J4 ›› 2013, Vol. 30 ›› Issue (5): 520-523.

• 光谱 • 上一篇    下一篇

紫外光照下偶氮香蕉型液晶的光吸收特性研究

陈兰莉 石明吉 于家辉   

  1. 南阳理工学院电子与电气工程学院
  • 收稿日期:2012-11-30 修回日期:2013-04-07 出版日期:2013-09-28 发布日期:2013-09-17
  • 通讯作者: 陈兰莉(1972-),女,河南人,副教授,硕士,从事光电材料及其物性研究。 E-mail:chlanli@126.com
  • 基金资助:
    河南省基础与前沿基础研究项目(122300410205),河南省青年骨干教师资助计划 (2008755009),河南省教育厅科技攻关计划项目(12B430017),南阳市科技攻关项目(2010GG023)

UV absorption characteristics of banana-shaped liquid crystal containing azobenzene

CHEN Lan-li, SHI Mng-ji, YU Jia-hui   

  1. Department of Electrical and Electronics Engineering, Nanyang Institute of Technology, Nanyang 473006
  • Received:2012-11-30 Revised:2013-04-07 Published:2013-09-28 Online:2013-09-17

摘要: 借助紫外可见光谱仪观测和电子结构计算,研究了紫外光照对偶氮香蕉型液晶电子结构和光吸收特性的影响。吸收光谱显示:这种液晶的两个光学吸收峰分别位于360nm和275 nm。电子结构计算表明:这两个光学吸收主要来自于液晶中含偶氮官能团的电子跃迁。结果表明:365nm光子可将液晶中的氮氮双键打断,从而导致其在360nm处的吸收迅速降低,同时使275 nm处的吸收相应增加。

关键词: 液晶, 偶氮化合物, 光照, 光致离解

Abstract: The effect of ultraviolet photoirradiation on the azo-bent-core liquid crystal electronic structure and the optical properties was studied by ultraviolet-visible spectrophotometry observation and electronic structure calculation. The optical absorption spectrum showed that two optical absorption peaks appeared at about 360 nm and 275 nm which originated from electronic transitions of azo-chromophores indicated by electronic calculation. The result showed that nitrogen double bonds in the azo-containing liquid crystal could be broken when it is exposed to 365 nm irradiation which caused the absorption decreasing rapidly at 360nm and increasing accordingly at 275nm, and that indicated the occurring of photo-dissociation.

Key words: liquid crystal, azobenzene complex, photoirradiation, photo-dissociation.

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