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360 nm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:π→π*和π→σ*.结果表明:365 nm光子可将液晶中的氮氮双键打断,从而导致其在360 nm处的吸收迅速降低,同时使275 nm处的吸收相应增加.
参考文献
| [1] | Chen Lanli,Zhang Dan.Photochemical properties of bent-core liquid crystal containing azobenzene[J].Chinese Journal of Quantum Electronics(量子电子学报),2011,28(5):622-628 (in Chinese). |
| [2] | Huang Yuanming,Chen Lanli,Zhou Fufang,et al.New Trends in Fluid Mechanics Research[M].Beijing:Tsinghua University Press & Springer,2007:61-65. |
| [3] | Chen Lanli,Tang Zhongke.Electronic structure and electron transition of banana-shaped liquid crystals[J].Chinese Journal of Liquid Crystals and Displays(液晶与显示),2009,24(4):478-481(in Chinese). |
| [4] | Prasad V,Kang S W,Kumar S.Novel examples of achiral bent-core azo compounds exhibiting B1 and anticlinicantiferroelectric B2 mesophases[J].J.Mater.Chem.,2003,13:1259-1264. |
| [5] | Wang Pei,Ming Hai,Liang Zhongcheng,et al.Photoinduced birefringence and optical storage in azobenzene side-chain polymer liquid crystal film[J].Chinese Journal of Quantum Electronics(量子电子学报),2002,19(4):358-362 (in Chinese). |
| [6] | Luo Duanbin,She Weilong,Wu Shuizhu,et al.Study of all optical switching effect of polymer films containing azo-dye in core-shell structure[J].Chinese Journal of Lasers(中国激光),2005,32(12):1636-1640 (in Chinese). |
| [7] | Wei Xiongxiong,Wei Nina,Cao Yahong,et al.Research and application of azo liquid crystals polymers[J].Chemical Research and Application(化学研究与应用),2012,24(2):161-167(in Chinese). |
| [8] | Budyka M F,Kantor M M.Thermolysis of azobenzene[J].Russian Chemical Bulletin,1993,42(9):1495-1497. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%