Zobrazeno 1 - 10
of 207
pro vyhledávání: '"Yoshio Matsunaga"'
Dielectric Study on Some Solid Complexes: Molecular Motion in the Isomorphous High-temperature Forms
Autor:
S. Terada, Yoshio Matsunaga
Publikováno v:
Molecular Crystals and Liquid Crystals. 381:163-168
The relative permittivity of pyrene-2,4-dinitrofluorobenzene, -2,4-dinitrochloro-benzene, -2,4-dinitrotoluene, -2,4-dinitrophenol complexes, and fluoranthene-2,4-dinitrophenol complex increases abruptly upon the polymorphic transition. The molar pola
Publikováno v:
Liquid Crystals. 27:1399-1403
DSC, X-ray, broad-line proton NMR, and microscopy studies on several series of N,N' -dialkanoylbenzene-1,2-diamines are presented. The melting point and associated enthalpy are not much affected by methylation of the aromatic nucleus. While the dimet
Publikováno v:
Inorganic Chemistry. 37:882-889
A series of bis[4-alkoxy-N-(4-ethoxyphenyl)salicylaldiminato]copper(II) complexes have been prepared and shown to possess smectic A phases with isotropization temperatures ranging from 157 to 182 °C over butoxy to octadecyloxy homologues. Correspond
Autor:
Yoshio Matsunaga, K. Kurihara
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 289:207-220
The thermal behavior of alkylamine-zinc bromide adducts, (RNH2) 2 ZnBr2, has been studied by differential scanning calorimetry, powder X-ray diffractometry, and broad-line 1H NMR spectrometry. An enantiotropic mesophase is observed for the adducts of
Autor:
Wakako Yamazaki, Toshinobu Sekiuchi, Naomi Hoshino-miyajima, Taka Yuki Sasaki, Yoshio Matsunaga
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 286:311-316
New series of copper-salicylaldimine mesogens carrying 4-alkanoyloxy substituents of varied size on the N-phenyl group have been prepared and characterized for their liquid crystalline behaviors. These complexes are commonly smectogenic, and a tilted
Publikováno v:
J. Mater. Chem.. 5:2305-2308
Syntheses, differential scanning calorimetric (DSC) and X-ray diffraction (XRD) studies were carried out on the following four series of compounds: the 5-methyl-2-alkanoyloxy, 4,5-dimethyl-2-alkanoyloxy, 2-methyl-5-tert-butyl-4-methoxy and 2,5,6-trim
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 257:27-33
Five series of smectogenic alkylammonium (C n H2n+1NH+ 3) benzenesulfonates were prepared introducing p−chloro, p−hydroxy, o-nitro, m−nitro, and p−nitro substituents to the aromatic nucleus, respectively. All the butyl to octadecylammonium sa
Publikováno v:
Liquid Crystals. 17:659-666
DSC and X-ray diffraction studies on a series of 1,3-phenylene bis[4-(4-alkoxyphenyliminomethyl)benzoates] are presented. The only mesophase exhibited by the methoxy to hexadecyloxy homologues is of the smectic C type. The reversal of the iminomethyl
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 250:161-166
Two series of smectogenic salts were obtained by combining alkyl p-aminobenzoates with p-ethyl- and p-chlorobenzenesulfonic acids, respectively. The shortest ester alkyl chain required to generate a smectic A phase is nonyl when the former sulfonic a
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 238:197-206
The nematic-isotropic transition temperature of phenyl 4-(4-X-substituted phenyliminomethy1)benzoate and its seven isomeric compounds carrying only one terminal substituent; i.e., methoxyl, ethoxyl, nitro, or cyano group, has been compared. The tempe