Dimesogenic compounds consisting of a cholesteryl moiety and an aromatic mesogen interconnected through a central pentamethylene spacer

Citation
Sw. Cha et al., Dimesogenic compounds consisting of a cholesteryl moiety and an aromatic mesogen interconnected through a central pentamethylene spacer, LIQ CRYST, 26(9), 1999, pp. 1325-1337
Citations number
33
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
LIQUID CRYSTALS
ISSN journal
02678292 → ACNP
Volume
26
Issue
9
Year of publication
1999
Pages
1325 - 1337
Database
ISI
SICI code
0267-8292(199909)26:9<1325:DCCOAC>2.0.ZU;2-3
Abstract
New non-symmetric dimesogens consisting of a cholesteryl moiety and an arom atic mesogenic unit interconnected through a pentamethylene spacer have bee n prepared. The aromatic units consist of two phenyl rings linked by carbox y, oxycarbonyl, ethylene, ethynylene, azo or Schiff's base groups. The meso morphic and transitional properties have been investigated by using optical microscopy, differential scanning calorimetry, helical pitch measurements, and electric held and miscibility studies. The structures of the mesophase s have been studied using X-ray diffraction. Several kinds of smectic packi ngs are observed depending on the nature of the linking group and an attemp t to understand the origin of the different phase structures at a molecular level is made.