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Kei Goto, Yoko Hino, Yusuke Takahashi, Takayuki Kawashima, Gaku Yamamo ...
2001 Volume 30 Issue 12 Pages
1204-1205
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A stable aromatic
S-nitrosothiol was synthesized by taking advantage of a novel dendrimer-type steric protection group, and its structure was determined by X-ray crystallographic analysis. Its reactions including oxidation to a stable
S-nitrothiol are described.
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Maiko Itoh, Keiko Takenaka, Renji Okazaki, Nobuhiro Takeda, Norihiro T ...
2001 Volume 30 Issue 12 Pages
1206-1207
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The first stable aromatic
S-nitrosothiol,
S-nitroso-4-
t-butyl-2,6-bis[(2,2″, 6,6″-tetramethyl-
m-terphenyl-2′-yl)methyl]benzenethiol, was synthesized by the nitrosation of the corresponding thiol and the structure was established by X-ray crystallography. Its oxidation and reactions with some nucleophiles were carried out.
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Shu Seki, Shou Tsuji, Yoshinori Matsui, Seiichi Tagawa
2001 Volume 30 Issue 12 Pages
1208-1209
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The dynamics of silylene extrusion reaction was observed in polysilylene with Si branchings by using KrF excimer laser flash photolysis technique. The initial yield of silyl radicals was seen to be dependent on the backbone structure of polysilylenes, whereas the yield of silylenes was almost proportional to the number of the linear Si units in their backbones.
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Motoki Yamane, Takuma Amemiya, Koichi Narasaka
2001 Volume 30 Issue 12 Pages
1210-1211
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Rhodium(I)-catalyzed intramolecular acylation of alkynyl group proceeds by the use of acylsilanes having an alkynyl moiety. 5- and 6-Alkynoylsilanes are converted to
α-alkylidenecycloalkanones by treatment with [RhCl(CO)
2]
2 in the presence of acetic acid via transmetallation between the acylsilane moiety and a rhodium(I) complex.
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Akira Meguro, Haruaki Sakurai, Kei Kato, Soichiro Kyushin, Hideyuki Ma ...
2001 Volume 30 Issue 12 Pages
1212-1213
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In the reactions of decaisopropylbicyclo[2.2.0]hexasilane (
1) with hydrobromic acid and hydrochloric acid, the bridgehead Si–Si bond of
1 was selectively cleaved to give 1-halo-1,2,2,3,3,4,5,5,6,6-decaisopropylcyclohexasilanes. The X-ray crystallographic analysis of the products indicates that the cis-addition of the acids to the Si–Si bond is preferable.
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Hiroyuki Isobe, Naoki Tomita, Shigeki Jinno, Hiroto Okayama, Eiichi Na ...
2001 Volume 30 Issue 12 Pages
1214-1215
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A new fullerene transfection reagent bearing multiple-functional groups has been synthesized by diastereoselective double cycloaddition reaction. The highly oxygenated reagent transfers extra-cellular DNA into mammalian cells with the efficiency comparable to that of a nor-analogue.
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Atsushi Kawachi, Takashi Minamimoto, Kohei Tamao
2001 Volume 30 Issue 12 Pages
1216-1217
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The boron–metal exchange reaction of (arylsilyl)boranes with alkyllithiums, potassium
tert-butoxide, and methylmagnesium bromide affords the corresponding silyllithium, silylpotassium, and silylmagnesium compounds, respectively. Especially, the boron–lithium exchange reaction occurs even in hydrocarbon solvents such as toluene and hexane as well as in THF.
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Michiya Fujiki, Masao Motonaga, Hong-Zhi Tang, Keiichi Torimitsu, Zhon ...
2001 Volume 30 Issue 12 Pages
1218-1219
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A new rod-like polysilylene bearing a
β-branched alkyl group, poly[(
S)-3,7-dimethyloctyl(2-ethylbutyl)silylene], was found to undergo a thermo-driven, helix–helix transition at −7 °C in isooctane associated with the discontinuous changes in the singlet σ–σ* excitation energy in the silicon backbone in the switching temperature region.
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Masahiro Kako, Mei Gu, Yohei Takenaka, Kentaro Takagi, Kazuhiro Kondo, ...
2001 Volume 30 Issue 12 Pages
1220-1221
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Photolysis of aromatic ketones (2,2,2-trifluoroacetophenone, acetophenone, and benzophenone) in the presence of cyclic oligosilanes afforded two types of cycloadducts depending on the nature of the ketone employed. The quenching of the excited triplet state of benzophenone by oligosilanes was investigated by laser flash photolysis.
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Shigeyoshi Sakaki, Tatsunori Takayama, Manabu Sugimoto
2001 Volume 30 Issue 12 Pages
1222-1223
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DFT calculations clearly show that a zirconocene–ethylene complex, Cp
2Zr(C
2H
4), easily reacts with hydrosilane, SiH
4, to afford either Cp
2Zr(H)(C
2H
4SiH
3) or Cp
2Zr(SiH
3)(C
2H
5). In the transition state, the Si–H anti-bonding σ*-orbital of SiH
4 overlaps well with the π-back donating molecular orbital between Zr d
π and C
2H
4 π* orbitals.
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Hajime Maeda, Yohtaro Inoue, Hideki Ishida, Kazuhiko Mizuno
2001 Volume 30 Issue 12 Pages
1224-1225
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UV absorption maxima of trimethylsilyl-, trimethylgermyl-, and trimethylstannyl-substituted pyrenes shifted to longer wavelength than that of unsubstituted pyrene. Absorption maxima of mono-, bis-, tris-, and tetrakis(trimethylsilyl)pyrenes shifted to longer wavelength consecutively at intervals of 10 nm. Fluorescence intensities and lifetimes decreased in the order of Me
3SiAr > Me
3GeAr > Me
3SnAr. Fluorescence intensity of 1,3,6,8-tetrakis(trimethylsilyl)pyrene was the largest among those of a series of pyrenes.
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Seijiro Matsubara, Takanori Ikeda, Koichiro Oshima, Kiitiro Utimoto
2001 Volume 30 Issue 12 Pages
1226-1227
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The preparation of organolanthanoid species from diorganomagnesium and lanthanoid salt is discussed. Treatment of cerium trichloride or ytterbium trichloride with diorganomagnesium gave the corresponding organolanthanoid species much more efficiently than treatment of the salt with organomagnesium halide.
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Atsutaka Kunai, Takahiko Ochi, Arihiro Iwata, Joji Ohshita
2001 Volume 30 Issue 12 Pages
1228-1229
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Reactions of hydrosilanes, R
4−nSiH
n (R = alkyl or phenyl, n = 1–3), with 2 equiv of CuBr
2 in the presence of a catalytic amount of CuI led to selective replacement of an H–Si bond with a Br–Si bond giving R
3SiBr, R
2SiHBr, or RSiH
2Br, while treatment of R
2SiH
2 and RSiH
3 with 4 equiv of the reagent produced R
2SiBr
2 and RSiHBr
2, respectively. Similar reaction of Het
2SiSiEt
2H afforded Het
2SiSiEt
2Br.
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Tomikazu Kawano, Jun Kuwana, Tatsuji Shinomaru, Chong-Xu Du, Ikuo Ueda
2001 Volume 30 Issue 12 Pages
1230-1231
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Novel
π-conjugated nitrogen ligands, 1,2-bis(2-pyridylethynyl)benzenes, and their Cu(I) complexes have been synthesized and structurally characterized: the reactivity of the complexes for radical cyclization has also been examined.
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Takashi Karatsu, Yuuki Tanaka, Masanori Imakawa, Keijiro Fukui, Akihid ...
2001 Volume 30 Issue 12 Pages
1232-1233
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The fluorescence spectra of three rotational isomers of
E-1,2-bis(2-anthryl)ethene (
1) were obtained by the principal component analysis-self modeling (PCA-SM) method in solution. Based on the resolved spectra, the orientation of the rotational isomers in nematic and cholesteric liquid crystals (LC) were investigated.
1 mainly exists as the (s-trans, s-trans) conformer in these LC phases.
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Ali Reza Mahjoub, Ali Morsali
2001 Volume 30 Issue 12 Pages
1234-1235
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The reaction of mixture Pb(ClO
4)
2 and Pb(NO
3)
2 with 4,4′-bithiazole ligand yielded white crystals of [Pb
2(C
6H
4N
2S
2)
4(NO
3)(H
2O)](ClO
4)
3. In this complex the cationic part is in fact binuclear and contains two PbL
2 groups linked via bridging NO
3− anion. It also contains a water molecule and as well as 4,4′-bithiazole ligands in all cases are coordinated via nitrogen atoms. Three perchlorate anions are uncoordinated to lead(II) and the lone pair of valence electrons of the lead(II) ions appears to be stereochemically active. The coordinated water molecule is involved in hydrogen bonding acting as hydrogen-bond donors with two O atoms of perchlorate ions as potential hydrogen-bond acceptors.
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Ryoko M. Uda, Masatoshi Oue, Keiichi Kimura
2001 Volume 30 Issue 12 Pages
1236-1237
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A Crystal Violet derivative incorporating a tris(monoaza-15-crown-5) structure exhibits an anomalous absorbance change in the absorption spectrum of its acetonitrile solution, which was induced only by cesium ion but not by other alkali metal ions. A consideration about its complex conformation explains the cesium ion specificity and a molecular orbital calculation suggests the correlation between the conformation and absorbance.
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Akira Ohashi, Hitoshi Watarai
2001 Volume 30 Issue 12 Pages
1238-1239
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A new method of resonance Raman microprobe spectroscopy combined with a centrifugal liquid membrane (CLM) method was constructed and successfully applied to the detection of the complex of palladium(II) with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) formed at the heptane/water interface. The depth profiles of resonance Raman intensities of Pd(II)–5-Br-PADAP complex along the axis perpendicular to the interface confirmed that the complex existed only at the liquid–liquid interface.
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Toru Arai, Makiko Inudo, Tomomi Ishimatsu, Tomikazu Sasaki, Tamaki Kat ...
2001 Volume 30 Issue 12 Pages
1240-1241
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Amphiphilic peptide, Ac-Cys(Por)-Lys-Val-(-Ser-Val-)
n-Lys-Val-NH
2 (
n = 0 or 1, Cys(Por) = side-chain porphyrin-linked Cys), self-assembled to form the
β-sheet in buffer solution-2,2,2-trifluoroethanol and showed exciton coupled Cotton effects in the porphyrin region due to the closely oriented porphyrins.
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Ryuki Kakino, Hirohisa Narahashi, Isao Shimizu, Akio Yamamoto
2001 Volume 30 Issue 12 Pages
1242-1243
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Cross-coupling reaction of carboxylic acids with organoboron compounds catalyzed by palladium complexes in the presence of an activator such as dimethyl dicarbonate under mild conditions gives ketones in excellent yields except for certain substrates.
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Koji Takagi, Yukimi Nishikawa, Hideo Kunisada, Yasuo Yuki
2001 Volume 30 Issue 12 Pages
1244-1245
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The synthesis of a tropone-containing PPV-based conjugated oligomer by the Wittig polycondensation was investigated, where the tropone unit was introduced as the conjugated segment. Although the NMR and IR studies revealed the low molecular weight of the resulting product, no side reaction toward the carbonyl group in the tropone ring occurred to maintain the tropone structure as evidenced by the MALDI(Matrix-Assisted Laser Desorption Ionization)-TOFMS spectrum. The UV–vis and PL spectra gave preliminary information on the optical property of the tropone-containing conjugated oligomer.
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Takanobu Chiga, Toshiyuki Masui, Nobuhito Imanaka, Gin-ya Adachi
2001 Volume 30 Issue 12 Pages
1246-1247
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Fine Sr
2CeO
4 particles of a blue emission phosphor have been synthesized using a chemical co-precipitation technique, and the textual and optical properties were compared with the one synthesized by the conventional solid-state reaction method. Mean particle size of the prepared Sr
2CeO
4 fine particles was smaller than that given by the sample prepared from the solid-state reaction method. However, photoluminescence intensity was maintained in spite that it usually decreases with the particle size reduction.
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Shiro Hatakeyama, Subramanian Sivanesan, Taichiro Urabe
2001 Volume 30 Issue 12 Pages
1248-1249
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We carried out reactions of methyl-substituted cyclohexenes and
α-pinene with ozone in air and elucidated the mechanisms of formation of the minor products (peroxides and formic acid). Peroxyacetic acid was formed only from the cyclohexenes with a methyl group on the double bond, whereas formic acid was produced in higher yields from the cyclohexenes without a methyl group on the double bond. These differences in product yields allowed us to elucidate the mechanism of formation of the products.
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Kazuma Gotoh, Shin’ichi Ishimaru, Ryuichi Ikeda
2001 Volume 30 Issue 12 Pages
1250-1251
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Dynamics of water molecules in one-dimensional micropores AlPO
4-5 and SAPO-5 frameworks was studied by measuring
1H NMR spectra, second moment
M2 of line-width and spin-lattice relaxation time
T1. Although the presence of two kinds of water molecules free and bound on the capillary wall were reported in AlPO
4-5, our NMR
T1 results imply the absence of two kinds of H
2O motions, but the motional rate distributes from slow to fast jumps in both AlPO
4-5 and SAPO-5.
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Hirotaka Ihara, Yoshihiro Goto, Toshihiko Sakurai, Makoto Takafuji, Ta ...
2001 Volume 30 Issue 12 Pages
1252-1253
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We report temperature-triggered enhancement of molecular-shape selectivity by poly(octadecyl acrylate) which undergoes isotropic-to-crystalline phase transition. In this communication, it is also proposed that π–π interaction is included in this selective interaction and is enhanced through orientation of the carbonyl groups which are in a crystalline state.
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Yukinari Sunatsuki, Masafumi Sakata, Susumu Matsuzaki, Naohide Matsumo ...
2001 Volume 30 Issue 12 Pages
1254-1255
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A novel spin crossover Fe(III) complex, [Fe(H
3L)](ClO
4)
3·(4-fim)·H
2O (H
3L = tris[2-(((imidazol-4-yl)methylene)amino)ethyl]amine, 4-fim = 4-formylimidazole), was synthesized and the crystal structure was determined at 293 K. Cryomagnetic measurements revealed a two-step spin conversion and a pressure induced spin crossover was observed.
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Kazuhiro Manseki, Yuko Shimizu, Akiko Obata, Hiroshi Sakiyama, Kei Uno ...
2001 Volume 30 Issue 12 Pages
1256-1257
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The interaction between [Cu(salen)] and La(III) in DMF was studied by cyclic voltammetry and EQCM (Electrochemical Quartz Crystal Microbalance) technique. The quasi-reversible redox wave of [Cu(salen)] around −1.1 V vs Ag/AgCl was replaced by a reduction wave around −0.9 V on forming a [Cu(salen)···La] complex. The CuLa complex disproportionated on the electrode to exhibit an anodic stripping of Cu(0) to Cu(II) around +0.2 V.
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Kei Goto, Tomoko Okumura, Takayuki Kawashima
2001 Volume 30 Issue 12 Pages
1258-1259
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A novel nano-scale triarylsilanol bearing a bowl-shaped framework was synthesized, the structure of which was established by X-ray crystallographic analysis. The silanol was found to be extremely resistant to self-condensation whereas it reacted easily with appropriate molecules to give the corresponding derivatives.
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Takao Miyoshi, Yoshihiro Makide
2001 Volume 30 Issue 12 Pages
1260-1261
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Emissions of 21 VOCs in the Tokyo area were estimated from the increments of the averaged concentrations on weekdays above the background concentrations. Their relative data were converted to actual emissions per capita based on statistical information of several compounds. The correlation with CFC substitutes was indicated to be most useful.
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Keisuke Hirano, Yoji Oderaotoshi, Satoshi Minakata, Mitsuo Komatsu
2001 Volume 30 Issue 12 Pages
1262-1263
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Novel fluorophores, 1-aryl-3,4-diphenylpyrido[1,2-
a]benzimidazoles were synthesized. They emit intense blue to green fluorescence in solution (Φ: ca. 0.7) and show weak negative solvatofluorochromism by about 10 nm which was caused by the combination of π–π* and n–π* transitions. In the powdered form, they emit intense fluorescence whose intensity is at least two times stronger than that of Alq
3.
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Takahiro Kaneda, Takashi Yamada, Tatsuhiko Fujimoto, Yoshiteru Sakata
2001 Volume 30 Issue 12 Pages
1264-1265
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The first [5]supercyclodextrin
1s whose nano-sized cyclopentameric array is held only by a mechanical bond was synthesized by the pentakis-azo coupling of a new hermaphrodite monomer
2 with 2-naphthol as a stopper, isolated by chromatography, and characterized by MS, 2D NMR, and vis spectral methods with the help of computer simulation.
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Masato Ikeda, Atsushi Sugasaki, Yohei Kubo, Kazunori Sugiyasu, Masayuk ...
2001 Volume 30 Issue 12 Pages
1266-1267
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A novel synthetic scheme for constructing cyclic porphyrin oligomers is presented: bisporphyrin derivative
1 reacts with La(acac)
3 in 1,2,4-trichlorobenzene to yield porphyrin polygons, such as cyclic dimer
12·2La(III) and cyclic trimer
13·3La(III).
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Hirosato Monobe, Hiroaki Azehara, Yo Shimizu, Masamichi Fujihira
2001 Volume 30 Issue 12 Pages
1268-1269
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Alignment behavior of a discotic liquid crystalline triphenylene (C8OBT) on substrates coated with self-assembled monolayers (SAMs) of alkanethiol and asymmetrical disulfide was investigated by polarized microscopy. Discotic nematic (N
D) and rectangular columnar (Col
r) phases of C8OBT shows a different alignment behavior depending on the element of SAMs. C8OBT exhibits a fan-shaped texture on an alkanethiol SAM in Col
r phase, while it shows a planar alignment on a SAM of asymmetrical disulfide.
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Tsutomu Ohzuku, Kingo Ariyoshi, Satoshi Yamamoto, Yoshinari Makimura
2001 Volume 30 Issue 12 Pages
1270-1271
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Li[Ni
1/2Mn
3/2]O
4 having a spinel-framework structure was prepared by a two-step solid state reaction, i.e., crystallization at 1000 °C followed by an oxidation at 700 °C in air, and examined in nonaqueous lithium cells. Thus prepared Li[Ni
1/2Mn
3/2]O
4 showed low polarization and stability against electrolyte oxidation with rechargeable capacity of about 110–130 mAh/g at 4.7 V with 10–30 mAh/g at 4.0 V vs Li. Capacity in region of ca. 4.0 V vs Li, which was usually observed for the samples prepared by the conventional method, can be minimized by the oxidation process at 700 °C. A 3-volt lithium-ion battery with two insertion materials based on lithiated transition metal oxides having spinel-framework structures is demonstrated therefrom.
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Takeru Ito, Masato Hashimoto, Sayaka Uchida, Noritaka Mizuno
2001 Volume 30 Issue 12 Pages
1272-1273
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The single crystals of ammonium dodecatungstophosphate were successfully synthesized and the structure was analyzed. The intrinsic crystal structure (cubic,
Pn3-
m) had no cavity. It follows that the microporosity observed for the powdery sample originated from narrow spaces surrounded by the fine nanocrystallites.
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Supitcha Thongchant, Yasuchika Hasegawa, Yuji Wada, Shozo Yanagida
2001 Volume 30 Issue 12 Pages
1274-1275
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EuO nanocrystals were prepared by liquid phase reaction of europium metal in liquid ammonia for the first time. TEM revealed that the EuO nanocrystals had a spindle shape with mean length of 280 nm (
a) by mean width of 95 nm (
b). The SQUID measurement showed that the EuO nanocrystals turned into ferromagnetic phase at 70 K and 150 K.
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Yuka Shiomi, Antonis Karantonis, Seiichiro Nakabayashi
2001 Volume 30 Issue 12 Pages
1276-1277
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Spatio-temporal propagation of a reaction front along a ring electrode was observed during self-sustained iron dissolution current oscillations. The propagation was strongly related to the periodicity of the system, which depended on the cell geometry.
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Kenji Nomiya, Takeshi Hasegawa, Ryusuke Noguchi, Kei-ichi Nomura, Mizu ...
2001 Volume 30 Issue 12 Pages
1278-1279
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Triniobium(V)-substituted
β-Keggin polyoxotungstate, K
7[A,
β-SiW
9Nb
3O
40]·6H
2O, as a soluble metal-oxide analogue and a metal-oxide support of the polyoxoanion-supported organometallic complexes, was synthesized, and the crystal and molecular structures of this polyoxoanion containing the Keggin A,
β-SiW
9 unit were successfully determined for the first time.
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Kazuhiko Tanaka, Yasushi Murakami, Tomohito Imai, Taki Matsumoto, Shin ...
2001 Volume 30 Issue 12 Pages
1280-1281
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A microporous structure (
dpore < 1 nm) of titanium oxide was synthesized by a salt catalytic sol–gel process of dilute titanium tetra-
n-butoxide (Ti(
n-C
4H
9O)
4) and H
2O solution without any template molecule. The specific surface area of titanium oxide after the calcinations at 300–350 °C was 310 m
2 g
−1. It decreased significantly by calcinations above 400 °C because the microporous structure collapsed with crystallization into anatase.
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Naoto Koizumi, Akihiro Miyazawa, Takuro Furukawa, Muneyoshi Yamada
2001 Volume 30 Issue 12 Pages
1282-1283
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Both bulk and SiO
2-supported Pd sulfides were found to show methanol synthesis activity from CO + H
2 (syngas). SiO
2-supported Pd sulfide yielded 120 g kg-cat
−1 h
−1 of methanol at 613 K, 5.1 Mpa and 20 m
3 (STP) kg-cat
−1 h
−1. In the presence of H
2S 120 ppm in concentration, it preserved 40% of the activity that was obtained under the sulfur-free conditions.
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Susumu Kanaya, Nobuyuki Komine, Masafumi Hirano, Sanshiro Komiya
2001 Volume 30 Issue 12 Pages
1284-1285
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Reactions of Ru(1,5-cod)(1,3,5-cot) (
1)/Pme
3 [cod = cyclooctadiene, cot = cyclooctatriene] with propenoic acids (CH
2=CH(R)COOH) give unsaturated ruthenalactones Ru[OC(O)C(R)=CH-
κ2O,C](Pme
3)
4 [R = Me (
2a), Et (
2b), Pr (
2c),
iPr (
2d)]. In contrast, reactions of
trans-2-methyl-2-butenoic acid and 2-methylcinnamic acid (R′CH=C(Me)COOH) give Ru[OC(O)C(CH
2R′)=CH-
κ2O,C](Pme
3)
4 [R′ = Me (
2b), Ph (
2e)] as major products, suggesting the preferential activation of the sp
3 C–H over sp
2 C–H bond on ruthenium(II) center.
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Hisanao Usami, Yoshiaki Shimizu, Hitoshi Fujimatsu, Takashi Iijima
2001 Volume 30 Issue 12 Pages
1286-1287
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Quinolinium and
N-methylquinolinium intercalated in smectite clays were irradiated with ultraviolet light longer than 300 nm under air atmosphere. 5-Hydroxyquinolinium was primarily obtained in both systems.
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Chang Oh, Hee Sang Yoo, Seung Hyun Jung
2001 Volume 30 Issue 12 Pages
1288-1289
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A palladium compound in the presence of an equivalent of formic acid catalyzed reductive dimerizations of various allenes to the corresponding dienes.
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Chang Ho Oh, Jung Duk Kim, Je Wook Han
2001 Volume 30 Issue 12 Pages
1290-1291
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Palladium-catalyzed cyclizations of several 1,6-dienes were accomplished by utilizing a catalytic amount of additives. Use of Lewis acids gave the endocyclic compounds, while use of silver(I) salts gave the exocyclic compounds.
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Akira Hasegawa
2001 Volume 30 Issue 12 Pages
1292-1293
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Alumina modified silica fibers were prepared by covering with alumina fibrils. The modification induced the thermal stability under a stream of water at 1273 K without α-alumina formation. The morphology of alumina fibrils anchored on silica surface play an important role for the thermal stability in the presence of steam.
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Chunrui Wang, Kaibin Tang, Qing Yang, Yitai Qian, Cunyi Xu
2001 Volume 30 Issue 12 Pages
1294-1295
Published: 2001
Released on J-STAGE: April 04, 2003
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Nanocrystalline SnS
2 was synthesized by a hydrothermal reaction between SnCl
4·5H
2O and thiourea (NH
2CSNH
2) at 140–200 °C. XRD pattern indicated that the as-prepared sample was β-phase SnS
2. The as-prepared SnS
2 mainly consisted of hexagon slices with average diameter of 30–200 nm. A Raman spectrum of the as-synthesized β-SnS
2 was presented.
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Ajay K. Sah, Chebrolu P. Rao, Pauli K. Saarenketo, Kari Rissanen
2001 Volume 30 Issue 12 Pages
1296-1297
Published: 2001
Released on J-STAGE: April 04, 2003
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In order to understand the binding nature of the glycosylamines possessing imine functionality, a novel tetranuclear Ni(II) complex of
N-(2-hydroxybenzylidene)-4,6-
O-ethylidene-
β-
D-glucopyranosylamine having twisted Ni
4O
4 cubane core was synthesized and structurally characterized.
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Takayo Moriuchi-Kawakami, Hiroshi Aoto, Keiichi Fujimori, Yasuhiko Shi ...
2001 Volume 30 Issue 12 Pages
1298-1299
Published: 2001
Released on J-STAGE: April 04, 2003
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Novel polymer liquid membrane electrodes, in which the organotin compounds were fixed, were obtained by the reaction of PVC (poly(vinyl chloride)) with di-
n-butyltin halide hydrides (
nBu
2SnYH, Y = F, Cl, I, Ome). The improved liquid membrane electrodes displayed good potential stability and non-Hofmeister selectivity patterns. Furthermore, the highest degree of selectivity for the SCN
− ion was achieved.
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Hideki Kawai, Kazuhiro Nakano, Toshihiko Nagamura
2001 Volume 30 Issue 12 Pages
1300-1301
Published: 2001
Released on J-STAGE: April 04, 2003
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White light optical waveguide (WOWG) method was applied to transient absorption spectroscopy of ultrathin polymer films. Tetraphenylporphinetetrasulfonic acid (TPPS) in poly(vinyl alcohol) films on the surface of OWG glass was excited with the second harmonics of a nanosecond Nd:YAG laser. The transient absorption spectrum of excited triplet TPPS was detected highly sensitively for a film with the absorbance at 532 nm of only 0.0005.
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Shoji Kurata, Masatoshi Nagai
2001 Volume 30 Issue 12 Pages
1302-1303
Published: 2001
Released on J-STAGE: April 04, 2003
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Europium complexes with six types of tris
β-diketones in the absence and presence of 1,10-phenanthroline were accurately analyzed qualitatively and quantitatively using both infusion electrospray ionization mass spectrometry (ESI-MS) and fluorescence spectrometry (FL), which is usually used as the analytical method. Detection limits for compounds extracted with acetonitrile were 1–100ppb corresponding to those by FL.
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