Kazunaka Endo,*,
and
Delano Pun Chong*,
Go to the Full Text PDF
Copyright (C) 2000 by The Chemical Society of Japan
=============================
Accounts
=============================
GO TO the graphical abstract
=============================
Articles
General and Physical
=============================
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
Kazunaka Endo,*,
and
Delano Pun Chong*,
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
Takashi Nogami,
and
Michio Sorai*
=============================
Articles
Analitical and Inorganic
=============================
GO TO the graphical abstract
GO TO the graphical abstract
and
Wasuke Mori
GO TO the graphical abstract
Yoshinobu Sato,
Hideji Kato,
Mami Mori,
Dai Ooyama,
Hirotaka Nagao, and
F. Scott Howell*
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
Noriaki Narita,
Makoto Sakurai, and
Hirokazu Suzuki
GO TO the graphical abstract
GO TO the graphical abstract
=============================
Articles
Orgainc and Biological
=============================
GO TO the graphical abstract
and
Yukio Nishimura
-Cyclodextrins Bearing Naphthyl Moieties
GO TO the graphical abstract
GO TO the graphical abstract
Yuzo Fujiwara,
and
Yoshinobu Yokomori
GO TO the graphical abstract
Yasuaki Esumi,
and
Hiroyoshi Kuzuhara*
GO TO the graphical abstract
,
and
Shigehiko Shimada
GO TO the graphical abstract
Tomohiro Adachi,
Koji Yamamoto,
and
Hiroshi Matsubara*
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
ki
GO TO the graphical abstract
GO TO the graphical abstract
Ayumi Kashiwada,
Mamoru Mimuro,
and
Mamoru Nango*,
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
=============================
Articles
Applied and Materials
=============================
GO TO the graphical abstract
GO TO the graphical abstract
Go to the Full Text PDF
Copyright (C) 2000 The Chemical Society of Japan
=============================
Accounts
=============================
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 1-17 (2000) [Vol. 73, No. 1, January, 2000]
The chemistries of compound ( 2 ) and of derivatives of compounds ( 1 )-( 7 ) are described based on the results in the author's laboratories.
Return to the table of contents [next] [category] [top]
=============================
Articles
General and Physical
=============================
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 19-27 (2000) [Vol. 73, No. 1, January, 2000]
The impedance response of the composite film is reasonably explained by the diffusion-migration transport of both holes and protons. Changes in D with the oxidation and protonation levels of polyaniline suggest that the charge-transport rate is controlled by electron transport, which occurs via interchain electron hopping.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 29-36 (2000) [Vol. 73, No. 1, January, 2000]
We present from density-functional-theory (DFT) calculations how ``
-oxygen" on Fe-ZSM-5 zeolite, a surface oxygen species responsible for high reactivity in oxidation of methane and of benzene, is generated upon decomposition of dinitrogen oxide (N2
O).
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 37-42 (2000) [Vol. 73, No. 1, January, 2000]
The HCl addition effect on the CIDEP indicates the existence of two mechanisms for the photosensitization of maleimide by xanthone. One is a typical T-T energy transfer followed by a hydrogen-abstraction reaction. The other is an electron transfer to maleimide from the xanthone ketyl radical.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 43-51 (2000) [Vol. 73, No. 1, January, 2000]
Kazunaka Endo,*,
and
Delano Pun Chong*,
Theoretical valence photoelectron and UV-visible absorption spectra of four stable conductive molecules have been obtained by semiempirical HAM/3 and ZINDO MO calculations, respectively. The theoretical valence spectra of the four conducting compounds are in good agreement with the observed ones.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 53-60 (2000) [Vol. 73, No. 1, January, 2000]
The title reaction was investigated directly by the laser-induced fluorescence method. The rate constant obtained was significantly different from those in the previous studies. The tunneling effect was shown to be important and the characteristic nonlinear pressure dependence at low-pressure limit was discussed.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 61-65 (2000) [Vol. 73, No. 1, January, 2000]
A fused polycyclic aromatic compound, rubrene (RB), has been found to form a charge-transfer compound with iodine with the stoichiometry of RB.I9
. In this crystal, a unique branched crank-shaped one-dimensional (I9-
)
polyiodide chain is formed.
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 67-71 (2000) [Vol. 73, No. 1, January, 2000]
Takashi Nogami,
and
Michio Sorai*
Heat capacity measurements by means of adiabatic calorimetry revealed that a ferromagnetic phase transition occurred at TC = 0.28 K and a short-range order effect above TC , which is well explained by the S = 1/2 two-dimensional ferromagnetic Heisenberg model of square lattice.
Return to the table of contents [next] [category] [top]
=============================
Articles
Analitical and Inorganic
=============================
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 73-80 (2000) [Vol. 73, No. 1, January, 2000]
Catecholamines accelerated copper-catalyzed oxidation of cysteine under aerobic conditions, but had no effect under anaerobic conditions.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 81-84 (2000) [Vol. 73, No. 1, January, 2000]
and
Wasuke Mori
Phenoxo-bridged cobalt(II) compounds were prepared, and their temperature-variable magnetic susceptibilities were determined in order to evaluate the exchange-coupling strengths between the cobalt(II) ions. The coupling strength was considered in terms of the structural parameters and the electronic effects of the substituent.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 85-95 (2000) [Vol. 73, No. 1, January, 2000]
Yoshinobu Sato,
Hideji Kato,
Mami Mori,
Dai Ooyama,
Hirotaka Nagao, and
F. Scott Howell*
Either cis -[Ru(NO. )(ONO2 )(bpy)2 ]+ or cis -[Ru(NO. )(CH3 CN)(bpy)2 ]2+ undergoes an oxygen-transfer reaction to give an identical cis -[Ru(NO2 )(CH3 CN)(bpy)2 ]+ , during the course of the degradations, but their reaction sequences monitored by HDV definitely differ. Possible mechanistic processes are proposed for both cases based on their degradation sequences, although a further detailed investigation is required.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 97-105 (2000) [Vol. 73, No. 1, January, 2000]
Three teranary Pt complexes with bipyridine and N -arylmethyl-ethanediamine were prepared. The X-ray crystallography showed that intramolecular stacking between the aryl group and bipyridine occurs when the aryl is 1-naphtyl or 9-anthryl, but does not when the aryl is phenyl.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 107-113 (2000) [Vol. 73, No. 1, January, 2000]
The extraction constants of CuA2 were independent on the chain length of carboxylic acids, as expected from the theory that four kinds of the equilibrium constants, of which the extraction constant consists, can be compensated. However, Kdim-1 ( = [Cu2 A4 ]o /[CuA2 ]o2 ) were found to be dependent on the chain length.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 115-119 (2000) [Vol. 73, No. 1, January, 2000]
Noriaki Narita,
Makoto Sakurai, and
Hirokazu Suzuki
Ammonium polyphosphate (APP) form II was prepared by heating of a mixture of ammonium orthophosphate and urea at 280 to 300 °C under wet ammonia. The following reaction process is proposed:
The addition of APP form II to the raw material shortend the preparation time very much.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 121-127 (2000) [Vol. 73, No. 1, January, 2000]
The chemical stability of large organic molecule-metal complexes (LOMMCs) in pond water, observed as Peak I and Peak II in the chromatograms, were investigated by a SEC/UV/ICP-MS system. As a result, a string ball model for the dissolved forms of trace metals in natural water is proposed here.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 129-130 (2000) [Vol. 73, No. 1, January, 2000]
Newly prepared [RhCl(nbd)(dmap)] ( 1 ) and the known complex [RhCl(nbd)(PPh3 )] ( 2 ) were structurally characterized in the solid state and in solution.
Return to the table of contents [next] [category] [top]
=============================
Articles
Orgainc and Biological
=============================
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 131-145 (2000) [Vol. 73, No. 1, January, 2000]
and
Yukio Nishimura
The gas-phase ion-molecule reactions of CH5 + , C2 H5 + , and C3 H5 + with PhX [X = OH, CH2 OH, CH2 CH2 OH, CH(OH)CH3 ] have been studied using an ion-trap type of GC/MS at a low pressure. The reaction mechanism is discussed based on product ion distributions and semi-empirical calculations of the energies of intermediates and products.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 147-154 (2000) [Vol. 73, No. 1, January, 2000]
-Cyclodextrins Bearing Naphthyl Moieties
We prepared a polyrotaxane which is composed of about 15
-cyclodextrins each bearing roughly two naphthalenes and poly(ethylene oxide)diamine terminated with adamantane groups at both ends. Energy transfer occurs from the naphthalene moieties to the dansyl unit of dansyl modified 
-cyclodextrin (Dns
-CD) via host-guest complexation.
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 155-161 (2000) [Vol. 73, No. 1, January, 2000]
Yuzo Fujiwara,
and
Yoshinobu Yokomori
The reaction of thiobenzophenones with phenyl[2-(trimethylsilyl)phenyl]iodonium triflate in the presence of tetrabutylammonium fluoride afforded [4+2] cycloadducts, whereas [2+2] cycloadducts were obtained by using thiopivalophenones as substrates.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 163-171 (2000) [Vol. 73, No. 1, January, 2000]
Yasuaki Esumi,
and
Hiroyoshi Kuzuhara*
Pseudoglycolipid derivatives of chitopentaose and chitoheptaose were synthesized using a 1,6-anhydro-2-azido-2-deoxy-
-
D
-glucopyranose derivative and a chitobiose derivative. Micelle formation of both derivatives was assumed from the results obtained by dye solubilization tests.
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 173-183 (2000) [Vol. 73, No. 1, January, 2000]
,
and
Shigehiko Shimada
Four tri-O
-benzyl derivatives of 2-deoxy-2-(2,4-dinitroanilino)-
D
-glucopyranose were synthesized.
-Glycosylation using the 1-OH derivative (
A
) as glycosyl donor and a reagent mixture of p
-NO2
C6
H4
SO2
Cl, CF3
SO3
Ag, and Et3
N was carried out. Starting from the 4-OH derivative (
B
), as acceptor, O
-
-
D
-Galp
-(1
4
)-O
-
-
D
-Galp
-(14
)-
D
-GlcNAcp (
C
), the sugar cluster of the epitope of P1
-antigen of human erythrocite, was synthesized.
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 185-189 (2000) [Vol. 73, No. 1, January, 2000]
Tomohiro Adachi,
Koji Yamamoto,
and
Hiroshi Matsubara*
The syntheses of the title compounds, which are precursors for 8-shaped circulene, are described. The unusually strained structures were supported by their 1 H NMR spectra, electronic spectra, and X-ray crystallographic analyses.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 191-196 (2000) [Vol. 73, No. 1, January, 2000]
The cholesteric pitch values of the induced cholesteric phases were changed reversibly by the photochromism of doped chiral fulgide derivatives in a nematic liquid crystal. The cholesteric sense was also changed reversibly by the photochromism of a dopant with the aid of a non-photochromic chiral dopant.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 197-203 (2000) [Vol. 73, No. 1, January, 2000]
The utility of the thioester method for the preparation of phosphorylated polypeptide has been proven by synthesizing the phosphorylated cAMP response element binding protein 1 (19-106) amide as a model compound.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 205-213 (2000) [Vol. 73, No. 1, January, 2000]
ki
The rotational barriers of C(sp)-C(sp3 ) bonds in the title compounds are enhanced as the steric size of the substituents, X and Y, is increased. This effect is discussed on the basis of the molecular structures and molecular interactions.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 215-220 (2000) [Vol. 73, No. 1, January, 2000]
Synthesis of tricyclic ladder siloxane, hexasilsesquioxane (T6 ), and octasilsesquioxane (T8 ) was performed starting from tetraisopropyltetrasiloxanetetraol. The structure of each compound was determined by X-ray crystallography.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 221-229 (2000) [Vol. 73, No. 1, January, 2000]
Ayumi Kashiwada,
Mamoru Mimuro,
and
Mamoru Nango*,
The linear dichroism spectra of the light-harvesting polypeptide/bacteriochlorophyll (BChl a ) complex isolated from photosynthetic bacteria, Rhodospirillum rubrum , show that the orientation of the Qy band of BChl a in LH/BChl a is perpendicular and geometrically homogeneous for the transmembrane axis of LH/BChl a .
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 231-235 (2000) [Vol. 73, No. 1, January, 2000]
Enantiomerically pure L -BPA (4-borono- L -phenylalanine) was synthesized from L -tyrosine or 4-iodo- L -phenylalanine derivatives using the palladium-catalyzed cross-coupling reaction of pinacolborane in high chemical yields.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 237-242 (2000) [Vol. 73, No. 1, January, 2000]
An extremely high directive effect by the 2-axially substituted hydroxy group appeared in the LiAlH4 , NaBH4 , and Zn(BH4 )2 reduction of cyclohexanones, while the 3-axially substituted one exhibited only the steric hindrance.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 243-247 (2000) [Vol. 73, No. 1, January, 2000]
The oxidation potentials of organoheteroatom compounds having a 2-(2-pyridyl)ethyl group were found to be less positive than those of the corresponding compounds having a phenyl group. Stabilization of the cation radical intermediate by the dynamic coordination seems to be responsible.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 249-250 (2000) [Vol. 73, No. 1, January, 2000]
Several
-(trifluoromethyl)heteroarylmethanols are prepared by the substitution of pyrrole, thiophene, furan, and uracils with trifluoroacetalehyde ethyl hemiacetal in the presence or absence of catalysts.
=============================
Articles
Applied and Materials
=============================
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 251-258 (2000) [Vol. 73, No. 1, January, 2000]
ORMOSIL composites incorporated with [Eu(phen)2 ]Cl3 or [Tb(bpy)2 ]Cl3 were prepared via the sol-gel method over a wide matrix composition range. The emission intensity varieties of the obtained composites were interpreted from the viewpoint of the local environment around the complex molecules. Simplified models of the ORMOSIL complex-containing composites were proposed.
Return to the table of contents [next] [category] [top]Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 259-265 (2000) [Vol. 73, No. 1, January, 2000]
Optically active alkyl 2-methylchroman-2-carboxylates were shown to have high helical twisting power, and to be good chiral dopants for the nematic liquid-crystal phase. Considering the synthetic route, the combination of synthesis and the chiral resolution of 6-benzyloxy-2-methylchroman-2-carboxylic acid, the present dopants are practically interesting.
Return to the table of contents [next] [category] [top]
