The inverse phase sequence SmA-SmC in symmetric dimeric liquid crystals

Seven homologous symmetric dimeric liquid crystals are presented where two three-ring mesogenic units are connected by a bis(carbonyloxy)alkylene spacer. For homologues with terminal heptyloxy, octyloxy and nonyloxy chains, the unusual phase sequence SmA-SmC with increasing temperature was detected...

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Bibliographic Details
Published in:Liquid crystals 2000-01, Vol.27 (1), p.43-50
Main Authors: Weissflog, W., Lischka, Ch, Diele, S., Wirth, I., Pelzl, G.
Format: Article
Language:English
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Summary:Seven homologous symmetric dimeric liquid crystals are presented where two three-ring mesogenic units are connected by a bis(carbonyloxy)alkylene spacer. For homologues with terminal heptyloxy, octyloxy and nonyloxy chains, the unusual phase sequence SmA-SmC with increasing temperature was detected by the study of the optical textures and by X-ray diffraction measurements. This unusual behaviour is discussed on the basis of the molecular structure of these compounds.
ISSN:0267-8292
1366-5855
DOI:10.1080/026782900203191