物理化学学报 >> 2000, Vol. 16 >> Issue (05): 422 -425 .doi: 10.3866/PKU.WHXB20000509

研究论文 上一篇    下一篇

几种查耳酮的二阶非线性光学性质解析

赵波, 张道, 曹阳, 陈文建, 孙真荣, 王祖庚   

  1. 南京师范大学化学系,南京 210097;苏州大学化学系,苏州 215006|华东师范大学量子广学实验室,上海 200062
  • 收稿日期:1999-09-07 修回日期:1999-11-02 发布日期:2000-05-15
  • 通讯作者: 赵波 E-mail:bozhao@pine.njnu.edu.cn

Analysis of the Second-order Nonlinear Optical Properties of some Chalcones

Zhao Bo, Zhang Dao, Cao Yang, Chen Wen-Jian, Sun Zhen-Rong, Wang Zu-Geng   

  1. Department of Chemistry,Nanjing Normal University,Nanjing 210097;Department of Chemistry,Suzhou University,Suzhou 215006|Laboratory for Quantum Optics,East China Normal University,Shanghai 200062
  • Received:1999-09-07 Revised:1999-11-02 Published:2000-05-15
  • Contact: Zhao Bo E-mail:bozhao@pine.njnu.edu.cn

摘要:

合成了一系列的查耳酮衍生物 ,系统地测量了其SHG(二次谐波产生 )效率和截止吸收波长 ,并用CNDO/S-CI方法计算了它们的二阶非线性光学系数 β值 .通过对这些化合物性质的分析发现 :( 1)取代基Br不仅能有效地增强微观非线性效应而且还能有效地增强材料的宏观非线性效应 ;( 2 )取代基Br有利于改善材料的透光性能和热稳定性 ;( 3)分子在晶体中的空间取向是影响材料宏观非线性的另一个重要因素.

关键词: 查耳酮衍生物, 非线性光学系数, 透光性能, 晶体结构

Abstract:

A series of chalcone derivatives, were synthesized and a systematic measurement was carried out on their second harmonic generation (SHG) and the cutoff wavelengths. Their second-order nonlinear optical polarizabilities β were also calculated by CNDO/SCI method. The properties of these compounds were analyzed and it was found that (1) substituted bromo group in chalcome molecule could improve greatly the microscopic and macroscopic nonlinear optical properties;(2) bromo group is favorable for high transparency and thermal stability of the optical materials. So it can be said that bromo group is an excellent candidate group for designing effective organic nonlinear optical materials. Furthermore, the nonlinear optical properties can also be affected by the crystal structure. The high quality single crystals of BMC were grown by method of solution growth.

Key words: Chalcone derivatives, Nonlinear optical polarizabilities, Transparency, Crystal structure