Bulletin of the Chemical Society of Japan

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Hydrogen Bonding Effect on the Fluorescence of π-Electron System. III. Fluorescence Quenching of Some Nitrogen Heterocycles Caused by Hydrogen Bond Formation
Bulletin of the Chemical Society of Japan - Tập 30 Số 7 - Trang 711-715 - 1957
Noboru Mataga, Shizuyo Tsuno
Abstract 1. Hydrogen bonding effect on the fluorescence of acridine, 3,6-diaminoacridine and 3,6-bisdimethylaminoacridine was studied in non-polar solvent added with proton donors such as phenol, naphthols, aniline and pyrrole. 2. Their fluorescence yields are decreased when hydrogen bonded with these proton donors, in...... hiện toàn bộ
Aggregation Effects on Electrochemical and Spectroelectrochemical Properties of [2,3,9,10,16,17,23,24-Octa(3,3-dimethyl-1-butynyl)phthalocyaninato]cobalt(II) Complex
Bulletin of the Chemical Society of Japan - Tập 71 Số 5 - Trang 1039-1047 - 1998
Hiroaki Isago, Clifford C. Leznoff, Matthew F. Ryan, Robert A. Metcalfe, Rifka Davids, A. B. P. Lever
Abstract The title complex, [Co(odmbpc)], which is a single isomer and is highly soluble in common organic solvents, has been prepared and investigated electrochemically and spectroelectrochemically in dichloromethane solutions. The cyclic voltammograms of this complex at a concentration of ca. 6 × 10−5 mol dm−3 exhibited two reversible reduction wav...... hiện toàn bộ
Oxidation of Propylene over the Tin-Antimony Oxide Catalysts. I. Dependency of Acrolein Formation on the Composition of Catalyst and Calcination Conditions
Bulletin of the Chemical Society of Japan - Tập 40 Số 9 - Trang 2172-2176 - 1967
Katsuhiko Wakabayashi, Yoshio Kamiya, Nobuto Ohta
Abstract For the purpose of elucidating the catalysis of the binary system consisting of Sn and Sb oxides, recommended in the patent for the oxidation of propylene to acrolein, the oxidation of propylene has been studied; in addition, the X-ray patterns of the system have been investigated. The mixtures of this binary system after sintering were diff...... hiện toàn bộ
Oxidation of Propylene over the Tin-Antimony Oxide Catalysts. II. Investigations of Physicochemical Properties of the Catalysts
Bulletin of the Chemical Society of Japan - Tập 41 Số 11 - Trang 2776-2781 - 1968
Katsuhiko Wakabayashi, Yoshio Kamiya, Nobuto Ohta
Abstract The physicochemical properties of the binary system composed of Sn and Sb oxides have been investigated. The electrical conductivity increased rapidly up to 3 atom% Sb, and subsequently decreased, little by little, as the Sb oxide content in the binary system increased. The surface area also increased rapidly up to 3 atom% Sb, and in the reg...... hiện toàn bộ
Polarized Absorption and Reflection Spectra of the Single Crystals of Benzidine–7,7,8,8-Tetracyano-p-quinodimethane Molecular Complexes
Bulletin of the Chemical Society of Japan - Tập 52 Số 11 - Trang 3180-3191 - 1979
Kyuya Yakushi, Masaaki Iguchi, Haruo Kuroda
Abstract Polarized absorption and reflection spectra were observed on the single crystals of the solventfree and solvent containing modifications of benzidine (BD)–7,7,8,8-tetracyano-p-quinodimethane (TCNQ) molecular complex, by using the microspectrophotometers of transmission and reflection types. The absorption spectra obtained by the dispersion a...... hiện toàn bộ
A Semi-empirical MO Study of Radical-induced Decomposition of Dibenzoyl Peroxide. The Charge-transfer Character and Reaction Mechanism
Bulletin of the Chemical Society of Japan - Tập 52 Số 4 - Trang 1086-1090 - 1979
Osamu Kikuchi, Keizô Suzuki, Katsumi Tokumaru
Abstract Radical-induced decomposition reactions of diacyl peroxides were investigated on the basis of the electronic structure of the peroxide-radical systems which were calculated using an approximate restricted open-shell SCF MO method in the MINDO/3 approximation, and on the basis of configuration analysis of the transition state of the reaction....... hiện toàn bộ
The Solubility of Sulfur in Na2O–SiO2 Melts under Various Oxygen Partial Pressures at 1100 °C, 1250 °C, and 1300 °C
Bulletin of the Chemical Society of Japan - Tập 46 Số 10 - Trang 3099-3103 - 1973
Shigeru Nagashima, Takashi Katsura
Abstract The solubility of sulfur in Na2O–SiO2 melts with the Na2O/SiO2 molar ratios of 1/3, 1/2, and 1/1 was investigated by varying the oxygen partial pressure at 1100, 1250, and 1300 °C. The results at 1100 °C are complicated, for the equilibrium state within the gas phase is not established. From the experiments at 1250 and 1300 °C, the following...... hiện toàn bộ
The Determination of Film Resistance by Means of the Frequency at the Maximum Phase Angle and the Estimation of the Degradation of the Coating Film
Bulletin of the Chemical Society of Japan - Tập 63 Số 4 - Trang 1237-1239 - 1990
Isao Sekine, Kazuhiko SAKAGUCHI, Makoto Yuasa
Abstract The determination of film resistance (Rf) was investigated by means of the frequency at the maximum phase angle (fθmax), as obtained from electrochemical impedance measurements. fθmax was linearly correlated with Rf. The degradation of the coating film was obviously and rapidly evaluated from fθmax by comparison with Rf.
Orientation Effect of Side Chain Substituents in Aromatic Substitution. Induced Ortho Nitration
Bulletin of the Chemical Society of Japan - Tập 68 Số 4 - Trang 1155-1161 - 1995
Paolo Strazzolini, Giancarlo Verardo, Fausto Gorassini, Angelo G. Giumanini
Abstract The presence of a free carboxyl or ester function on the α-carbon of toluene induces the nitration of the phenyl ring in the ortho position at or above the statistical value (chaperon effect), when pure HNO3 is used in CH2Cl2 solution. This is at variance with the results of classical nitration in H2SO4, where p-nitration predominates by far...... hiện toàn bộ
Acyliminium Cyclization of Several Chiral N-Alkenylsuccinimide Derivatives
Bulletin of the Chemical Society of Japan - Tập 63 Số 1 - Trang 287-289 - 1990
Jun Ohwada, Yoshinobu Inouye, Motoko Kimura, Hiroshi Kakisawa
Abstract The acyliminium intermediate derived from (3R,4R)-N-(3-butenyl)-3,4-bis(benzyloxy)succinimide cyclized to give (8aS)- and (8aR)-hexahydro-3(2H)-indolidinone derivatives. On the other hand, those derived from N-3-hexenyl derivatives afforded (8aS)-hexahydro-3(2H)-indolidinone(s) exclusively. The geometry of the double bond reflected the stere...
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