Photoinduced formation of microscopic ordering and macroscopic pattern in spiropyran-containing polyacrylate-tetraoctylammonium bromide films
Photoinduced formation of microscopic ordering and macroscopic pattern in spiropyran-containing polyacrylate-tetraoctylammonium bromide films
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DOI：
10.1021/ma070318c
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发表时间：
2007-06
期刊：
影响因子：
5.5
通讯作者：
Shuizhu Wu;Jiarong Lu;Fang Zeng;Yanan Chen;Zhen Tong
中科院分区：
文献类型：
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作者：
Shuizhu Wu;Jiarong Lu;Fang Zeng;Yanan Chen;Zhen Tong
在这项研究中，光异构化聚丙烯酸酯含有螺吡喃部分的合成。利用光诱导的螺吡喃结构转变，在含螺吡喃的聚丙烯酸酯（SPPA）和四辛基溴化铵（托亚布）组成的聚合物膜中形成了光诱导的微观有序结构，并最终形成宏观图案.由此获得的图案由同心环组成，该同心环交替地由宏观凸脊和凹谷组成，其中前者是巨大的相，后者是有序的介晶相。结果发现，开环质子化mercury（MC）形式的螺吡喃部分，这是由紫外线照射触发，是至关重要的介晶结构和宏观图案的形成，这种聚合物表面活性剂系统。可能是MC形式和托亚布之间的相互作用导致了聚合物-TOA中微观有序和宏观图案的形成。
In this study, photoisomerizable polyacrylate containing spiropyran moieties was synthesized. By taking advantage of the photoinduced structural transformations of the spiropyran moieties, photoinduced microscopic ordering and eventually macroscopic patterns were formed in the polymer films consisting of spiropyran-containing polyacrylate (SPPA) and tetraoctylammonium bromide (TOAB). The patterns thus obtained are composed of concentric rings, which alternatively consist of macroscopic convex ridges and concave valleys, with the former being amphormous phases and the latter being ordered mesomorphous ones. It was found that the open-ring protonated merocyanine (MC) form of the spiropyran moieties, which is triggered by UV illumination, was crucial to the formation of mesomorphous structure and macroscopic patterns for this polymer−surfactant system. It is possible that the interaction between the MC form and TOAB leads to the formation of the microscopic ordering and macroscopic pattern in the polymer−TOA...