化学学报 ›› 1996, Vol. 54 ›› Issue (10): 955-960. 上一篇    下一篇

研究论文

聚炔体系H~2N-(C≡C)~n-NO~2(n=2~10)非线性光学性质的从头算法与半经验方法的比较研究

李泽荣;杨明晖;杨捷;田安民;鄢国森   

  1. 四川联合大学化学系
  • 发布日期:1996-10-15

Comparison of the nonlinear optical properties for polyyne H~2N-(C≡C)~n-NO~2(n=2~10) by Ab initio and semiempirical method

LI ZERONG;YANG MINGHUI;YANG JIE;TIAN ANMIN;YAN GUOSEN   

  • Published:1996-10-15

对聚炔体系的非线性光学性质用从头算方法和半经验方法与有限场方法结合进行了计算并对这两种方法的结果进行了系统的比较。用最小二乘方法拟合得到了其非线性光学性质与聚合物链长的函数关系, 并通过外推得到了平均每个单孢非线性光学性质的极限值。

关键词: 从头计算法, 非线性光学活性, 半经验方法, 聚炔, 有限场

The nonlinear optical properties for polyyne have been calculated by ab initio method and semiempirical method coupled wih the finite-field method. A systematic comparison between the results has been carried out. The functional relations between the nonlinear optical properties and the chain length have been obtained by the least squares minimization and the limit values of the nonlinear optical properties per unit cell have also been obtained by extrapolation.

Key words: AB INITIO CALCULATION, CUPRENE

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