PHYSICAL PROPERTIES OF THE CHOLESTERIC MESOPHASE.
Abstract
This report outlines the synthesis of several series of cholesteric liquid crystalline compounds as well as some nematic compounds whose structures lend valuable insight into the structure of cholesteric liquid crystals. One hundred twenty cholesteric compounds are reported of which approximately 80% have not been reported previously. The transition temperatures for the compounds are reported (determined by the use of a Hoover-Thomas apparatus); these temperatures are being refined by the use of differential thermal analysis equipment. The cholesteric compounds reported are derivatives of cholesteryl 4-substituted benzoates, of cholesteryl 4-alkoxybenzoates, of cholesteryl 3-chloro-4-alkoxybenzoates, of methyl 3-beta-(substituted benzyloxy)-delta 5-cholenates, of cholestanyl benzoates, of 6-ketocholestanyl benzoates, of 7-dehydrocholesteryl benzoates, of ergosteryl benzoates, of pregnenolone benzoates, of campesteryl benzoates, of stigmasteryl benzoates, of cholesteryl disubstituted benzoates, and of cholesteryl cinnamates. The nematic compounds reported are terephthal-bis-amino derivatives, terephthal-bis-aniline and bis-aminopyridine derivatives. In addition to reporting the transition temperatures on the cholesteric and nematic liquid crystalline compounds, observations concerning the relationship between the transition temperatures and the character of the substituents in the molecule are included. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 15, 1967
- Accession Number
- AD0822208
Entities
People
- Glenn H. Brown
Organizations
- Kent State University