Crystal structure of a mesogenic twin

Citation
S. Gupta et al., Crystal structure of a mesogenic twin, MOLEC CRYST, 365, 2001, pp. 1499-1507
Citations number
5
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Volume
365
Year of publication
2001
Pages
1499 - 1507
Database
ISI
SICI code
Abstract
The compound under study is a double mesogen in which two rigid p-terphenyl -based units are laterally connected by a carbonate linker. The cystal stru cture has been determined and reported. Here some crystallogra-phic calcula tions have been done to correlate the structure property relationship of th e compound. The six rings are found to be in different conformations. No tw o rings are coplanar. The four decycloxy side chains are maximally extended . Molecules of the compound are packed along the crystallographic a-axis. T he molecular arrangement is a precursor of smectic phase. Texture study has been performed and supercooling region was found. The layer spacing and in termolecular distance during the entire mesomorphic range have been studied from X-ray diffraction technique.