A smectic T phase of 1,4-dialkyl-1,4-diazoniabicyclo[2.2.2]octane dibromides
作者： Kazuchika Ohta , Teruki Sugiyama , Takashi Nogami
DOI: 10.1039/A906922D
关键词: Phase (matter) 、 Stereochemistry 、 Homeotropic alignment 、 Differential scanning calorimetry 、 Crystallography 、 Bicyclic molecule 、 Liquid crystal 、 Chemistry 、 Tetragonal crystal system 、 Mesophase 、 Octane
摘要: An unidentified phase X of 1,4-dialkyl-1,4-diazoniabicyclo[2.2.2]octane dibromides reported by Nogami et al. in 1985 was reinvestigated differential scanning calorimetry, polarizing microscopy and temperature-dependent X-ray diffraction. The thus established as a smectic tetragonal (ST) mesophase which shows spontaneous homeotropic alignment.
rsc.org
nctu.edu.tw参考文章(4)
E. Alami, H. Levy, R. Zana, P. Weber, A. Skoulios, A new smectic mesophase with two dimensional tetragonal symmetry from dialkyldimethylammonium bromides: ST Liquid Crystals. ,vol. 13, pp. 201- 212 ,(1993) , 10.1080/02678299308026294
J. Shimizu, T. Nogami, H. Mikawa, Phase transition of quaternary alkyl halide salts of diazabicyclo [2.2.2] octane Solid State Communications. ,vol. 54, pp. 1009- 1011 ,(1985) , 10.1016/0038-1098(85)90175-9
Seiji Ujiie, Kazuyoshi Iimura, Thermal properties and orientational behavior of a liquid-crystalline ion complex polymer Macromolecules. ,vol. 25, pp. 3174- 3178 ,(1992) , 10.1021/MA00038A024
Jun Shimizu, Kengo Imamura, Takashi Nogami, Hiroshi Mikawa, Phase Transition of Quaternary Alkyl Halide Salts of 1,4-Diazabicyclo[2.2.2]octane Bulletin of the Chemical Society of Japan. ,vol. 59, pp. 1443- 1448 ,(1986) , 10.1246/BCSJ.59.1443