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Supermolecules Containing a Tetrahedral Core: A New Class of Liquid‐Crystalline Siloxanes
Author(s) -
Mehl Georg H.,
Goodby John W.
Publication year - 1996
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19961290508
Subject(s) - mesogen , siloxane , chemistry , tetrahedron , core (optical fiber) , crystallography , phase (matter) , phase transition , side chain , symmetry (geometry) , liquid crystalline , polymer chemistry , organic chemistry , composite material , thermodynamics , materials science , geometry , physics , polymer , mathematics
It is shown that supermolecules with a tetrahedral symmetry and appropriate side‐chains exhibit liquid‐crystalline phase behaviour. The use of an optimised hydrosylation reaction allows for the synthesis of materials that have four mesogenic groups attached to a siloxane core, where the conformation and the configuration are unambiguous. The materials show low glass transition temperatures and, depending on the spacer length, complex liquid‐crystalline morphologies.