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Acta Chimica Sinica ›› 2007, Vol. 65 ›› Issue (21): 2499-2504. Previous Articles
汪必琴,王新玲,赵可清*,胡平
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WANG Bi-Qin; WANG Xin-Ling; ZHAO Ke-Qing*; HU Ping
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Perfluorinated or semi-perfluorinated alkyl chain containing achiral liquid crystals can display ferroelectric liquid crystalline properties, which have great potential applications to industry, therefore have attracted the attention of researchers. In this report, biphenylyl 4-perfluorohexylbenzoate liquid crystalline compounds ROC6H4C6H4O2CC6H4C6F13 and C3H7C6H4C6H4O2CC6H4C6F13, (R=CnH2n+1, n=6, 8, 10, 12, 16) have been synthesized. Their mesogenic behavior was investigated with differential scanning calorimetry (DSC) and polarized op-tical microscopy (POM). The results showed that the alkyl chain compounds exhibited nematic phases with higher melting points, lower clearing points, therefore narrower mesophase temperature ranges. The per-fluoroalkyl chain containing molecules showed highly ordered smectic phases with lower melting points, higher clearing points and broader mesophases.
Key words: liquid crystal, 4-propylbiphenyl-4'-ol, perfluoroalkyl chain, fluorophilic effect, fluorophobic effect
WANG Bi-Qin; WANG Xin-Ling; ZHAO Ke-Qing*; HU Ping. Synthesis and Mesomorphism of Perfluoroalkyl Chain Containing Biphenyl Liquid Crystals[J]. Acta Chimica Sinica, 2007, 65(21): 2499-2504.
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