期刊
TETRAHEDRON LETTERS
卷 45, 期 5, 页码 1019-1022出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2003.11.085
关键词
nonlinear optical materials; discotic liquid crystals; left-handed helix
As a novel approach to nonlinear optical materials, new octupolar discotic liquid crystalline materials 1,3,5-triphenyl-2,4,6-triazine derivatives containing achiral alkyl chains (5a) and chiral alkyl chains (5b) at the periphery were synthesized. The former exhibits an ordered hexagonal columnar mesophase, whereas the latter displays a rectangular columnar mesophase. The negative exciton splitting observed in the CD spectrum of a thin film of 5b suggests that it has a left-handed helical structure within the column. (C) 2003 Elsevier Ltd. All rights reserved.
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