Influence of the molecular length on the occurrence of incommensurate low ordered smectic phases for non-symmetric dimesogenic compounds

Title
Influence of the molecular length on the occurrence of incommensurate low ordered smectic phases for non-symmetric dimesogenic compounds
Authors
F. HARDOUINM. F. ACHARDM. LAGUERREJUNG-IL JIN고두현
Issue Date
1999-06
Publisher
Liquid crystals
Citation
VOL 26, NO 4, 589-599
Abstract
Systematic physical chemistry studies are in progress concerning the occurrence of incommensurate low ordered smectic phases (Sic )² in non-symmetric dimesogens with molecular parameters varying from those of the standard compound KI-5(4). In the present study, the selected molecules possess the same cholesteryl unit and the same spacer length, but the terminal chain of the aromatic mesogenic part is varied. Up to a critical molecular length, a competition between two incommensurate lengths is observed and the dimesogenic compounds respond to the frustration connected to this competition with the formation either of an incommensurate phase Sic or of a two dimensional modulated phase. For longer dimesogens, a commensurate lock-in of the two characteristic lengths systematically occurs.
URI
http://pubs.kist.re.kr/handle/201004/47994
ISSN
02678292
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KIST Publication > Article
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