Chirality in Poly(phenylene-alt-bithiophene)s: A Comprehensive Study of Their Behavior in Film and Nonsolvents
Chirality in Poly(phenylene-alt-bithiophene)s: A Comprehensive Study of Their Behavior in Film and Nonsolvents
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DOI：
10.1021/ma071559n
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发表时间：
2007-10
期刊：
影响因子：
5.5
通讯作者：
G. Koeckelberghs;M. Vangheluwe;A. Persoons;T. Verbiest
中科院分区：
文献类型：
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作者：
G. Koeckelberghs;M. Vangheluwe;A. Persoons;T. Verbiest
合成了新型手性交替共聚物2，5-二烷氧基苯和3，3 ′-二烷氧基-2，2 ′-联噻吩，并研究了它们的手性光学性质。该聚合物通过Stille偶联反应制备，在溶液和薄膜中均显示出高的共轭长度。荧光和紫外-维斯光谱表明，聚合物在溶液中是刚性的，高度共轭的聚合物链。在非溶剂混合物中，聚合物聚集，并且如果采用手性取代基，则观察到超分子手性。在退火膜中，观察到非常大的科顿效应。
New chiral, alternating copolymers of 2,5-dialkoxybenzenes and 3,3‘-dialkoxy-2,2‘-bithiophenes were prepared and their (chir)optical properties were studied. The polymers were prepared by a Stille coupling reaction and show high conjugation lengths in both solution and films. Fluorescence and UV−vis spectroscopy indicate that the polymers are present as rigid, highly conjugated polymer strands in solution. In a nonsolvent mixture, the polymers aggregate and, if chiral substituents are employed, supramolecular chirality is observed. In annealed films, very large Cotton effects are observed.