Synthesis of asymmetric tolane liquid crystals for display applications

Kuen-Torng Tsay; Chain-Shu Hsu; Shin-Tson Wu

doi:10.1117/12.311057

17 June 1998 Synthesis of asymmetric tolane liquid crystals for display applications

Kuen-Torng Tsay; Chain-Shu Hsu; Shin-Tson Wu

Author Affiliations +

Proceedings Volume 3421, Display Technologies II; (1998) https://doi.org/10.1117/12.311057
Event: Asia Pacific Symposium on Optoelectronics '98, 1998, Taipei, Taiwan

Abstract

Four series of trans-cyclohexyl-based tolanes, i.e., 4- (trans-4-alkylcyclohexy)-4'-fluorotolanes, 4-(trans-4-alkyl- cyclohexyl)-3',4'-difluorotolanes, 4-[2-(trans-4-alkyl- cyclo-hexyl)ethyl]-4'-alkyltolanes and fluorinated 4- [2-(trans-4-alkylcyclohexyl)ethyl] tolanes are prepared and characterized. All the obtained compounds display nematic liquid crystalline phases. The results demonstrate that incorporation of a cyclohexyl ring in the mesogen core structure leads to form a wide temperature range of mesophase. However it also increases the tendency to form a smectic phase. The dielectric anisotropy and birefringence of some selected compounds were measured by a guest-host method. All of those compounds studied show relatively high dielectric anisotropy and birefringence.

Citation Download Citation

Kuen-Torng Tsay, Chain-Shu Hsu, Shin-Tson Wu, "Synthesis of asymmetric tolane liquid crystals for display applications", Proc. SPIE 3421, Display Technologies II, (17 June 1998); doi: 10.1117/12.311057; https://doi.org/10.1117/12.311057

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