GLASS-FORMING DISCOTIC LIQUID-CRYSTALLINE OLIGOMERS

被引:59
作者
BODEN, N [1 ]
BUSHBY, RJ [1 ]
CAMMIDGE, AN [1 ]
MARTIN, PS [1 ]
机构
[1] UNIV LEEDS,SOMS CTR,LEEDS LS2 9JT,W YORKSHIRE,ENGLAND
关键词
D O I
10.1039/jm9950501857
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Isomerically pure dimers and trimers containing, two and three triphenylene hexaether mesogenic units, respectively, have been prepared, The key step of the synthesis was an oxidative coupling of a 1,2-dialkoxybenzene and a 3,4,3',4'-tetraalkoxybiphenyl to give an unsymmetrically substituted triphenylene. The mesophase behaviour of these liquid crystals shows that there is surprisingly little difference between the clearing temperatures of the equivalent monomer, 'dimer','trimer' and polymer and that, like the polymer, these new oligomers supercool into ordered glassy films.
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收藏
页码:1857 / 1860
页数:4
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