A rational synthesis of polyacrylates with discogenic side groups
作者:
N. BODEN,
R. J. BUSHBY,
Z. B. LU,
期刊:
Liquid Crystals
(Taylor Available online 1998)
卷期:
Volume 25,
issue 1
页码: 47-58
ISSN:0267-8292
年代: 1998
DOI:10.1080/026782998206489
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The ferric chloride mediated oxidative coupling of 3,3,4,4-tetrahexyloxybiphenyl with 2-hexyloxyanisole followed by demethylation gave 3,6,7,10,11-pentahexyloxy-2-hydroxyor triphenylene. Reaction with tert -butyldimethylsilyl-protected 6-bromohexanol, removal of the protecting group, and condensation with acryloyl chloride methacryloyl chloride gave acrylate and methacrylate monomers with hexamethylene 'spacers'. Alternatively, reaction of 3,6,7,10,11-pentahexyloxy-2-hydroxytriphenylene with 2-(2-chloroethoxy)ethanol followed by acryloyl chloride or methacryloyl chloride gave acrylate and methacrylate monomers with diethylenoxy 'spacers'. Both of the poly(acrylate) homopolymers and the poly(methacrylate) homopolymer with the diethylenoxy 'spacer' gave columnar liquid crystal phases. This is contrary to the current perception that the methacrylate polymer backbone is too inflexible to be incorporated in columnar phases.
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