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首页> 外文期刊>Advanced Functional Materials >Unusually Fast Optically Induced Birefringence in Polyoxetanes Bearing 4-(N, N-Diphenyl) amino-4'-nitroazobenzene
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Unusually Fast Optically Induced Birefringence in Polyoxetanes Bearing 4-(N, N-Diphenyl) amino-4'-nitroazobenzene

机译：带有4-（N，N-二苯基）氨基-4'-硝基偶氮苯的聚氧杂环丁烷中的异常快速光学诱导双折射

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摘要

Two new polyoxetane polymers bearing azobenzene-type chromophore pendants were prepared, and their photoinduced molecular orientation and relaxation were studied. The two polymers differ in the mode of attachment of the chromophores, which are either laterally (Pox 1) or perpendicularly (Pox 2) bound to the polymer backbone. The two polymers reveal unusually fast (～2 s to saturation at 0.4 /cm~2) photoinduced reorientation of chromophores and decay behavior at room tem- perature. Side-on attachment of the chromophores (pox 1) results in a significantly faster response to polarized light and higher maximum brirefringence than end-on attachment. The kinetics of photoinduced orientation and relaxation decay were quantita- tively analyzed and the results are discussed in relation to the structures of the polymers.
机译：制备了两种新的带有偶氮苯型生色团侧基的聚氧杂环丁烷聚合物，并研究了它们的光诱导分子取向和弛豫。两种聚合物的生色团附着方式不同，生色团在侧面（Pox 1）或垂直（Pox 2）结合到聚合物骨架上。两种聚合物显示出异常快的速度（在0.4 / cm〜2时饱和至约2 s）在室温下光致发色团的重新定向和衰减行为。生色团（痘1）的侧向连接导致的偏振光响应比端向连接的响应快得多，并且最大Brirefringence更高。定量分析了光诱导取向和弛豫衰减的动力学，并讨论了与聚合物结构有关的结果。

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