高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (2): 329.

• 研究论文 • 上一篇    下一篇

光响应性偶氮聚电解质自组装研究

庹新林, 陈峥, 吴立峰, 王晓工, 刘德山   

  1. 清华大学材料科学与工程研究院, 化工系高分子研究所, 北京 100084
  • 收稿日期:1999-05-29 出版日期:2001-02-24 发布日期:2001-02-24
  • 通讯作者: 王晓工(1955年出生),男,博士,教授,博士生导师,从事功能高分子研究.
  • 基金资助:

    国家自然科学基金杰出青年基金(批准号:59925309)资助

Self-assembly of Photo-responsive Azo Polyelectrolytes

TUO Xin-Lin, CHEN Zheng, WU Li-Feng, WANG Xiao-Gong, LIU De-Shan   

  1. Institute of Polymer Research, Department of Chemical Engineering, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
  • Received:1999-05-29 Online:2001-02-24 Published:2001-02-24

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被引次数

32

摘要： 将3种侧链带有不同偶氮生色团的聚电解质,用逐层浸渍的方法使其组装成多层膜.利用原子力显微镜(AFM)研究了自组装膜的表面形貌以及随着组装层数增加的变化.详细研究了在紫外光的照射下,薄膜内偶氮生色团由反式到顺式构型的光响应转变,以及在暗室中由顺式回复到反式构型的回复特性.与自组装膜的光响应性和相应的旋涂膜进行比较发现,其中的PNAPE/PDAC自组装膜没有明显的光色效应,而PEAPE/PDAC,PPAPE/PDAC具有明显的光色效应.在暗室中,随生色团的结构不同和在不同的凝集态中,由顺式回复到反式构型的速率明显不同.

关键词: 偶氮聚电解质, 自组装膜, 顺反异构, 光响应性

Abstract: Three azo polyelectrolytes were successfully fabricated into self-assembled multilayers through a layer-by-layer dipping technique. The surface morphology and its variation with the bilayer growth were investigated with atomic force microscopy(AFM). Thecis-trans isomerization of the self-assembled thin films was studied with UV-Vis spectroscopy and compared with the spin-coated films. PEAPE/PDACand PPAPE/PDACmultilayers show significant photochromic effect upon UVlight irradiation. In dark condition, the rates ofcis-to-trans isomerization depend on the chromophore structure. For polyelectrolytes containing the same chromophores, the azo dyes in self-assembled multilayer recover much faster fromcis totrans isomer than those in spin-coated films.

Key words: Azo polyelectrolytes, Self-assembled multilayer, Trans-cis isomerization, Photo-responsive

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