- Effect of Heteroatoms in the Side Chains of Disklike Molecules on the Formation of Discotic Liquid Crystalline Phases
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Incorporation of oxygen and sulfur atoms into the side chains of discotic liquid crystals generally results in a depression of both the crystal to discotic and discotic to isotropic transition temperatures relative to the n-alkyl analogue.In contrast, replacement of the methylenes in side-chain positions 4 of 2,3,6,7,10,11-hexakis(alkanoyloxy)triphenylenes increases the clearing (M-I) temperature from 120 to 200 deg C.This effect is specific for sulfur substitution, to the triphenylene series, and to the 4-position.It is not expected, based on a simple model for discotic-phase formation.
- Collard, David M.,Lillya, C. Peter
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p. 6064 - 6066
(2007/10/02)
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- Liquid Crystals. 1. β-Oxygen Effect on Stabilization of Hexakis(acyloxy)benzene Mesophase
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A new family of liquid crystalline (discotic) hexaesters, hexakisbenzene (4*On, 2 n 7), hexakisbenzene (4*S3), or hexakisbenzene (5), was prepared from hexahydr
- Tabushi, Iwao,Yamamura, Kazuo,Okada, Yukihiro
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p. 2502 - 2505
(2007/10/02)
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