物理化学学报 >> 1998, Vol. 14 >> Issue (04): 369-374.doi: 10.3866/PKU.WHXB19980417

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溶剂化变色法测定有机分子β的若干问题

朱培旺, 王传广, 王鹏, 叶成   

  1. 中国科学院化学研究所，中国科学院有机固体开放实验室，北京 100080
  • 收稿日期:1997-07-02 修回日期:1997-11-19 发布日期:1998-04-15
  • 通讯作者:

Problems in Measurement of Organic Molecular β by the Solvatochromism

Zhu Pei-Wang, Wang Chuan-Guang, Wang Peng, Ye Cheng   

  1. Organic Solid Laboratory,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080
  • Received:1997-07-02 Revised:1997-11-19 Published:1998-04-15
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关键词: 有机非线性光学, 分子超级化率(β), 溶剂化变色法

Abstract:

In This paper some problems, which should be noticed in the measurements of organic molecular first hyperpolarizability（β） by the solvatochromism , are discussed based on the results of the measurements for 11 compounds .The experiments indicate the at the selection of solvent used is the basis of the method to fit for use. The determination of the parameter a, which is the radius of a spherical cavity occupied by the molecules in the solutions, is the key to decide the reasonableness of the obtained results and the formula for a=1/2(l'+rv),has been suggested in which l is the molecular length of the nonlinear optical active part and can be obtained from values of bond lengths in literature, rv is the average spherical radius of used solvents.

Key words: Organic nonlinear optics, Molecular first hyperpolarizability(β), Solvatochromism