高等学校化学学报

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (2): 372.

• 研究论文 • 上一篇    下一篇

侧链含偶氮苯发色团的聚酰亚胺薄膜的制备及其三阶非线性光学和光存储性能的研究

孙建平, 吴洪才, 李宝铭, 应祖金   

  1. 西安交通大学电信学院光电技术与太阳能研究所, 西安 710049
  • 收稿日期:2002-11-06 出版日期:2004-02-24 发布日期:2004-02-24
  • 通讯作者: 吴洪才(1944年出生),男,教授,博士生导师,主要从事光电功能高分子以及非线性光学和光信息存储等研究.E-mail;wu44@mail.xjtu.edu.cn E-mail:wu44@mail.xjtu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号;10075038)资助

Preparation, Third-order Nonlinear Optical Property and Optical Information Storage of Polyimide Attached with Azobenzene Chromophore Side-chain

SUN Jian-Ping, WU Hong-Cai, LI Bao-Ming, YING Zu-Jin   

  1. Institute of Photoelectric Technology and Solar Energy, School of Electronics and Information Engineering, Xian Jiaotong University, Xian 710049, China
  • Received:2002-11-06 Online:2004-02-24 Published:2004-02-24

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被引次数

90

摘要： 将4,4'-二氨基三苯甲烷(DTM)单体与均苯四甲酸酐(PMDA)进行缩聚反应,再与对-硝基苯基重氮氟硼酸盐进行重氮偶合反应,然后经酰亚胺化合成了侧链含偶氮苯发色团的聚酰亚胺非线性光学材料(NLOPI).通过红外光谱对产物进行了结构表征.对产物的紫外-可见吸收光谱研究发现,在330和490nm处出现侧链偶氮苯发色团的特征吸收.通过简并四波混频方法(DFWM)测定侧链含偶氮苯发色团的聚酰亚胺薄膜的三阶非线性极化率χ(3)=4.58×10-18m2/W.在DFWM中,前向泵浦光If和探测光Ip是主要的写入光,而后向泵浦光Ib是主要的读出光.证实了光致偶氮分子的顺反异构能够导致光信息存储的特性.

关键词: 偶氮苯发色团, 聚酰亚胺, 三阶非线性光学, 三阶非线性极化率, 光信息存储

Abstract: Using aniline and benzaldehyde as raw materials, p,p'-diaminotriphenylmethane(DTM) was synthesized. Co-condensation type poly(amic acid) was prepared by using p,p'-diaminotriphenylmethane as the co-diamine monomer and pyromellitic dianhydride(PMDA) as the the dianhydride monomer. And then the nonlinear optical polyimide(NLOPI) attached with azobenzene chromophore side-chain was synthesized by diazo coupling reaction of 4-nitrobenzenediazonium tetrafluoroborate to poly(amic acid) in 1-methyl-2-pyrrolidone(NMP) and imidization reaction at 250 ℃. The designed chemical structure of production can be proved in the infrared spectrum and ultraviolet-visible absorption spectrum. The NLOPI exhibits UV-Vis absorption of the azobenzene chromophore at the wavelength of about 330 nm and 490 nm. The third-order nonlinear optical property of NLOPI was studied by degenerate four-wave mixing(DFWM). Third-order nonlinear susceptibility of NLOPI is 3.28×10-10 esu(4.58×10-18 m2/W). It is indicated that NLOPI has strong optical information storage through DFWM. Forward pumping light(If) and detecting light(Ip) are prime writing light, however backward pumping light(Ib) is principal reading light. It is proved that optical information storage can be caused by photo-induced trans-cis isomerization of azobenzene.

Key words: Azobenzene chromophore, Polyimide, Third-order nonlinear optics, Third-order nonlinear susceptibility, Optical information storage

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