Tilted Layered Phases: The Influence of the Inclusion of a Non-Linear Macrocycle in Calamitic Liquid Crystals - Synthesis and Phase Behaviour

This paper describes the synthesis and the characterisation of the phase behaviour of a homologous series based on the macrocycle 1,7-diaza-4.10,13-tri-oxa-cyclopentadecane. The mesogenic units attached to the two aza-groups consist of three aromatic rings and the length of the terminal chain is var...

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Bibliographic Details
Published in:Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals Molecular crystals and liquid crystals, 1997-09, Vol.304 (1), p.223-230
Main Authors: Tuffin, R. P., Mehl, G. H., Toyne, K. J., Goodby, J. W.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Experimental determinations of smectic, nematic, cholesteric, and other structures
Liquid crystals
Physics
Structure of solids and liquids
crystallography
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Summary:This paper describes the synthesis and the characterisation of the phase behaviour of a homologous series based on the macrocycle 1,7-diaza-4.10,13-tri-oxa-cyclopentadecane. The mesogenic units attached to the two aza-groups consist of three aromatic rings and the length of the terminal chain is varied between six and sixteen methylene groups. Three different types of tilted smectic phases were observed which are believed to differ in their layer packing in that one may have aligned tilt (normal smectic C) and the other two may have alternating tilt.
ISSN:1058-725X
DOI:10.1080/10587259708046964