化学学报 ›› 2000, Vol. 58 ›› Issue (2): 184-188. 上一篇    下一篇

研究论文

对称二苯乙烯衍生物非共振三阶非线性光学性质理论研究

刘春玲;查子忠;王骐;封继康;任爱民;孙家钟;苏忠民   

  1. 哈尔滨工业大学光电子技术研究所可调谐激光技术国家重点实验;室;吉林大学 理论化学研究所理论化学计算国家重点实验室;东北师范大学化学系功能材料化学 研究所
  • 发布日期:2000-02-15

Theoretical studies on non-resonant third-order nonlinear opticall properties of symmetrical stilbene derivatives

Liu Chunling;Cha Zizhong;Wang Qi;Feng Jikang;Ren Aimin;Sun Jiazhong;Su Zhongmin   

  • Published:2000-02-15

采用PM3,INDO/CI理论方法,系统研究了对称二苯乙烯系列衍生物的几何构型及电子光谱,计算结果与实验值基本吻合。在此基础上用完全态求和公式计算了分子的非共振三阶非线性光学系数,并从微观上探讨了不同分子结构的电子离域作用对材料三阶非线性光学性质的影响。

关键词: 苯乙烯P, 非线性材料, 光学性质, 电子性质, 微分重叠间忽略近似, 几何异构

The geometry and UV-vis spectra of symmetrical stilbene derivatives are systematically studied by PM3 and INDO/CI methods. The calculated results are basically consistent with the experimental values. Furthermore, the non-resonant third-order nonlinear optical susceptibilities of molecules are calculated according to the sum- over-states (SOS) expression. The relationship between the structures and properties has been explained micromechanically by electronic delocalization effects.

Key words: STYRENE P, NON-LINEAR MATERIALS, OPTICAL PROPERTIES, INTERMEDIATE NEGLECT OF DIFFERENTIAL OVERLAP APPROXIMATION (IND, GEOMETRICAL ISOMERISM

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