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15 October 1993 Investigation of the smectic layer spacing in the homologous series of 4-isothiocyanatophenyl 4-(trans-4-alkylcyclohexyl) benzoates
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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 (A1c).
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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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