| 含偶氮苯弯曲液晶的光化学性质研究 |
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| 引用本文： | 陈兰莉,张丹. 含偶氮苯弯曲液晶的光化学性质研究[J]. 量子电子学报, 2011, 28(5): 622-628. DOI: 10.3969/j.issn.1007-5461.2011.05.018 |
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| 作者姓名： | 陈兰莉 张丹 |
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| 作者单位： | 南阳理工学院电子与电气工程系, 河南 南阳 473004 |
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| 基金项目： | 河南省基础与前沿基础研究项目(0723004 10310,092300410182); 河南省青年骨干教师资助计划(2008755009) |
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| 摘 要： | 研究了紫外光照和温度对偶氮弯曲液晶极化电流的影响。在365 nm紫外光照下，这种偶氮化合物的极化强度随紫外光照时间增加而变化直至为零；当温度从150oC 升高到 175oC时，弯曲液晶的极化电流随温度线性降低，用Landau-de Gennes理论解释了这一现象。其极化情况随紫外光照和温度而变化的实验规律表明：在紫外光照下偶氮弯曲液晶发生了光致异构化、光裂解和热裂解作用。
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| 关 键 词： | 材料 弯曲液晶 光照 自发极化 |
| 收稿时间： | 2010-07-23 |
| 修稿时间： | 2010-09-22 |
Photochemical properties of bent-core liquid crystal containing azobenzene |
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| CHEN Lan-li,ZHANG Dan. Photochemical properties of bent-core liquid crystal containing azobenzene[J]. Chinese Journal of Quantum Electronics, 2011, 28(5): 622-628. DOI: 10.3969/j.issn.1007-5461.2011.05.018 |
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| Authors: | CHEN Lan-li ZHANG Dan |
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| Affiliation: | Department of Electrical and Electronic Engineering, Nanyang Institute of Technology, Nanyang 473004, China |
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| Abstract: | By triangular wave method,the effects of ultraviolet irradiation and temperature on the polarization of a bent-core liquid crystal containing azobenzene were studied.Under the 365 nm ultraviolet irradiation,the switching currents were observed to change with the time of ultraviolet irradiation until they diminished.As the temperature increases from 150 ℃ to 175 ℃,the switching currents of the bent-core liquid crystal were observed to decrease linearly with temperature.The unusual temperaturedependent polarization was discussed in the light of Landau-de Gennes theory.The results demonstrated that photoisomerization,photolysis and thermolysis may take place in the bent-core liquid crystal containing azobenzene. |
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| Keywords: | materials bent-core liquid crystal photoirradiation spontaneous polarization |
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