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11.
J.?F.?Q.?Rey T.?S.?Plivelic R.?A.?Rocha S.?K.?Tadokoro I.?Torriani E.?N.?S.?MuccilloEmail author 《Journal of nanoparticle research》2005,7(2-3):203-208
This paper describes the synthesis of indium oxide by a modified sol–gel method, and the study of thermal decomposition of the metal complex in air. The characterization of the intermediate as well as the final compounds was carried out by thermogravimetry, differential thermal analysis, Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and small angle X-ray scattering. The results show that the indium complex decomposes to In2O3 with the formation of an intermediate compound. Nanoparticles of cubic In2O3 with crystallite sizes in the nanosize range were formed after calcination at temperatures up to 900°C. Calcined materials are characterized by a polydisperse distribution of spherical particles with sharp and smooth surfaces.This revised version was published online in August 2005 with a corrected issue number. 相似文献
12.
13.
14.
Tamotsu Tanaka Yozo Chatani Hiroyuki Tadokoro 《Journal of Polymer Science.Polymer Physics》1974,12(3):515-531
The crystal structure of polyisobutylene was determined by x-ray analysis. The orthorhombic cell, with a = 6.88 Å, b = 11.91 Å, c (fiber axis) = 18.60 Å (space group: P212121 ? D), contains two molecular chains each consisting of eight monomeric units in the fiber identity period. The chain conformation is essentially an (8/3) helix, but deviates appreciably from the exact (8/3) helix symmetry. The symmetry of the molecular chain is only a twofold screw axis in exact sense, and a crystallographic asymmetric unit consists of four monomeric units. The torsional angles are where M denotes the methyl group. The averaged skeletal C? CH2? C and C? CM2? C bond angles are 128° and 110°, respectively. The large C? CH2? C bond angles may be due to steric respulsion between the adjacent methyl groups, giving intramolecular distances larger than 3.09 Å. 相似文献
15.
M. Kimura S. Okutani T. Churiki T. Akahane H. Toriumi T. Tadokoro 《Molecular Crystals and Liquid Crystals》2013,570(1):681-689
Abstract The birefringence, the twist angle and the thickness of the nematic liquid crystal sample were determined by means of the renormalized transmission ellipsometry. It was proposed that conventional sandwich-type cell is applicable to this ellipsometry measurement and the simplified numerical fitting procedure based on the 4 × 4 matrix method can provide the dispersion of the ordinary and the extraordinary refractive indices. The resolution of the twist angle and cell thickness measurement reaches to 0.05 deg. and 0.05 μm, respectively. 相似文献
16.
Conventional stochastic resonance in terms of signal-to-noise ratio refers to the amplification of a weak signal in the average of the output. In this framework, only the first moment of the output is used for extracting the information about the input signal. However, higher order moments are also modulated by the input signal. We report the occurrence of stochastic resonance in higher moments. Furthermore, by the linear combination of moments, the signal-to-noise ratio improves compared with the conventional method, which uses the lowest moment only. 相似文献
17.
Yuko Hasegawa Shuhei Saitou Sayaka Tamaki Hirofumi Yajima Makoto Tadokoro 《Helvetica chimica acta》2009,92(11):2565-2575
The UV, excitation, and luminescence spectra of tris(pivaloyltrifluoroacetonato)europium(III) ([Eu(pta)3]; Hpta=1,1,1‐trifluoro‐5,5‐dimethylhexane‐2,4‐dione=HA) were measured in the presence of bis(salicylidene)trimethylenediamine (H2saltn), bis[5‐(tert‐butyl)salicylidene]trimethylenediamine (H2(tBu)saltn), or bis(salicylidene)cyclohexane‐1,2‐diyldiamine (H2salchn), and the corresponding ZnII complexes [ZnB] (B=Schiff base). The excitation and luminescence spectra of the solution containing [Eu(pta)3] and [Zn(salchn)] exhibited much stronger intensities than those of solutions containing the other [ZnB] complexes. The introduction of a tBu group into the Schiff base was not effective in sensitizing the luminescence of [Eu(pta)3]. The luminescence spectrum of [ZnB] showed a band around 450 nm. The intensity decreased in the presence of [Eu(pta)3], reflecting complexation between [Eu(pta)3] and [ZnB]. On the basis of the change in intensity against the concentration of [ZnB], stability constants were determined for [Eu(pta)3Zn(saltn)], [Eu(pta)3Zn{(tBu)saltn}], and [Eu(pta)3Zn(salchn)] as 4.13, 4.9 and 5.56, respectively (log , where =[[Eu(pta)3ZnB]]([[Eu(pta)3]][[ZnB]])?1). The quantum yields of these binuclear complexes were determined as 0.15, 0.11, and 0.035, although [Eu(pta)3Zn(salchn)] revealed the strongest luminescence at 613 nm. The results of X‐ray diffraction analysis for [Eu(pta)3Zn(saltn)] showed that ZnII had a coordination number of five and was bridged with EuIII by three donor O‐atoms, i.e., two from the salicylidene moieties and one from the ketonato group pta. 相似文献
18.
19.
Hiroaki Saito Kousuke Inoue Keiji Matsumoto Makoto Tadokoro Yukio Nakamura 《Journal of Cluster Science》1998,9(2):145-164
The oxidative addition reaction of 2,6-bis(bromomethyl)pyridine to Ru3(CO)12 gave scarcely soluble {Ru2Br2(-Q)(CO)4}
n
, 1, [Q=C5H3N-2-C(O)CH2-6-CH2] or a mixture of 1 and the mononuclear complex RuBr(Q)(CO)3, 2, [Q=C5H3N-2-C(O)CH2-6-CH2Br] according to the reactant's mole ratio. Further reactions of 1 with some N- and P-donor ligands (L) afforded readily soluble dinuclear complexes, Ru2(-Br)(-Q)Br(CO)
n
(L)
m
[n=4, m=1, L=PPh3
3a, or py 3b; n=3, m=2, L=PPh3
5a, or PPh2(o-tolyl) 5b]. In this paper, the characterization of these products by the elemental analyses and the spectroscopic methods are described. The X-ray crystal structures of Ru2(-Br) (-Q)Br(CO)4(PPh3)(MeOH), 4, which was obtained by crystallization of 3a from MeOH, and of 5a · (2CHCl
3
) are also described. Each of the metal atoms in 4 has a distorted octahedral coordination, while in 5a · (2CHCl
3
) one metal atom takes a distorted octahedral geometry and the other pseudooctahedral, which is completed by presenting a Ru ··· Br secondary bonding interaction. 相似文献
20.