期刊
TETRAHEDRON LETTERS
卷 47, 期 50, 页码 8993-8997出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2006.09.167
关键词
ionic liquid crystals; triphenylene; cyanobiphenyl; discotic liquid crystals; imidazolium salts; microwaves
Microwave promoted synthesis of novel imidazolium-based ionic liquid crystalline dimers containing calamitic-calamitic, calamitic-discotic and discotic-discotic moieties is reported. Classical reactions failed to produce these dimers. The thermotropic liquid crystalline properties of these salts were investigated by polarizing optical microscopy, differential scanning calorimetry and X-ray diffractometry. These salts, except the one having calamitic-discotic units, with bromide as counter ion were found to be mesomorphic over a wide temperature range. (c) 2006 Elsevier Ltd. All rights reserved.
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