H. Takatsu, K. Takeuchi, H. Satō
Dec 1, 1984
Citations
0
Influential Citations
9
Citations
Journal
Molecular Crystals and Liquid Crystals
Abstract
Abstract A series of 3,4-difluorophenyl trans-4′-substituted cyclohexane-1′-carboxylates, which show nematic phases, was prepared and their transition temperatures, enthalpies and entropies were measured. 3,4-Difluorophenyl and 4-fluorophenyl trans-4′-n-pentylcyclohexane-1′-carboxylates were mixed separately with a nematic mixture A consisting of trans-4-n-alkyl-1-(4′-cyanophenyl)cyclohexanes. 3,4-Difluorophenyl trans-4′-n-pentylcyclohexane-1′-carboxylate reduces the threshold voltage more, decreases the N-I transition temperature more, reduces the bulk viscosity less and decreases the birefringence more than 4-fluorophenyl trans-4′-n-pentylcyclohexane-1′-carboxylate. 3,4-Difluorophenyl, 4-fluorophenyl, 3-fluorophenyl and phenyl trans-4′-{β-(trans-4”-n-propylcyclohexyl)-1”) ethylcyclohexane-1′-carboxylates were mixed separately with a mixture B consisting of 4-n-alkoxyphenyl frara-4′-n-alkylcyclohexane-l′-carboxylates and /ram-4-n-alkyl-l-(4′-cyanophenyl)cyclohexanes. The 3,4-difluorophenyl trans-4′-(β-(t...