期刊
POLYMER
卷 48, 期 22, 页码 6481-6490出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2007.09.011
关键词
carbazole; conjugated polymer; hyperbranched polymer
Carbazole-based novel hyperbranched conjugated polymers linked with triphenylamine and benzene moieties were synthesized by Sonogashira coupling polycondensation of N-octadecyl- and N-octyl-3,6-diethynylcarbazoles with tris(4-iodophenyl)amine and 1,3,5-tribromobenzene. Solvent-soluble polymers with number-average molecular weights in the range of 3500-21,000 were obtained in 48-66% yields. The UV-vis absorption bands of the polymers were red-shifted compared to that of carbazole, indicating the extension of conjugation length. The polymers emitted blue-green fluorescence with high quantum yields up to 67% in CHCl3. Poly(1/3) containing triphenylamine units emits visible light and shows unique solvatochromism. The polymers were electrochemically redox-active. (C) 2007 Elsevier Ltd. All rights reserved.
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