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Sang Ho Park, Sung Woo Oh, Sung Goon Kang, Seung-TaeK Myung, Yang-Kook ...
2004 Volume 33 Issue 1 Pages
2-3
Published: 2004
Released on J-STAGE: December 01, 2003
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Molybdenum-doped layered Li[Ni
0.5+xMn
0.5−2xMo
x]O
2 materials were synthesized by an ultrasonic spray pyrolysis method. Single phase of Li[Ni
0.5+xMn
0.5−2xMo
x]O
2 could be prepared in 0 ≤
x ≤ 0.05 region. Structural and electrochemical properties of the Li[Ni
0.5+xMn
0.5−2xMo
x]O
2 were characterized by means of X-ray diffraction, Rietveld refinements, and galvanostatic charge/discharge test. The discharge capacity increased linearly with the increase of molybdenum contents,
x, and exhibited a high discharge capacity over 175 mAh/g between 2.8 and 4.4 V with a good capacity retention.
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Masaharu Murata, Tomo Yamasaki, Mizuo Maeda, Yoshiki Katayama
2004 Volume 33 Issue 1 Pages
4-5
Published: 2004
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A small molecule was labeled as an antigen in DNA during PCR. In vitro transcription reaction using the DNA as a template was regulated by specific interaction between the antigen and its monoclonal antibody.
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Rong Wang, Satoshi Hoyano, Takeo Ohsaka
2004 Volume 33 Issue 1 Pages
6-7
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A solid-state amperometric O
2 gas sensor was successfully fabricated by using supported 1-
n-butyl-3-methylimidazolium hexafluorophosphate (BMIPF
6) porous polyethylene membrane as a solid-state electrolyte. The present O
2 gas sensor, which is capable of being operated at room temperature, shows a wide detection range and a high stability.
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Tomofumi Takuwa, Jim Yoshitaka Onishi, Jun-ichi Matsuo, Teruaki Mukaiy ...
2004 Volume 33 Issue 1 Pages
8-9
Published: 2004
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A facile one-pot
C-benzylation reaction proceeded smoothly and in good yields by treating various sodium enolates and benzyl alcohol with in situ generated alkoxy diphenyl sulfonium salt derived from trifluoromethansulfonic anhydride and diphenyl sulfoxide.
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Teruaki Mukaiyama, Yohei Kobashi
2004 Volume 33 Issue 1 Pages
10-11
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A simple and practical method for the glycosylation of several acceptors with 2,3,4,6-tetra-
O-benzyl-
D-glucopyranosyl bromide was established by the promotion of phosphine oxide. The corresponding disaccharides were obtained in high yields with extremely high α-selectivities under almost neutral condition.
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Nobuhiro Kawatsuki, Emi Uchida, Hiroshi Ono
2004 Volume 33 Issue 1 Pages
12-13
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This letter describes thermally enhanced reorientation of azobenzene-containing polymer films by linearly polarized (LP) 633 nm He–Ne laser light. Axis-selective photoreaction of the
Z-isomers and subsequent annealing generated parallel reorientation with a reorientational order larger than +0.8 although the film was almost off-resonant at 633 nm.
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Ken-ichi Tominaga, Yoshiyuki Sasaki
2004 Volume 33 Issue 1 Pages
14-15
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Hydroformylation of 1-hexene using carbon dioxide as carbonyl carbon source attained high yield and good chemoselectivity in heptanols when a ruthenium complex was used in biphasic ionic liquid–toluene system.
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Jun Takaya, Hiroyuki Kusama, Nobuharu Iwasawa
2004 Volume 33 Issue 1 Pages
16-17
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(Indolin-3-ylidene)pentacarbonyltungsten, a non-heteroatom-stabilized carbene complex of group 6 metal, was successfully isolated by the reaction of
N-(
o-alkynylphenyl)imine derivative, vinyl ether and tungstenhexacarbonyl under photoirradiation. This complex was moderately stable and fully characterized by spectroscopic analysis.
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Eietsu Hasegawa, Naoki Chiba, Tomoya Takahashi, Shinya Takizawa, Takas ...
2004 Volume 33 Issue 1 Pages
18-19
Published: 2004
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Both 2-(2′-hydroxyphenyl)-1,3-dimethylbenzimidazoline and 2-(4′-hydroxyphenyl)-1,3-dimethylbenzimidazoline were found to act as formal two hydrogen atom-donors for photoinduced electron transfer reactions of epoxy ketones and other carbonyl compounds.
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Chao Wang, Hong-an Xi, Ruo-Ding Wang
2004 Volume 33 Issue 1 Pages
20-21
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Mesoporous Ce-doped TiO
2 with a high thermal stability was prepared by using inexpensive glycerin as a pore former via sol-gel and hydrothermal processes. The product has a high specific surface area (129.7 m
2/g) and a pore volume (0.41 cm
3/g) even after calcination at 600 °C for 2 h.
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Pengchao Che, Yaning He, Yue Zhang, Xiaogong Wang
2004 Volume 33 Issue 1 Pages
22-23
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An AB
2 monomer
N,
N-bis[2-(4-aminobenzoyloxy)ethyl]aniline was synthesized by nucleophilic substitution reaction between
N,
N-bis(2-chloroethyl)aniline and 4-aminobenzonic acid. Based on the monomer, the azo-coupling reaction was explored for the first time to prepare a hyperbranched azo polymer. The results showed that the scheme was a feasible way to synthesize hyperbranched azo polymers under extremely mild conditions.
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Soichiro Kyushin, Masaki Takahashi, Hideyuki Matsumoto
2004 Volume 33 Issue 1 Pages
24-25
Published: 2004
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The bicyclic and tricyclic ladder compounds consisting of two oligosiloxane chains bridged by Si–Si rungs were synthesized by the condensation of 1,2-dihydroxy-1,1,2,2-tetraisopropyldisilane and 1,1,2,2-tetrachloro-1,2-diisopropyldisilane with aniline. The structures of these compounds were confirmed by X-ray crystallography.
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Kenichi Tanaka, Yutaka Mori, Koichi Narasaka
2004 Volume 33 Issue 1 Pages
26-27
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Spiro[indoline-3,2′-pyrrolidine] derivatives were prepared from β-3-indolyl ketone oximes by treatment with methanesulfonyl chloride and triethylamine via the bond formation between 3-position of the indole ring and oxime nitrogen. These diazaspirocycles were readily transformed to the corresponding spiro oxindole derivatives.
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Yasuhiro Hosogi, Kentaro Tanabe, Hideki Kato, Hisayoshi Kobayashi, Aki ...
2004 Volume 33 Issue 1 Pages
28-29
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SnNb
2O
6 (BG = 2.3 eV) containing Sn
2+ with a 5s
2 electron configuration showed the photocatalytic activity for H
2 evolution from an aqueous methanol solution under visible light irradiation (λ > 420 nm) in the presence of a Pt cocatalyst. The energy structure calculation by the plane wave based density functional method revealed that the conduction and valence bands consisted of Nb4d and Sn5s orbitals, respectively. The valence band level consisting of the Sn5s orbitals was more negative than that consisting of O2p orbitals resulting in SnNb
2O
6 being responsive to visible light.
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Nobuya Machida, Hidekazu Yamamoto, Toshihiko Shigematsu
2004 Volume 33 Issue 1 Pages
30-31
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Amorphous solid electrolytes in the system Li
2S–P
2S
3 were obtained in a narrow composition range at around 66.7 mol % Li
2S content by a high-energy ball-milling process. The 66.7Li
2S·33.3P
2S
3 (mol %) sample showed the highest ion conductivity of 1.1 × 10
−4 S·cm
−1 at room temperature among the obtained samples. Cyclic voltammetry revealed that the sample had a wide electrochemical window of about 5 V.
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Nagao Kobayashi, Takamitsu Fukuda
2004 Volume 33 Issue 1 Pages
32-33
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Vibrational circular dichroism (VCD) spectra of (
R)-(−)- and (
S)-(+)-camphor-substituted tetrapyrazinoporphyrazines, which show a mirror-image relationship with respect to the line of intensity = 0, were recorded as the first VCD spectra of synthetic porphyrins.
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Kejian Deng, Fei Huang, Duoyuan Wang, Zhenghe Peng, Yunhong Zhou
2004 Volume 33 Issue 1 Pages
34-35
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An efficient catalyst of the title complex (abbreviated as FePz(dtn)
4) is a porphyrin-like complex, which is able to activate molecular oxygen for oxidative degradation of organic compounds in an extensive pH region without light excitation. The experiments indicated that the FePz(dtn)
4/O
2 system showed an excellent oxygenation capability, in which the Rhodamine B(RhB) was degraded nearly 52% in alkaline aqueous solution in the seven hours and the
p-nitrobenzoic acid(NBA) could be also oxygenated nearly 85% detected by UV–vis, HPLC in the similar conditions. The degradation components of RhB and NBA were analyzed by GC–MS and IR. The mineralization rate of RhB and NBA were 12 and 11.1% after reaction for 24 h respectively.
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Yong Gyu Lee, Jin-Won Park, Jung-Hyun Kim, Byoung Ryul Min, Jongsoo Ju ...
2004 Volume 33 Issue 1 Pages
36-37
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A removal efficiency of vapor-phase elemental mercury by TiO
2 irradiated using various light sources was investigated. The effective surface area of TiO
2 for Hg adsorption and UV radiation was increased by packing the adsorption bed with mixture of TiO
2 and glass beads. A rotating-type reactor was specially designed to maximize the photocatalyst’s exposure to the light source. For three types of commercially available TiO
2, more than 99% of initial Hg was removed under all the light sources tested except for the blue light still achieving a Hg removal efficiency close to 85%.
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Masaaki Nakamoto, Tomohide Fukawa, Akira Sekiguchi
2004 Volume 33 Issue 1 Pages
38-39
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One-electron oxidation of a stable tris[di-
tert-butyl(methyl)silyl]silyl radical by the triphenylmethylium ion produces the corresponding silylium ion
2. However, this underwent a rapid intramolecular methyl group migration to form a more stable silylium ion
4 via a Wagner–Meerwein type rearrangement. The facile 1,3-methyl migration over the three peripheral silicon atoms in
4 was observed in NMR time scale.
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Osamu Yamane, Ken-ichi Sugiura, Hitoshi Miyasaka, Kazuya Nakamura, Tat ...
2004 Volume 33 Issue 1 Pages
40-41
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We prepared novel pyrene-fused porphyrins via the oxidative intramolecular ring closure reactions of
meso-pyrenylporphyrin. The excitation energies and the oxidation potentials of the isolated dark-colored pyrene-fused porphyrins were significantly low compared with those of the corresponding precursors.
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Akikazu Matsumoto, Toru Odani
2004 Volume 33 Issue 1 Pages
42-43
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The intercalation of alkali metals into the polymer crystals of benzylammonium muconate is achieved by immersion in the corresponding alkaline aqueous solution at room temperature, followed by an ion-exchange reaction to the silver salt and subsequent photoreduction of the polymer, leading to the fabrication of a new type of nanocomposite consisting of organic polymer crystals and Ag nanoparticles.
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Yoshikazu Makioka, Teruyuki Hayashi, Masato Tanaka
2004 Volume 33 Issue 1 Pages
44-45
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Poly[2,7-(9-oxo-9-phosphafluorenylene)-
alt-
co-(1,4-arylene)]s, readily prepared from 2,7-dibromo-9-oxo-9-phosphafluorenes and arylene bisboronates, behaved as extended π-conjugated polymers in the UV–vis absorption spectroscopy and displayed green-blue fluorescence with high quantum yields. Cyclic voltammetry revealed the polymers exhibited electrochromic behaviors and afforded a bandgap of ca. 2.8 eV, consistent with the value from the absorption edge.
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In Tae Kim, Jung Youl Lee, Sang Woo Lee
2004 Volume 33 Issue 1 Pages
46-47
Published: 2004
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Solution-processible conducting polymers
1 and
2, based on 3,4-ethylenedioxypyrrole, were synthesized. A comparison of the polymers’ optical and electrical properties showed that the introduction of a vinyl group in polymer
1 produced a decrease of bandgap. This occurrence was attributed to the enhancement of the planarity of polymer
1.
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Xun Wang, Yadong Li
2004 Volume 33 Issue 1 Pages
48-49
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In this manuscript, a rational synthetic strategy from layer structure to nanotubes has been developed in the synthesis of δ-MnO
2 single crystal nanotubes by employing layered α-NaMnO
2 as precursors through a controlled hydrothermal intercalation process.
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Ke Jian Jiang, Ya Li Sun, Ke Feng Shao, Lian Ming Yang
2004 Volume 33 Issue 1 Pages
50-51
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A novel class of amorphous state triphenylamine-based trihydrazones were synthesized by condensation reaction of tris(
p-formylphenyl)amine with
N-methyl-
N-phenyl hydrazine,
N,
N-diphenylhydrazine,
N-1-naphthyl-
N-phenyl-hydrazine, and
N-2-naphthyl-
N-phenyl-hydrazine, respectively, and characterized using different scanning calorimetry (DSC) and cyclic voltammetry (CV).
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Yoshio Furusho, Tomoya Oku, G. Abraham Rajkumar, Toshikazu Takata
2004 Volume 33 Issue 1 Pages
52-53
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A [2]rotaxane was synthesized in a high yield from a dumbbell-shaped
sec-ammonium salt having trityl thioether and 3,5-di-
t-butylphenyl groups at the both ends and dibenzo-24-crown-8-ether, through the slipping, utilizing the reversible cleavage–rebondage of the trityl thioether linkage.
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Changhui Ye, Xiaosheng Fang, Yinhai Wang, Ting Xie, Aiwu Zhao, Lide Zh ...
2004 Volume 33 Issue 1 Pages
54-55
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Single crystalline tin dioxide nanoribbons have been synthesized in bulk quantity by a mild solution approach using cetyltrimethylammonium bromide surfactant as a soft template. The as-synthesized SnO
2 nanoribbons have a length up to tens of micrometers, width of several hundred nanometers, and thickness of several tens of nanometers.
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Liang Shi, Yunle Gu, Luyang Chen, Zeheng Yang, Jianhua Ma, Yitai Qian
2004 Volume 33 Issue 1 Pages
56-57
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Nanocrystalline cubic titanium carbide (TiC) powders were successfully synthesized at 450 °C in an autoclave by using Ti, Na, and CCl
4 as the reactants. The X-ray powder diffraction pattern indicates the formation of TiC. Transmission electron microscopy images show that typical TiC crystallites are composed of nanoparticles with the average grain size of about 30 nm.
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Shinji Tamura, Kazuhiko Koyabu, Toshiyuki Masui, Nobuhito Imanaka
2004 Volume 33 Issue 1 Pages
58-59
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Lithium carbonate flux was introduced in the preparation of La
2O
2CO
3: Eu
3+ oxycarbonate phosphor particles to improve the photoluminescence intensities. The flux treatment brought increasing in the crystallinity of oxycarbonate phosphor accompanying the phase transition from the two-phase mixture of tetragonal and monoclinic forms to single hexagonal phase of rare earth oxycarbonate, resulting in the increase of the emission intensity.
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Sang-Woo Joo
2004 Volume 33 Issue 1 Pages
60-61
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A UV–vis absorption spectroscopy and surface-enhanced Raman scattering (SERS) study shows that benzyl mercaptan was found to be adsorbed faster than thiophenol on gold nanoparticle surfaces at a low bulk concentration of ≈10
−7 M, whereas they appeared to exhibit almost identical spectral behaviors at high concentration of ≈10
−5 M.
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Hitoshi Takada, Yoshimasa Watanabe, Masakazu Iwamoto
2004 Volume 33 Issue 1 Pages
62-63
Published: 2004
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Selenite ion in an aqueous solution could be effectively trapped in the zirconium sulfate–surfactant micelle mesostructure (ZS). The reaction proceeded through anion exchange between HSO
4− in ZS and HSeO
3−. The maximum sorption capacity of ZS for HSeO
3− was 2.47 mmol g
−1 at 303 K.
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A. Morsali, A. R. Mahjoub
2004 Volume 33 Issue 1 Pages
64-65
Published: 2004
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A lead(II) complex with three ligands, 4,4′-bipyridine (4,4′-bpy), nitrate, and thiocyanate, has been synthesized and characterized by CHN elemental analysis, IR-,
1H-,
13C- and
207Pb NMR spectroscopy. The single-crystal X-ray data of [Pb(4,4′-bpy)(NO
3)(SCN)]
n compound shows that the complex to be two dimensional polymeric and the Pb atom has an eight-coordinate geometry. The lone pair of electrons on lead(II) is inactive in this complex.
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Kiyoshi Fujisawa, Yoko Ishikawa, Yoshitaro Miyashita, Ken-ichi Okamoto
2004 Volume 33 Issue 1 Pages
66-67
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We prepared a series of copper(I) polynuclear complexes bridged by three different alkyl substituted pyrazolate anions. From X-ray analysis, these differences reflected their molecular structures. These structural changes also reflected some properties in their IR, far-IR, UV–vis, and NMR spectra.
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Yutaka Matsuo, Yoichiro Kuninobu, Shingo Ito, Eiichi Nakamura
2004 Volume 33 Issue 1 Pages
68-69
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Metathetical coupling of an η
5-fullerene ruthenium complex Ru(η
5-C
60Me
5)Cl(CO)
2 and sodium cyclopentadienide gives a molecular hybrid of ruthenocene and fullerene, Ru(η
5-C
60Me
5)(η
5-C
5H
5) (bucky ruthenocene), the structure of which was determined by spectroscopic and crystallographic analyses. The molecule shows unique reactivity among known ferrocene and ruthenocene compounds.
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Da-Yang Zhou, Shi-Wei Zhang, Kiyotaka Onitsuka, Shigetoshi Takahashi
2004 Volume 33 Issue 1 Pages
70-71
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Carbonylation of norbornene in the presence of a rhodium carbonyl catalyst under water–gas-shift reaction conditions gave a norbornene–carbon monoxide co-dimer having an enol–lactone structure in a high yield.
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Tetsuya Kayano, Yasuchika Yonezawa, Chung-gi Shin
2004 Volume 33 Issue 1 Pages
72-73
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A convenient synthesis of the main tridehydropentapeptide skeleton [Fragment B–C derivative] of a thiostrepton-type macrocyclic antibiotic, sulfomycin I, was first achieved.
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Yan Xu, Wei Fan, Naotaka Chino, Kazuhiro Uehara, Shirou Hikichi, Norit ...
2004 Volume 33 Issue 1 Pages
74-75
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Two novel porous germanates, [Ge
5O
10](H
2O) (
1) and [Ge
10O
20OH] [(CH
3)
4N] (
2), are synthesized by a hydrothermal method using TMA (tetramethylammonium), and characterized by X-ray crystallography, showing that a novel type of 3 membered rings (two octahedral GeO
6 and one tetrahedral GeO
4) exists in
1, and the OH
− anions are located in the center of double 4-membered rings in
2.
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Yoji Yamamoto, Makoto Komiyama
2004 Volume 33 Issue 1 Pages
76-77
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When gap-structures are formed in substrate DNA by using peptide nucleic acid (PNA), these sites are rapidly and selectively hydrolyzed by Ce(IV)/EDTA complex. Scission efficiency at the gap-site is 6-fold higher than that obtained by use of the corresponding DNA additives. Site-selectivity is also higher. The DNA/PNA duplexes must take anti-parallel direction here.
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Costa Conn, Ronald Shimmon
2004 Volume 33 Issue 1 Pages
78-79
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A route to 3,3′-disubstituted-2,2′-bipyridines from 1,10-phenanthroline-5,6-quinone is described. The methodology involves the 1,2-addition of an organometallic reagent to the quinone, followed by lead tetraacetate cleavage of the diol. This, in turn, is followed by Lúche or Wolf–Kishner reduction affording diols or alkanes respectively.
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Tadashi Yokota, Teturou Ohtake, Hajime Ishikawa, Takahiro Inakuma, Yuk ...
2004 Volume 33 Issue 1 Pages
80-81
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We investigated in vitro the reactivity of lycopene toward peroxynitrite and identified the reaction products after scavenging peroxynitrite. On the basis of these studies, we propose a mechanism for peroxynitrite scavenging action of lycopene.
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