Structure and photoconductive behaviour of a sanidic liquid crystal |
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| Authors: | D Haristoy S Mery B Heinrich L Mager J F Nicoud D Guillon |
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| Institution: | 1. Department of Chemistry , University of the Western Cape , Private Bag X17, Bellville 7535, South Africa;2. Department of Chemistry and Biotechnolgy , School of Engineering , The University of Tokyo , Hongo Campus, Tokyo, Japan |
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| Abstract: | A series of 1]benzothieno3,2-b]1]benzothiophene-2,7-dicarboxylate derivatives consisting of a flat, conjugated aromatic moiety containing sulphur hetero-atoms and substituted by terminal chains - ethyl, decyl, Z-4-decenyl or 2-(2-butoxyethoxy)ethyl - has been synthesized. These materials exhibit a smectic liquid crystalline phase, the stability of which was found to be strongly dependent on the length and the nature of the terminal chains. In the mesophase, the molecular arrangement within the smectic layer is characterized by a local stacking of the rigid parts similar to that found in discotic columnar systems. Finally, clear photoconductive behaviour was found in mechanically aligned samples of these liquid crystals. |
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| Keywords: | lactate unit dielectric properties orthoconic bromine substitution |
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