Yamada, ...
2003 Volume 32 Issue 4 Pages
408-409
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The formation of H
2O and OH groups on an active Pt/SO
42−–ZrO
2 (Pt/SZ) catalyst was observed upon hydrogen adsorption at 523 K, whereas only OH groups were formed on an inactive Pt/SZ catalyst.
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Hiroshi Yamaguchi, Saburo Nakanishi, Nobuhiro Kihara, Toshikazu Takata
2003 Volume 32 Issue 4 Pages
410-411
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Crown ethers with a planar chiral (1,3-η
4-diene)tricarbonyliron unit were prepared. They revealed a good chiral recognition ability for α-substituted benzylammonium salts (
Krel = 1.3–2.0). Ligand substitution of the iron tricarbonyl moiety with triphenylphosphane inverted the chiral selectivity.
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Keiichiro Utsumi, Takeshi Kawase, Masaji Oda
2003 Volume 32 Issue 4 Pages
412-413
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The title cyclophanes as a potential fragment of double-helical π-conjugated system were synthesized, and the spectroscopic and crystallographic characterization shows the strained nature of the π-system; variable-temperature NMR spectra also reveal that the cyclophanes exist as an equilibrium mixture between the
meso- and
dl-forms in solution.
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