偶氮苯聚合物(PGMAA-20)膜光栅结构的分子取向机制

doi:10.7517/j.issn.1674-0475.2004.03.183

影像科学与光化学 ›› 2004, Vol. 22 ›› Issue (3): 183-189.DOI: 10.7517/j.issn.1674-0475.2004.03.183

偶氮苯聚合物(PGMAA-20)膜光栅结构的分子取向机制

牛永平¹, 张灵志¹, 苏育志¹, 梁兆熙¹, 陆伟², 佘卫龙²

1. 中山大学, 化学与化工学院高分子研究所, 广东, 广州, 510275;
2. 中山大学, 光电材料与技术国家重点实验室, 广东, 广州, 510275

收稿日期:2003-11-20 修回日期:2004-01-05 出版日期:2004-05-23 发布日期:2004-05-23
通讯作者: 梁兆熙,E-mail:ceslzx@zsu.edu.cn.
基金资助:
广东省自然科学基金项目(001249;980346).

Molecular Reorientation Mechanism of Gratings Structure in an Azobenzene Polymer (PGMAA-20) Film

NIU Yong-ping¹, ZHANG Ling-zhi¹, SU Yu-zhi¹, LIANG Zhao-xi¹, LU Wei², SHE Wei-long²

1. Institute of Polymer Science, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, Guangdong, P. R. China;
2. State Key Laboratory of Optoelectronic Materials and Tech nologies, Sun Yat-Sen Universisy, Guangzhou 510275, Guangdong, P.R.China

Received:2003-11-20 Revised:2004-01-05 Online:2004-05-23 Published:2004-05-23

摘要/Abstract

摘要： 设计合成及表征了一种含偶氮苯聚合物(PGMAA 20)材料.利用两束S偏振光作为泵浦光在PGMAA 20膜上刻写光栅并观察光栅的衍射信号;然后再用相衬显微镜直接观察偶氮苯薄膜上的光栅结构,并以分子取向机制为基础对光栅形成和消除过程提出了新解释,这种观点被实验观察结果进一步证实.

关键词: 偶氮苯聚合物, 光致异构, 光栅结构, 分子取向

Abstract: An azobenzene polymer (PGMAA-20) was synthesized and characterized.Photoinduced refractive index gratings were written in the azobenzene polymer films by using S+S configuration.After the gratings formed,the samples were investigated under a polarized optical phase contrast microscope.It has been found that the gratings are polarization sensitive.This kind of gratings can be kept in the material for a long time.A mode of molecular reorientation is used to explain the formation mechanism of these gratings and it is well consistent with our experimental results.

Key words: azobenzene polymer, photoinduced isomerization, gratings structure, molecular reorientations

中图分类号:

牛永平, 张灵志, 苏育志, 梁兆熙, 陆伟, 佘卫龙. 偶氮苯聚合物(PGMAA-20)膜光栅结构的分子取向机制[J]. 影像科学与光化学, 2004, 22(3): 183-189.

NIU Yong-ping, ZHANG Ling-zhi, SU Yu-zhi, LIANG Zhao-xi, LU Wei, SHE Wei-long. Molecular Reorientation Mechanism of Gratings Structure in an Azobenzene Polymer (PGMAA-20) Film[J]. Imaging Science and Photochemistry, 2004, 22(3): 183-189.

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偶氮苯聚合物(PGMAA-20)膜光栅结构的分子取向机制

Molecular Reorientation Mechanism of Gratings Structure in an Azobenzene Polymer (PGMAA-20) Film

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