Mesomorphic and luminescent properties of disubstituted polyacetylenes bearing biphenyl pendants
作者： Jacky W.Y Lam , Chi Kong Law , Yuping Dong , Jiannong Wang , Weikun Ge
DOI: 10.1016/S0925-3467(02)00157-X
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摘要: Abstract Liquid crystalline and light emitting properties of two new disubstituted polyacetylenes bearing biphenyl pendants (–{(R)CC[(CH2)4OCO-Biph-OC7H15]}n–, RCH3 (1), C6H5 (2), Biph=4,4′-biphenylyl) were investigated. Whereas 1 formed enantiotropic nematic phase, 2 was non-mesomorphic. Upon photoexcitation, the THF solutions emitted strong UV blue 369 460 nm, respectively, whose quantum efficiencies higher than that poly(1-phenyl-1-octyne), a highly luminescent polyacetylene.
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