New pyridinium type thermotropic ionic liquid crystal materials having a 1,3-oxathiane ring in the central core,N-ethyl-4-(5-alkyl-1,3-oxathian-2-yl)pyridinium bromides 8, were synthesized. These compounds exhibited a smectic A phase over a very wide range including room temperature (for example 8c: G –30 SA 21 I).
Y. Haramoto, Y. Akiyama, R. Segawa, S. Ujiie and M. Nanasawa, J. Mater. Chem., 1998, 8, 275 DOI: 10.1039/A707622C
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