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Synthesis and Properties of Dimesogenic Compounds Containing Cholesterol and 4‐( trans ‐4‐ n ‐Alkylcyclohexyl)‐benzoic Acid Moieties
Author(s) -
YU Haibo,
HOU Ruibin,
CHEN Tie,
YIN Bingzhu,
MUHAMMAD Jamil,
JEON Youngjae
Publication year - 2009
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200990235
Subject(s) - chemistry , mesogen , mesophase , benzoic acid , liquid crystal , organic chemistry , viscosity , phase (matter) , stereochemistry , crystallography , polymer chemistry , liquid crystalline , physics , quantum mechanics , optics
A series of novel dimesogenic compounds containing cholesterol and 4‐( trans ‐4‐ n ‐alkylcyclohexyl)benzoic acid moieties were synthesized. The two mesogenic units of these compounds are linked with ω ‐oxyalkanoyl spacers of varying lengths. The chemical structure and mesomorphic properties of this series of compounds were characterized by FT‐IR, MS, 1 H NMR, polarizing optical microscopy (POM) and DSC techniques. The average viscosity and helical twisting power (HTP) in host liquid crystals of selected dimesogenic compounds were also measured. It was found that most of the present novel series of compounds exhibited only cholesteric mesophase with lower phase transition temperatures, and the average viscosity and HTP of selected compounds were similar to or superior to cholesteryl nonylate.