-
Cheol Su Yu, Hyukjae Choi, Sunghyun Kim
2002 Volume 31 Issue 7 Pages
648-649
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The iron phthalocyanine (FePc) monolayer adsorbed on a graphite surface showed a remarkable activity for the SO
2 reduction in aqueous conditions. The highest activity was observed at strongly acidic solutions and decreased with a pH increase due to the H
+ limitation of reduction. Only SO
2 and HSO
3- are reducible forms. The reduction mechanisms at strongly and moderately acidic conditions were suggested. The SO
2 reduction current was independent of the surface coverage and the ppb level detection was possible with amperometry.
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Hee K. Chae, Jung Young Kim, Chulsoon Hwang, Bo Wha Lee
2002 Volume 31 Issue 7 Pages
650-651
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An octanuclear oxomolybdenum(V) cluster compound [Mo
8O
16Cl
2(OCH
3)
6(HOCH
3)
4] was prepared from the reaction of oxomolybdenum(V) chloride and the potassium salt of triethanolamine in methanol. The complex was used to prepare Sr
2FeMoO
6, which shows a very high negative magnetoresistance of 33% with a magnetic field of 0.8 T at 12 K.
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Bunji Uno, Yoshiaki Kato
2002 Volume 31 Issue 7 Pages
652-653
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A sensitive detection method based upon continuous regeneration of the oxidized form of the ferrocenoyl phenols by reaction with ferrocyanide is proposed for HPLC analyses of endocrine disruptive alkylphenolic compounds. The detection limits were 5.4×10
-11 and 9.4×10
-11 mol dm
-3 of 4-
tert-butylphenol (
1) and 4-nonylphenol (
7), respectively.
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Takanori Kotera, Masahiro Mikuriya
2002 Volume 31 Issue 7 Pages
654-655
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Thiolato-bridged hexanuclear mixed-valence complex, [Cu
I3Cu
II3(apampt)
3Cl
6] (Hapampt=1-[(3-aminopropyl)amino]-2-methylpropane-2-thiol), has been synthesized and characterized by X-ray crystallography. Spectroscopic data as well as structural features support a localized mixed-valence state. Magnetic susceptibility data show that a strong antiferromagnetic interaction is operating between the Cu
II ions.
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Tomofumi Sakuragi, Seichi Sato, Tamotsu Kozaki
2002 Volume 31 Issue 7 Pages
656-657
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The effects of ionic strength on the sorption of Eu(III) on kaolinite in the presence of humic acid (HA) were examined using a batch method. Eu(III) sorption increased with increased ionic strengths in the pH range of 6 to 10, but was insensitive to ionic strength in the pH range below 5. Adsorption of HA onto kaolinite also increased in the pH range of 6 to 10, indicating that the increase in adsorption of Eu(III)-humate complexes is a predominant process for the increase in Eu(III) sorption.
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Kazuya Nakata, Hitoshi Miyasaka, Kunihisa Sugimoto, Tomohiko Ishii, Ke ...
2002 Volume 31 Issue 7 Pages
658-659
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Treatment of a mixed-valence Mn
6 cluster, [Mn
6O
2(
t-BuCO
2)
10(
t-BuCO
2H)
4] (
1), with 4,4′-bipyridine (bpy) in dichloromethane/1,2-dichloroethane solution gave a one-dimensional polymeric chain compound, [Mn
6O
2(
t-BuCO
2)
10(
t-BuCO
2H)
2(bpy)] (
2), in which the parent cluster core was maintained as a building block.
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Shigeru Kohtani, Shigeki Makino, Akihiko Kudo, Kunihiro Tokumura, Yasu ...
2002 Volume 31 Issue 7 Pages
660-661
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A toxic endocrine disruptor, 4-n-nonylphenol, was degraded using a well-known TiO
2 and a visible-light-driven BiVO
4 photocatalyst under irradiation from a solar simulator. The degradation rates for both BiVO
4 and TiO
2 are comparable in air-saturated solution though surface area of BiVO
4 is much smaller than that of TiO
2. This fact indicates that BiVO
4 has a great ability to degrade alkylphenols in wastewater under solar light.
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Akira Watanabe, Masashi Unno, Fusao Hojo, Takao Miwa
2002 Volume 31 Issue 7 Pages
662-663
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A new method to prepare microcrystalline Ge film by laser-induced pyrolysis of spin-coated organogermanium nanocluster film was developed, which is applicable to the spatially selective formation of microcrystalline Ge micropatterns.
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J. V. Rau, V. Rossi Albertini, N. S. Chilingarov, S. Colonna, M. di Mi ...
2002 Volume 31 Issue 7 Pages
664-665
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In situ diffraction studies of structural transformations occurring during thermal decomposition of a cobalt fluoride-CoF
3-were performed using a very-high-energy (89 keV) synchrotron radiation. The real-time evolution of the crystal lattice was followed as a function of temperature. A new compound appearing as intermediate in the course of the decomposition from CoF
3 to CoF
2 was discovered.
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-
Kouichi Nakagawa
2002 Volume 31 Issue 7 Pages
666-667
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Spin-lattice relaxation times of the spin probe moiety in the HCO membrane were obtained for the first time. The
Tle becomes shorter with the probe site going toward the inner chain as well as with a rise in temperature. The spin dynamics were consistent with EPR lineshape observed.
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Koji Kanehashi, Koji Saito
2002 Volume 31 Issue 7 Pages
668-669
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The
17O multiple quantum magic angle spinning (MQMAS) and the mutual (
31P↔
17O) CP/MAS (MCP) NMR was applied to clarify the detailed chemical structure in amorphous AlPO
4. An application of the mutual CP/MAS method being capable of mapping out the connectivity with the
17O MQMAS for characterization of oxygen sites provided precious structural information in amorphous AlPO
4.
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Shigemi Kohiki, Hirokazu Shimooka, Syozo Takada, Akihiko Shimizu, Tomo ...
2002 Volume 31 Issue 7 Pages
670-671
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Preparation and magnetic properties of mesostructured VOSO
4 based materials, which were synthesized using liquid-crystal templating technique, have been investigated. Low temperature magnetic properties of the samples exhibited Langevin paramagnetism with an effective magnetic moment μ
eff=1.4 μ
B and a paramagnetic Curie point θ=0 K without any magnetic transition, which were considerably different from magnetic properties of α- or β-VOSO
4 crystals.
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María A. Aramendía, Victoriano Borau, César Jim&e ...
2002 Volume 31 Issue 7 Pages
672-673
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The product compositions in the methanol conversion to hydrocarbons over several zeolites are compared and discussed. Although a great number of different compounds are present, small alkanes, such as isobutane and isopentane, and polymethylbenzenes are the major compounds over zeolites beta, mordenite and faujasite. However, zeolite ferrierite is quite selective for alkenes. Also, zeolite beta can transform acetone into hydrocarbons.
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Wen-Hu Wang, Yun-Hua Wang, Jun-Xia Lu, Jian-Hua Wang, Yi Xie, Zhong-Xi ...
2002 Volume 31 Issue 7 Pages
674-675
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We have engineered novel hemoproteins with high catalytic activity by introducing several hydrophilic residues in the axial ligand of microsomal cytochrome
b5, an electron transfer protein. Some (H39S and H39Q) of these mutants possess quite high peroxidase-like reactivity as designed. One (H39C) of them shows very low catalytic reactivity, and this may be attributed to the unique hexa-coordination (His-Fe
3+-Cys) for this mutant.
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Masayuki Shirai, Kuriko Aoki, Kazuo Torii, Masahiko Arai
2002 Volume 31 Issue 7 Pages
676-677
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Mesoporous materials with a smectite-type structure containing cobalt divalent cations in octahedral sheets (MST(Co)) are synthesized by the calcination of the mixture of dimethydistearyl ammonium chloride and silicate fragments synthesized with a hydrothermal method, their pore properties of the MST(Co) samples being able to control with hydrothermal conditions.
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Seung-Woo Lee, Izumi Ichinose, Toyoki Kunitake
2002 Volume 31 Issue 7 Pages
678-679
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Ultrathin films of titanium oxide gel that are imprinted with carbobenzyloxy-L (and D)-amino acids (Cbz-Ala, Cbz-Leu, and Cbz-Phe) were prepared on gold-coated QCM electrodes. The imprinted films showed much better binding for template stereoisomers than the corresponding enantiomers. The chiral separation factor increased with increasing sizes of the amino acid side chain.
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Zong-huai Liu, Xiaojing Yang, Yoji Makita, Kenta Ooi
2002 Volume 31 Issue 7 Pages
680-681
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A new layered nanocomposite with propylamine-containing silica between the manganese oxide sheets was synthesized for the first time through a delamination/reassembling process. It had a higher ordered stacked structure than the silica-pillared manganese oxide obtained by the conventional intercalation reaction.
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Takayoshi Kuroda-Sowa, Satoshi Fukuda, Shinsuke Miyoshi, Masahiko Maek ...
2002 Volume 31 Issue 7 Pages
682-683
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Diphenylphosphate anions can replace with benzoate anions of [Mn
12O
12(O
2CPh)
16(H
2O)
4] to afford a novel Mn
12 single-molecule magnet (SMM) with mixed bridging ligands.
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Yoshimitsu Sakaguchi, Takatoshi Yamada, Yasuyuki Okazaki, Satoshi Imah ...
2002 Volume 31 Issue 7 Pages
684-685
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Photochemical reaction in a flexographic printing plate was characterized. The distribution of photochemical reaction in the direction of thickness was successfully understood by the combination of overall reactivity obtained by
13C NMR measurement and reactivity near the surface obtained by ATR FTIR spectroscopy.
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Eun Ju Shin
2002 Volume 31 Issue 7 Pages
686-687
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A fluoroionophore, 1-(anthryl)-2-(benzo-15-crown-5)ethene, was synthesized. This crown ether derivative showed remarkably high cation-induced fluorescence enhancement for magnesium ion.
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-
J. S. Yadav, M. Syamala
2002 Volume 31 Issue 7 Pages
688-689
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Piperazinomethyl polystyrene serves as an efficient and reusable catalyst in acetic acid (piperazinomethyl polystyrene acetate) for the three component condensation reaction of Meldrum’s acid, aldehyde and a thiol which affords the corresponding spirocyclic derivatives in good yields and purity.
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Teruo Takahashi, Katsunori Tsunoda, Hirofumi Yajima, Tadahiro Ishii
2002 Volume 31 Issue 7 Pages
690-691
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The isolation of single-wall carbon nanotube (SWNT) bundles and purification of these SWNTs were investigated by dispersing the SWNTs in an aqueous gelatin solution. TEM images of the SWNTs dispersed in the gelatin solution showed that the interaction between the gelatin molecules and the SWNTs produces a transformation of the SWNT bundles into thin bundles. Raman spectra measurements revealed that dispersing the SWNTs in the gelatin solution is a good purification procedure for the SWNTs.
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Kimihisa Yamamoto, Masayoshi Higuchi, Hirohiko Kanazawa
2002 Volume 31 Issue 7 Pages
692-693
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Novel linear and hyper-branched aromatic polyamides having phenylazomethine units were synthesized by the polycondensation of di- or triamine monomers containing azomethine bonds with dicarboxylic acids. The polymers obtained have a high solubility in DMF unlike polyphenylazomethines, a high thermal stability (Td
10%>500 °C), and is susceptible to a simple and selective acid catalyzed decomposition for chemical recycling.
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Yong Yang, Jianlin Shi, Hangrong Chen, Shugang Dai, Ye Liu
2002 Volume 31 Issue 7 Pages
694-695
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Au-CdS core-shell nanoparticles (CSNs) are synthesized by a simple method based on directly self-assembling process and successfully integrated into BaTiO
3 films. The significant enhancement of third-order nonlinear optical nonlinearities of Au-CdS CSNs were reported for the first time.
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Hitoshi Kasai, Hiroyuki Tanaka, Shuji Okada, Hidetoshi Oikawa, Tomoji ...
2002 Volume 31 Issue 7 Pages
696-697
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Single molecular chains of π-conjugated polymers such as polythiophene and polydiacetylene were clearly observed by STM, and their molecular structures and/or conformation were discussed in relation to bonding characteristics. It should be noted that even molecular weight could be determined using well-resolved STM images.
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Teruaki Mukaiyama, Shouhei Imachi, Keiko Yamane, Masahiro Mizuta
2002 Volume 31 Issue 7 Pages
698-699
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Boron enolates were in situ generated smoothly by treating α-iodo ketones with 9-BBN-H, and aldols were produced in highly diastereoselective manner by successive reaction with various aldehydes at low temperature.
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Shigenori Matsushima, Hiroyuki Nakamura, Masao Arai, Chao-Nan Xu
2002 Volume 31 Issue 7 Pages
700-701
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The electronic structure of strontium aluminate, SrAl
2O
4, is calculated by using the scalar-relativistic full potential linearized augmented plane wave (FLAPW) method. SrAl
2O
4 is predicted to be an indirect-gap material, since the valence band maximum locates near Z point and the conduction band minimum at Γ point. The valence band with the width ca. 5.3 eV is mainly constructed from O 2p orbitals, where Al 3s3p and Sr 5s5p slightly hybridize with O 2p, and the lower conduction band from Sr 5s orbitals.
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E. K. Girija, Y. Yokogawa, F. Nagata
2002 Volume 31 Issue 7 Pages
702-703
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Formation of collagen-apatite composite by biomimetic methods without any previous treatment of the collagen fibrils has been investigated. Reconstituted collagen fibrils obtained from Type I collagen solution were incubated in conventional and revised simulated body fluid (C and R-SBF) solutions to form calcium phosphate. Spherical deposits of B-type carbonate apatite started precipitating along the fibrils from day 1 of incubation in both C and R-SBF. But the large number of carbonate ions in R-SBF has changed the microstructure of the apatite precipitates. The calcium rich apatite deposits are more in R-SBF than in C-SBF. Percentage of Cl
- ions in the precipitates of R-SBF were less than in C-SBF.
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Masahiro Suzuki, Mariko Yumoto, Mutsumi Kimura, Hirofusa Shirai, Kenji ...
2002 Volume 31 Issue 7 Pages
704-706
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L-Lysine derivatives act as low-molecular-weight hydrogelators that can gel water below 1 wt%.
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Peng Wu, Guojun Deng, Qinghua Fan, Qingdao Zeng, Chen Wang, Lijun Wan, ...
2002 Volume 31 Issue 7 Pages
706-707
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Ordered assembly of dendritic BINAP ligand has been studied by using scanning tunneling microscopy (STM). It is proposed that the molecules are arranged in a dimeric manner in the assembly.
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Shigekazu Ito, Shigeo Kimura, Masaaki Yoshifuji
2002 Volume 31 Issue 7 Pages
708-709
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Copper-mediated coupling reaction of 1-methyl-2-(2,4,6-tri-
t-butylphenyl)-2-phosphaethenyllithiums afforded 1,4-diphosphabuta-1,3-diene or 1,6-diphosphahexa-1,5-diene derivatives, depending upon non-coordinated or coordinated to W(CO)
5, which facilitates an isomerization to a 3-phospha-2-propenyllithium.
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Amit Basak, Subhendu Sekhar Bag, Kakali Rani Rudra, Jharna Barman, Sum ...
2002 Volume 31 Issue 7 Pages
710-711
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Enantiopure 4-substituted L-proline derivatives have been prepared via intramolecular radical cyclization of
N-aryl sulphonyl-
N-allyl-3-bromo-L-alanines in high yields. Surprisingly, the extent of selectivity was found to be primarily dependent on the nature of sulphonamido aryl group and could be as high as 33:1 using naphthyl sulphonamide.
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Baoqing Shentu, Kenichi Oyaizu, Hiroyuki Nishide
2002 Volume 31 Issue 7 Pages
712-713
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The picket-fence cobaltporphyrin (CoP) having rapid and reversible oxygen-binding properties was employed to accumulate oxygen from a bulk solution to a diffusion layer at an electrode surface. Modification of a carbon electrode with a thin CoP liquid membrane resulted in a significant increase in the reduction current of oxygen, which proved to be a new type of modified electrode to reduce the diffusion resistance of oxygen from the bulk solution onto the electrode surface.
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Satoshi Yamabi, Hiroaki Imai, Koichi Awazu
2002 Volume 31 Issue 7 Pages
714-715
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Periodic array of titanium dioxide (TiO
2) microprojections was fabricated in aqueous solutions using poly(methylmethacrylate) (PMMA) films with ordered microcavities as a mold. The periodic microprojections consisting of crystalline TiO
2 exquisitely transcribed the architecture of the mold without deformation or shrinkage. This biomimetic route including preferable nucleation on the specific organic surface and subsequent growth of the crystalline phase at a low temperature is applicable to construct three-dimensional periodic architectures for photonic structures of various metal oxides.
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Hironobu Machinaga, Kanako Matsufuji, Masaaki Ohba, Masahito Kodera, H ...
2002 Volume 31 Issue 7 Pages
716-717
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A Fe
IIIZn
III complex, [FeZn(L)(AcO)
3]BPh
4·H
2O, of 2-{
N-[2-(dimethylamino)ethyl]iminomethyl}-6-[
N,
N-di(2-pyridyl-methyl)aminomethyl]-4-methylphenolate (L
-) hydrolyses tri(
p-nitrophenyl) phosphate (TNP) into di(
p-nitrophenyl) phosphate (DNP
-) and DNP
- into mono(
p-nitrophenyl) phosphate (MNP
2-) in aqueous DMF.
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S. Raja Ram, A. Rama Devi, D. S. Iyengar
2002 Volume 31 Issue 7 Pages
718-719
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Oxidative decarboxylation of azlactones by cerium(IV) ammonium nitrate yields 2-arylglyoxylamide in very good yields.
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Lidong Qin, Lixin Wu, Hongbo Li, Xueliang Hou, Dengli Qiu, Jiacong She ...
2002 Volume 31 Issue 7 Pages
720-721
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Coverage controlled monolayer nano-sheets with homogeneous height were fabricated by casting aqueous solution of amphiphilic rod-coil diblock molecule
1 on mica surface. The monolayer sheet was anisotropic, due to the asymmetric arrangement of the diblock molecule on surface, confirmed by polarization-dependent fluorescence spectra.
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Yukiko Takahashi, David A. Pacheco Tanaka, Hideyuki Matsunaga, Toshish ...
2002 Volume 31 Issue 7 Pages
722-723
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Ligand exchange reaction between catecholamines and sulfosalicylic acid (SSA) in the ternary complex, [Tb(SSA)EDTA]
4- leads to switch the luminescence signal, providing a simple detection system of catecholamines available in an aqueous solution.
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Yunle Gu, Huagui Zheng, Fan Guo, Yitai Qian, Ziping Yang
2002 Volume 31 Issue 7 Pages
724-725
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Ultrafine boron phosphide (BP) with cubic cell was synthesized via a benzene-thermal reaction of boron powder and phosphorus trichloride (PCl
3) with metallic lithium or sodium at 350 °C in an autoclave; initiating a new route and developing a facile technique for preparing BP.
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Miguel Yus, Francisco Foubelo, José V. Ferrández
2002 Volume 31 Issue 7 Pages
726-727
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The DTBB-catalyzed lithiation of 4-hetero-substituted dibenzothiins (phenoxathiin, phenothiazine, and thianthrene) gives the corresponding functionalized organolithium intermediates, which by reaction with different electrophiles afford the expected functionalized thiols. The cyclization of some alcohol compound derivatives gives the corresponding homologous seven-membered dibenzo heterocycles.
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Tetsuo Hino, Masahiro Hamada, Kazushi Kinbara, Kazuhiko Saigo
2002 Volume 31 Issue 7 Pages
728-729
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A
trans-4-[60]fullerenobisacetic acid derivative was easily obtained from its diethyl ester, which was regio- and stereoselectively prepared by the biscyclopropanation of [60]fullerene with a tethered bis(α-bromophenylacetate) derivative. The polycondensation of the resultant fullerenobisacetic acid with aromatic diamines proceeded smoothly to give the corresponding regio- and stereo-regular [60]fullerene pearl-necklace polyamides in excellent yields.
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Teruaki Mukaiyama, Kazuhiro Ikegai, Takashi Hashihayata, Koichi Kiyota ...
2002 Volume 31 Issue 7 Pages
730-731
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Convergent and convenient total synthesis of branched hepta-β-glucoside
1 having phytoalexin-elicitor activity was efficiently accomplished by way of two one-pot sequential glycosylation reactions. Trisaccharide
8 was synthesized in high yield by TfOH-catalyzed one-pot glycosylation using three component monosaccharides and subsequent selective deprotection of a 6′-
O-TBDPS group. The second one-pot glycosylation of trisaccharide
8 with the three monosaccharides smoothly proceeded to afford heptaglucoside
11 stereoselectively in 48% total yield based on monosaccharide
3. The targeted compound
1 was obtained in high yield after the removal of the protecting groups.
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Feng Gao, Qingyi Lu, Dongyuan Zhao
2002 Volume 31 Issue 7 Pages
732-733
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A simple ligand-assisted solvothermal process has been proposed to synthesize CdS nanowires with aspect ratio (average length/average diameter) up to 100. The simultaneous employment of two types of templates, coordinating solvent ethylenediamine (En) and ligand 8-hydroxyquinoline, has been found to be the key factor for the synthesis of one dimensional nanomaterials with high aspect ratio. By adjusting the concentration of the ligand, the produced one-dimensional nanomaterials can be elongated from 300 nm to 3.0 micrometers with unchanged diameter.
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Wanzhi Chen, Liu Fenghui, Xiaozeng You
2002 Volume 31 Issue 7 Pages
734-735
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The coordination polymer [Pt(CN)
2·2Me
3SnCN·2Me
3SnOH·bpe]
n was prepared and structurally characterized by X-ray diffraction analysis which consists of one-dimensional double-sinusoidal chains.
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Go Hitoki, Akio Ishikawa, Tsuyoshi Takata, Junko N. Kondo, Michikazu H ...
2002 Volume 31 Issue 7 Pages
736-737
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A transition metal nitride, Ta
3N
5, is a novel photocatalyst responding to visible light. Ta
3N
5 evolves H
2 and O
2 by visible light (λ<600 nm) irradiation in the presence of sacrificial electron donor and acceptor, respectively without any noticeable photo-anodic or cathodic corrosion, representing a candidate for overall water splitting by visible light.
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Kenji Shinohara, Kazuhito Hashimoto, Ryoichi Aogaki
2002 Volume 31 Issue 7 Pages
738-739
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Change in the corrosion rate of iron under a high magnetic field was examined by determining corrosion potential shifts and polarization curve measurements. With increasing magnetic flux density, the electrode potential shifted to the anodic side. This was induced by a cathodic diffusion current increment via a microscopic stirring effect in the local magnetohydrodynamic flow, which arose from interaction between the electrochemical corrosion current and the applied magnetic field.
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Sei-ichi Ishii, Makoto Mitani, Junji Saito, Sadahiko Matsuura, Shin-ic ...
2002 Volume 31 Issue 7 Pages
740-741
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Zirconium complexes bearing phenoxy/cyclopropyl-, cyclobutyl- or cyclopentyl-imine chelate ligands, when activated with methylalumoxane (MAO), produced vinyl-terminated low molecular weight polyethylenes (
Mw<5000) with higher activities than Cp
2ZrCl
2 at 25 °C. The complex having a cyclobutyl group provided the lowest molecular weight polyethylene (
Mw 2100).
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Junqi Sun, Izumi Ichinose, Rie Takaki, Aiko Nakao, Toyoki Kunitake
2002 Volume 31 Issue 7 Pages
742-743
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Ultrathin films of (TiO
2/Eu
3+)
n and (TiO
2/PAA/Eu
3+)
n composites were prepared by the surface sol-gel process and the subsequent chemisorption/coordination of Eu
3+ ions. Amorphous TiO
2-gel layers were found to act as sensitizer for efficient emission of Eu
3+.
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Hayao Imamura, Takumi Kuhara, Masataka Furutachi, Takahiko Sakamoto, Y ...
2002 Volume 31 Issue 7 Pages
744-745
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Europium and ytterbium catalysts obtained by impregnation of active carbon with lanthanide metal (Eu and Yb) solutions in liquid ammonia were found to be active for the dimerization of ethene. Ethene was selectively dimerized at 423–473 K to yield butene isomers with selectivity of 10–62%. The active catalysts were characterized as lanthanide nitride formed by the thermal decomposition of its amide.
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Hiroyuki Chiba, Setsuo Funasaka, Koichi Kiyota, Teruaki Mukaiyama
2002 Volume 31 Issue 7 Pages
746-747
Published: 2002
Released on J-STAGE: July 05, 2002
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Catalytic and chemoselective glycosylation between novel “armed” and “disarmed” glycosyl
p-trifluoromethylbenzylthio-
p-trifluoromethylphenyl formimidates was effectively performed in the presence of a catalytic amount of TfOH and MS 4A in CH
2Cl
2 at -78 °C. In addition, it was noted that highly 1,2-
cis or 1,2-
trans stereoselective synthesis was established when the above glycosylation was carried out at -78 °C in
tBuOMe or EtCN, respectively.
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