Investigation of the smectic layer spacing in the homologous series of 4-isothiocyanatophenyl 4-(trans-4-alkylcyclohexyl) benzoates

Roman S. Dabrowski; Jerzy Dziaduszek; Jan Przedmojski; J. Baran; Jan Jadzyn; Grzegorz Czechowski

doi:10.1117/12.156969

15 October 1993 Investigation of the smectic layer spacing in the homologous series of 4-isothiocyanatophenyl 4-(trans-4-alkylcyclohexyl) benzoates

Roman S. Dabrowski, Jerzy Dziaduszek, Jan Przedmojski, J. Baran, Jan Jadzyn, Grzegorz Czechowski

Author Affiliations +

Proceedings Volume 1845, Liquid and Solid State Crystals: Physics, Technology and Applications; (1993) https://doi.org/10.1117/12.156969
Event: Liquid and Solid State Crystals: Physics, Technology, and Applications, 1992, Zakopane, Poland

Abstract

The homologous series of 4-isothiocyanatophenyl 4-(trans-4-alkylcyclohexyl) benzoates containing members with alkyl chain ethyl to dodecyl were synthesized and their phase transition temperatures, smectic layer spacing, and dielectric permittivity were measured. It was observed that smectic A₁ layer spacing is expanding from d/1 on the order of magnitude 1 to d/1 on the order of magnitude 1.1 when alkyl is increasing from butyl to dodecyl. This behavior is accompanied by the great change in (epsilon) (perpendicular) which is strongly increasing from pentyl to octyl and then from nonyl begins to decrease. It was proposed to term smectic A₁ with d/1 > 1 enhanced smectic A₁ (A_1c).

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Roman S. Dabrowski, Jerzy Dziaduszek, Jan Przedmojski, J. Baran, Jan Jadzyn, and Grzegorz Czechowski "Investigation of the smectic layer spacing in the homologous series of 4-isothiocyanatophenyl 4-(trans-4-alkylcyclohexyl) benzoates", Proc. SPIE 1845, Liquid and Solid State Crystals: Physics, Technology and Applications, (15 October 1993); https://doi.org/10.1117/12.156969

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