Helical conjugated polymers by design
Helical conjugated polymers by design
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DOI：
10.1021/ma021250y
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发表时间：
2002-12-03
期刊：
影响因子：
5.5
通讯作者：
Leclerc, M
中科院分区：
文献类型：
--
作者：
Dubus, S;Marceau, V;Leclerc, M
一些交替的亚苯基-呋喃单元可以导致构象锁定的共轭聚合物。根据取代模式，可以合理地设计刚性棒状或螺旋状结构。通过添加手性侧链和圆二色性测量，证实了聚（1，4-（2，3-二烷氧基亚苯基）-alt-2，5-呋喃）中螺旋结构的存在。在良溶剂中，该聚合物表现出一些手性光学性质，其在不良溶剂中聚集时降低。相比之下，刚性棒状聚（1，4-（2，5-二-（S）-2-甲基丁氧基亚苯基）-alt-2，5-呋喃）仅在聚集时显示手性光学性质。
Some alternating phenylene-furan units can lead to conformationally locked conjugated polymers. Depending upon the substitution pattern, rigid-rod-like or helical structures can be rationally designed. The presence of helical structure in poly(1,4-(2,3-dialkoxyphenylene)-alt-2,5-furan)s has been demonstrated by adding chiral side chains and by performing circular dichroism measurements. In a good solvent, this polymer exhibits some chiroptical properties which decreases upon aggregation in poor solvents. In contrast, rigid-rod-like poly(1,4-(2,5-di-(S)-2-methylbutoxyphenylene)-alt-2,5-furan) only shows chiroptical properties upon aggregation.