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  • Title: Effects of doping on an unusual smectic- C*alpha-smectic-C*FI2-smectic-C* phase sequence.
    Author: McCoy BK, Liu ZQ, Wang ST, Pan L, Wang S, Nguyen HT, Pindak R, Huang CC.
    Journal: Phys Rev E Stat Nonlin Soft Matter Phys; 2008 Jun; 77(6 Pt 1):061704. PubMed ID: 18643284.
    Abstract:
    The compound 10OHF has a partially inverted phase sequence, unique among the series of nOHF homologous compounds and all other known liquid crystals, with the smectic-C*FI2 (SmC*FI2) phase occurring at higher temperature than the smectic-C* (SmC*) phase. We present ellipsometric data to identify the phase sequences of 9OHF, 10OHF, 11OHF, and 12OHF. Binary mixtures of 10OHF with C11, a compound with the typical phase sequence among the smectic phases, show that the unusual phase sequence of 10OHF stabilizes upon mixing and that SmC*FI2 predominates over SmC* throughout the entire mixing phase diagram. In thin films of some mixtures, surface interactions induce a reentrant SmC*FI2-SmC*-SmC*FI2 transition in the rest of the film.
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