-
Fukue Nagata, Tatsuya Miyajima, Yoshiyuki Yokogawa
2003 Volume 32 Issue 9 Pages
784-785
Published: 2003
Released on J-STAGE: August 04, 2003
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A novel surfactant-free process were proposed by modifying oil-in-water emulsion method to produce PLA/calcium phosphate composite. Several analyses suggested that the end group of PLA would play as the nucleation site for calcium phosphate precipitates at the oil/water interface. The precipitated calcium phosphate might play a role as stabilizer for microsphere fabrication.
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Shinichi Sakida, Hironobu Nakata, Yoji Kawamoto
2003 Volume 32 Issue 9 Pages
786-787
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113Cd magic-angle spinning (MAS) and static NMR spectra were measured of fourteen kinds of chlorocadmate glasses to reveal the chlorine coordination environments around Cd
2+ in the glasses in detail. The spectra of the glasses suggest that the glass structures are mainly composed of infinite double-chains of edge-shared CdCl
6 octahedra, being independent of the CdCl
2 content and the kinds of chlorides except for CdCl
2.
113Cd MAS and static NMR spectroscopies enabled us to reveal not only chlorine coordination number of Cd but also linkage manners between CdCl
6 octahedra in the glasses.
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Katsuya Mizuno, Masato Kurihara, Shigeru Takagi, Hiroshi Nishihara
2003 Volume 32 Issue 9 Pages
788-789
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Temperature-dependent reversible intramolecular electron transfer between a Ru(III)–porphyrin and a Ru(II)–porphyrin π-cation radical was observed in a novel binary π-system of a porphyrin and a ruthenium trichloro terpyridyl complex.
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Angang Dong, Yajun Wang, Yi Tang, Deju Wang, Nan Ren, Yahong Zhang, Zi ...
2003 Volume 32 Issue 9 Pages
790-791
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Uniform hollow silicalite-1 spheres with a high intact ratio and good mechanical stability were fabricated through a novel and effective approach, which involved the seed-induced hydrothermal crystallization of mesoporous silica microbeads in an alkaline aqueous solution.
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Ping Wang, Shuwu Yang, Junko N. Kondo, Kazunari Domen, Toshihide Baba
2003 Volume 32 Issue 9 Pages
792-793
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Hydroxy groups formed on AgA zeolites upon H
2 (D
2) adsorption exhibited infrared bands at different frequencies depending on the degree of Ag
+ exchange. The hydroxy groups formed by H
2 adsorption were found to occur mainly inside the β-cages of AgA-30, as evidenced by the inaccessibility of CO.
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Ryuta Fujii, Sayaka Kitagawa, Kou Takahashi, Noriyasu Okazaki, Akio Ta ...
2003 Volume 32 Issue 9 Pages
794-795
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Carbonaceous deposit (denoted as C(d)) which was formed on alumina by C
2H
4 pyrolysis at 550 °C reacted selectively and preferentially with a mixture of NO and O
2 in the presence of C
2H
4, suggesting that the C(d) acts as an effective intermediate during the selective reduction of NO with C
2H
4 too.
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Yun-Qi Tian, Chen-Xin Cai, Xue-Jun Yuan, Yi-Zhi Li, Tian-Wei Wang, Xia ...
2003 Volume 32 Issue 9 Pages
796-797
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Molecular spontaneous assembly of In(III) and bidentate ditopic ligand (pzdc) gives a novel compound with four-connected 3D framework which demonstrates a NbO-like net.
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Akira Yamaguchi, Ryo Kato, Seiichi Nishizawa, Norio Teramae
2003 Volume 32 Issue 9 Pages
798-799
Published: 2003
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A self-assembled monolayer of thiourea-based anion receptor was formed at a gold surface, and its affinity with monovalent inorganic anions (MeCO
2−, H
2PO
4−, Cl
−) in acetonitrile solution was examined by second harmonic generation spectroscopy. The estimated adsorption coefficients of anions at the monolayer reveal specific binding selectivity compared with the selectivity found in a bulk acetonitrile phase.
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Susumu Hara, Tetsuji Zama, Shingo Sewa, Wataru Takashima, Keiichi Kane ...
2003 Volume 32 Issue 9 Pages
800-801
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A polypyrrole deposited electrochemically on tungsten coil showed 11.6% strain and 0.20 N force induced electrochemically. The W coil significantly reduced iR drop of the PPy, resulting in improving performance of the actuator. The fibrelike structure was suitable for applications of artificial muscles.
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Yan Xing, Yunling Liu, Guanghua Li, Zhan Shi, Li Liu, He Meng, Wenqin ...
2003 Volume 32 Issue 9 Pages
802-803
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A three-dimensional zinc phosphate [Zn
2(HPO
4)
3][C
3N
2H
12],
I, has been solvothermally synthesized templated by racemic 1,2-diaminopropane; its structure consists of vertex-linking ZnO
4, and HPO
4 tetrahedral units forming channels bound by 8- and 12-T atoms (T = Zn, P). The enantiomers of 1,2-diaminopropane are separated as
R and
S configuration in the alternating 8-membered channels.
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Hiroyuki Nakazumi, Chista L. Colyer, Koji Kaihara, Shigeyuki Yagi, Yut ...
2003 Volume 32 Issue 9 Pages
804-805
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Asymmetric squarylium fluorophores with 618–680 nm emissions exhibit significantly enhanced fluorescence and increased quantum yield (maximum 97%) by the formation of 1:1 dye–protein complexes when bound as non-covalent labeling probes to human serum albumin (HSA).
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Masako Saito, Yayoi Yokoyama, Yasushi Yokoyama
2003 Volume 32 Issue 9 Pages
806-807
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Transparent stretched films of DNA–dimethyldioctadecylammonium ion complex incorporating a photochromic diarylethene exhibited large change in optical rotation by its photochromic reactions. As the stretched films at the photostationary state of UV-irradiation showed the dichroism, it was suggested that the diarylethene molecules are partly intercalated between the DNA base pairs.
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Satoshi Yamashita, Masayuki Nihei, Hiroki Oshio
2003 Volume 32 Issue 9 Pages
808-809
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Reactions of CuCl
2·2H
2O with tetradentate bis-Schiff base ligands yielded dinuclear copper(II) complexes of [Cu
II2(sah)
2] (
1) and [Cu
II2(sao)
2] (
2) (H
2sah = 1,7-bis(salicylideneamino)heptane and H
2sao = 1,8-bis(salicylideneamino)octane). X-ray crystallographic analyses revealed that
1 and
2 have a cofacial cyclic structure with an intramolecular cavity.
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Shou-Tian Zheng, Jie Zhang, Guo-Yu Yang
2003 Volume 32 Issue 9 Pages
810-811
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The hydrothermal reaction of VOSO
4, As
2O
3, ZnCl
2, en (ethylenediamine), HCl, and H
2O produces [{{Zn(en)
2}
2As
6V
15O
42(H
2O)}
2{Zn(en)
2}]·2Hen·3H
2O, which is the first dimeric As-V-O cluster linked by transition metal complex bridge. The structure of this compound was characterized by single crystal X-ray diffraction, elemental analysis, EPR, TGA, and IR spectrum.
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Satoshi Koizumi, Masayuki Nihei, Hiroki Oshio
2003 Volume 32 Issue 9 Pages
812-813
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Reactions of NiCl
2·6H
2O and Ni(CH
3COO)
2·4H
2O with tridentate ligand yielded di- and trinuclear nickel(II) complexes of [Ni
2(HL1)
2Cl
2(MeOH)
2] (
1) and [Ni
3(HL2)
2(CH
3COO)
4(MeOH)
2] (
2) (H
2L1 =
N-(2-hydroxybenzyl)ethanolamine), H
2L2 =
N-(2-hydroxybenzyl)propanolamine), respectively; the magnetic susceptibility measurements revealed that
1 and
2 have singlet and septet spin ground states, respectively.
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Teruaki Mukaiyama, Hiroaki Kamiyama, Hiroyuki Yamanaka
2003 Volume 32 Issue 9 Pages
814-815
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Friedel–Crafts benzylation and phenethylation reactions of several aromatic compounds with benzyl and phenethyl benzothiazol-2-yl carbonate derivatives were carried out in the presence of scandium triflate (Sc(OTf)
3) as a catalyst. Suitable combinations of the leaving group of carbonates and acid promoters that generate cationic alkyl species were examined.
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Noriko Ihara, Yoichi Tachibana, Joo Eun Chung, Motoichi Kurisawa, Hiro ...
2003 Volume 32 Issue 9 Pages
816-817
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Catechin-immobilizing polymer particles have been developed by laccase-catalyzed oxidation of catechin in the presence of amine-containing porous polymer particles. The resulting particles showed good scavenging activity toward stable free DPPH radical and ABTS radical cation.
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Degang Fu, Yu Zhang
2003 Volume 32 Issue 9 Pages
818-819
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Composite nanocrystal materials CdS/PW
12O
403− with an ordered structure formed by CdS clusters surrounded with dispersed PW
12O
403− anions were synthesized. The material has of a long period about 6.6 nm in agreement with the size sum of individual CdS cluster and PW
12O
403− anion.
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Akiko Kotachi, Takashi Miura, Hiroaki Imai
2003 Volume 32 Issue 9 Pages
820-821
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We successfully obtained silicate-mediated CaCO
3 films on a chitosan surface in an aqueous solution system. The presence of silicate anions induced the miniaturization of the carbonate crystals and two-dimensional growth with the arrangement of the miniaturized subunits on the functional surface. The mortar-like effects of silicate anions on the morphological evolution were quite similar to those of organic polyelectrolytes having carboxy groups, such as poly(acrylic acid).
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Mitsutaka Okumura, Yasutaka Kitagawa, Kizashi Yamagcuhi, Tomoki Akita, ...
2003 Volume 32 Issue 9 Pages
822-823
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Highly dispersed Au catalysts were active for the direct formation of H
2O
2 form H
2 and O
2. Especially, the rate of H
2O
2 production greatly increased when Au nanoparticles were deposited onto SiO
2, MCM-41 and active carbon supports.
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Xiaoying Liu, Bozhi Tian, Chengzhong Yu, Bo Tu, Zheng Liu, Osamu Teras ...
2003 Volume 32 Issue 9 Pages
824-825
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Well-patterned crystalline nanowire arrays of binary compound metal sulfides, CdS, ZnS, and In
2S
3, were synthesized for the first time employing a simple impregnation reaction procedure from two separate precursors (metal and sulfur precursors) using mesoporous SBA-15 as a hard template.
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Liming Shen, Luchun Guo, Ningzhong Bao, Kazumichi Yanagisawa
2003 Volume 32 Issue 9 Pages
826-827
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By adopting a room-temperature grinding of the zinc acetate–oxalic acid powder mixture and a subsequent thermal decomposition reaction, agglomerated ZnO nanocrystals with diameters of 15–40 nm were prepared. By adding NaCl in the whole process, well-dispersed ZnO nanocrystals with diameters of 3–4 nm, showing an obvious blue shift due to the size quantization effect, were prepared.
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Keiichi Ohno, Shingo Matsumoto, Misako Aida, Hiroatsu Matsuura
2003 Volume 32 Issue 9 Pages
828-829
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2-(
N,
N-Dimethylamino)ethanethiol exists in aqueous solution as a cation, zwitterion, or anion in different pH regions. Me
2NH
+EtSH and Me
2NH
+EtS
− assume the
gauche conformation around the NC–CS bond, as stabilized by strong intramolecular 1,4-N–H
+···S and 1,4-N–H
+···S
− hydrogen bondings, respectively, while Me
2NEtS
− assumes the
trans conformation around the same bond.
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Jun-ichi Yamaguchi, Shinya Nagai, Emi Fukuoka, Takayuki Suyama
2003 Volume 32 Issue 9 Pages
830-831
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Treatment of
N-(4-nitrophenoxycarbonyl)amino acid with an equimolar amount of amine in the absence of a coupling agent gave the corresponding α-amino acid amide in high yield.
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Koichi Kawamura
2003 Volume 32 Issue 9 Pages
832-833
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The photochemistry of a merocyanine dye (
1)/triazine (
2) two-component system that could be used as a visible light radical generator in photopolymerization formulations has been investigated. The electron transfer from excited merocyanine to triazine to generate a reactive photoinitiating radical was proposed based on fluorescence quenching experiments and a product analysis study.
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Kazumasa Okamoto, Akinori Saeki, Takahiro Kozawa, Yoichi Yoshida, Seii ...
2003 Volume 32 Issue 9 Pages
834-835
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Subpico- and picosecond pulse radiolyses were carried out to investigate geminate ion recombination in neat benzene. The fast decay of dimer radical cation corresponding to geminate ion recombination with an electron was directly observed for the first time. The characteristic lifetime and average initial distance between a thermalized electron and its parent cation were estimated to be 1.2 ps and 3.2 nm.
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Md. A. B. H. Susan, Migyung Yoo, Hirofumi Nakamoto, Masayoshi Watanabe
2003 Volume 32 Issue 9 Pages
836-837
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A super-strong acid, bis(trifluoromethanesulfonyl)amide, was combined with 4,4′-trimethylenedipyridine at various molar ratios to prepare a novel series of Brønsted acid–base ionic liquids. The protic neutral salt was electroactive for H
2 oxidation and O
2 reduction at a platinum electrode under non-humidifying condition, which shows the potential of pyridinal systems as new fuel cell electrolytes for elevated temperature operation and foretells the polymeric model of solid-state anhydrous proton conductors.
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Xianghua Kong, Yadong Li
2003 Volume 32 Issue 9 Pages
838-839
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Well-aligned ZnO whiskers were prepared by a catalyst-assisted flux method using ZnS powders as starting materials at a temperature of 860 °C. Au coating on the Si substrate plays a key role on the nucleation. The growth of ZnO whiskers was controlled by a high temperature SLS mechanism.
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Keiichiro Ogawa, Masatoshi Miura, Toshio Nakayama, Jun Harada
2003 Volume 32 Issue 9 Pages
840-841
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When solutions of 2-hydroxyphenazine (
1), 3-hydroxyacridine (
2), and 7-hydroxyquinoline (
3) were irradiated with UV light at 77 K, they became deeply colored. The color of the solutions reverted to the original one, when they were left in the dark at 77 K or at a higher temperature. We ascribe the photochromism to proton tautomerization, which is most likely induced by an intermolecular proton transfer in the excited state.
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Xu-Feng Lin, Sun-Liang Cui, Yan-Guang Wang
2003 Volume 32 Issue 9 Pages
842-843
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The first solid phase synthesis of 1,2,4-oxadiazolines via 1,3-dipolar cycloaddition of nitrile oxide generated in situ on solid support with a variety of imines is described. The synthetic sequences were performed in parallel one-pot fashion. Cleavage from the support under two different mild conditions afforded a library of 1,2,4-oxadiazolines in good yields and purity.
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Yoshihiro Yokokawa, Kouji Kobayashi, Mineyuki Yokoyama, Shosuke Yamamu ...
2003 Volume 32 Issue 9 Pages
844-845
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Racemic 9-hydroxy-10-oxo-12(
Z),15(
Z)-octadecadienoic acid [(±)-KODA] was synthesized via a coupling reaction between a diyne and an epoxide derived from methyl oleate as a key step. An optically active 9
R-KODA was also synthesized by enantioselective lipase-catalyzed esterification of an allyl alcohol. Both synthetic (±)-KODA and 9
R-KODA showed remarkable flower-inducing activity in
Pharbitis nil.
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Yasuaki Einaga, Masahiro Kotake, Yasuhiro Yamada, Osamu Sato
2003 Volume 32 Issue 9 Pages
846-847
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A polymer matrix isolation technique was examined as a potentially novel strategy for realizing optically switchable materials. Not only was a ferricinium ion ([Cp
2Fe
III]
+) produced, but also was produced an isomer of ferrocene (Cp
2Fe) with high spin Fe
II in a poly(methyl methacrylate) (PMMA) matrix film containing CCl
4 by the photoillumination of ferrocene at low temperature. The high spin state could be maintained for an extended period when the sample was kept below ≈130 K. This is the first observation of a photoinduced spin transition for ferrocene. The strategy that we used to achieve the spin transition using optical stimuli may open up many possibilities for the development of new magneto-optical devices.
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Kyoko Yagi, Masahiro Irie
2003 Volume 32 Issue 9 Pages
848-849
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A diarylethene dimer connected with a diyne
1 (O–O) was synthesized. Upon irradiation with 350-nm light the colorless hexane solution of
1 (O–O) changed to a dark-blue solution, in which absorption maximum was observed at 574 nm. The color is due to the formation of the isomer having one closed-ring form
1 (O–C).
1 (O–C) emitted red fluorescence at 720 nm and the intensity reversibly changed along with the photochromic reaction.
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Bezhan Chankvetadze, Chiyo Yamamoto, Yoshio Okamoto
2003 Volume 32 Issue 9 Pages
850-851
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The combination of the high chiral recognition ability of cellulose tris(3,5-dimethylphenylcarbamate) (CDMPC) with the favorable dynamic properties of a silica-based monolithic chromatographic support allowed the baseline enantioseparation of 2,2,2-trifluoro-1-(9-anthryl)ethanol with the retention times of 7.2 and 18.5 s for the first and second eluted enantiomers, respectively. The separation was accomplished in 30 s which may be the shortest time in which baseline HPLC enantioseparations have been reported.
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Morio Nagata, Yoshimi Yoshimura, Junichi Inagaki, Yoshiharu Suemori, K ...
2003 Volume 32 Issue 9 Pages
852-853
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Light-harvesting (LH) 1-type complexes consisting of LH polypeptides and zinc bacteriochlorophyll
a (Zn–BChl
a) were stably assembled in DMPC lipid bilayers on an electrode at room temperature. Photoinduced electronic currents of which action spectra revealed two peaks corresponding to the Qy absorption bands of Zn–BChl
a complex due to the presence of LH1-type complex were observed.
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Tomohiko Sato, Wasuke Mori, Chika Nozaki Kato, Tetsushi Ohmura, Tsubas ...
2003 Volume 32 Issue 9 Pages
854-855
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A novel microporous rhodium(II) coordination polymer, [Rh
2(H
2TCPP)] (
1) (H
2TCPP = 4,4′,4″,4″′-(21
H,23
H-porphine-5,10,15,20-tetrayl)tetrakis benzoic acid) was synthesized. The complex
1 showed high porosity of the micropores of 7.3 Å. The amount of nitrogen adsorbed by
1 was 2.87 mole per mole of Rh, which is about three times that of rhodium(II) fumarate and rhodium(II) terephthalate. Complex
1 also showed high turnover frequencies for the hydrogenation of ethylene and propene at ca. 200 K.
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Jun Lu, Qing-dao Zeng, Chen Wang, Li-jun Wan, Chun-li Bai
2003 Volume 32 Issue 9 Pages
856-857
Published: 2003
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The self-assembled monolayer and bilayer of tetrakis (octadecylthio)tetrathiafulvalene (TODT-TTF) on highly orientated pyrolytic graphite (HOPG) surface were studied by scanning tunneling microscope (STM). Direct observation of the dimer of TODT-TTF formed by π-π interaction was achieved.
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Kentaro Morimitsu, Seiya Kobatake, Shinichiro Nakamura, Masahiro Irie
2003 Volume 32 Issue 9 Pages
858-859
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Highly efficient photocycloreversion reaction was observed for diarylethene derivatives with cyano groups at the reactive carbons of the thiophene rings. The cycloreversion quantum yield of 1,2-bis(2-cyano-5-phenyl-3-thienyl)perfluorocyclopentene was found to be ca. 30 times larger than that of 1,2-bis(2-methyl-5-phenyl-3-thienyl)perfluorocyclopentene.
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Baomin Lin, Xiaoxing Wang, Qian Guo, Wei Yang, Qinghong Zhang, Ye Wang
2003 Volume 32 Issue 9 Pages
860-861
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Vanadium oxide supported on SBA-15 exhibits superior catalytic performances for the partial oxidation of methane to formaldehyde. A space-time yield of formaldehyde as high as 93 mol kg
cat.−1h
−1 has been obtained with a formaldehyde selectivity of 94% over 3 wt % VO
x/SBA-15 catalyst, significantly higher than those reported so far.
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Yu He, Ye Tian, Yongfa Zhu
2003 Volume 32 Issue 9 Pages
862-863
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A two-step method was developed for the large-scale synthesis of luminescent Y
2O
3:Eu nanobelts. The structure and composition of the as-prepared Y
2O
3:Eu were characterized by XRD, TEM, and EDX. The luminescent performance of the nanobelts was also characterized and the result was different from that of the other Y
2O
3:Eu materials observed before.
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Hideyuki Gono, Seizo Tamagaki
2003 Volume 32 Issue 9 Pages
864-865
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The anion complexation ability of 1,2-bis[(4-phenylpyridinio)methyl]benzene dichloride in MeCN was examined by UV-titration. The compound produced selectively the sufficiently strong H
2PO
4− complex in a 1:2 molar ratio. The presence of both of the 4-phenyl moieties was required for the H
2PO
4−-selection. The X-ray crystallography of the complex structure is presented.
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Kiyoharu Nakagawa, Kimito Okumura, Takahiro Shimamura, Na-oki Ikenaga, ...
2003 Volume 32 Issue 9 Pages
866-867
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Carbon dioxide is an effective oxidant for the conversion of alkanes to chemical feedstocks. Oxidized diamond is useful as a novel catalytic support material. Oxidized diamond provided catalytic sites for the activation of alkanes under CO
2 atmosphere. The present findings also suggest that the surface-properties of oxidized diamond may facilitate unique catalytic reactions, such as alkanes conversion in the presence of CO
2.
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Mie Fujii, Shoko Goto, Yasuo Nakao, Motoo Shiro, Tomohiko Sato, Wasuke ...
2003 Volume 32 Issue 9 Pages
868-869
Published: 2003
Released on J-STAGE: September 05, 2003
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The dinuclear nickel(II) complexes [Ni
2(L-Et)(μ-1,3-N
3)(N
3)(H
2O)]·[Ni
2(L-Et)(μ-1,3-N
3)(N
3)(CH
3OH)](NO
3)
2·H
2O, (
1) and [Ni
2(L-Et)(μ-1,3-N
3)(N
3)(H
2O)]NO
3·H
2O, (
1′) (HL-Et =
N,
N,
N′,
N′-tetrakis[(1-ethyl-2-benzimidazolyl)methyl]-2-hydroxy-1,3-diaminopropane) bridged by one alkoxo of L-Et
− and one azido were prepared and the crystal structure of
1 was determined by X-ray crystallography. Magnetic susceptibility measurements for
1′ from liquid helium temperature to room temperature showed an antiferromagnetically strong interaction (2
J = −187 cm
−1,
H = −2
JS1·
S2).
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Hirosato Monobe, Kenji Kiyohara, Naohiro Terawasa, Manabu Heya, Kunia ...
2003 Volume 32 Issue 9 Pages
870-871
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Infrared photoinduced alignment change of liquid crystal domains was investigated and a uniform and anisotropic change of domains was observed. The texture observation and polarized microscopic IR spectra show that a change of the molecular alignment occurred and the direction of columns depends on the polarizing angle of an irradiating infrared light.
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Masao Kaneko, Takayuki Hoshi
2003 Volume 32 Issue 9 Pages
872-873
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A solid state dye-sensitized solar cell was successfully fabricated using inexpensive polysaccharide solid involving redox electrolyte and organic medium with the incident photon-to-electricity conversion efficiency over 7%.
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Takeshi Hashimoto, Shuhei Hara, Yumi Shiraishi, Karuppannan Natarajan, ...
2003 Volume 32 Issue 9 Pages
874-875
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Synthesis and characterization of a new ruthenium complex, [Ru(acac)
2(mhmk)] (
1) with coordinated β-ketiminate ligand are described. The complex has been obtained by the reaction of acetone on coordinated acetonirile in [Ru(acac)
2(CH
3CN)
2], the first such reaction to be observed. X-ray structure of
1 is similar to that of [Ru(acac)
3]. Cyclic voltammetric studies of
1 show a negative shift for both reduction and oxidation indicating that there is large electron density on ruthenium containing β-ketiminate ligand when compared to ruthenium containing only β-diketonato ligands, [Ru(acac)
3].
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Hiroshi Okada, Masaaki Okazaki, Hiromi Tobita, Hiroshi Ogino
2003 Volume 32 Issue 9 Pages
876-877
Published: 2003
Released on J-STAGE: August 25, 2003
JOURNAL
RESTRICTED ACCESS
The tellurosilyliron complex Cp
*(CO)
2FeSiMe
2TePh (
1) was synthesized by treatment of Cp
*(CO)
2FeSiMe
2Cl with LiTePh. Irradiation of complex
1 and acetone in toluene led to dissociation of a CO ligand and insertion of acetone into the silicon–tellurium bond to afford the five-membered metallacycle Cp
*(CO)Fe{κ
2(
Si,
Te)-Me
2SiOCMe
2TePh}.
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