溶剂化变色法测定有机分子β的若干问题  

Problems in Measurement of Organic Molecular β by the Solvatochromism

作　　者：朱培旺[1] 王传广[1] 王鹏[1] 叶成[1] 

机构地区：[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

出　　处：《物理化学学报》1998年第4期369-374,共6页Acta Physico-Chimica Sinica

基　　金：863计划和国家自然科学基金

摘　　要：In This paper some problems, which should be noticed in the measurements of organicmolecular first hyperpolarizability（β） by the solvatochromism , are discussed based on the resultsof the measurements for 11 compounds .The experiments indicate theat 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 suggestedin which l is the molecular length of the nonlinear optical active part and can be obtained fromvalues of bond lengths in literature, rv is the average spherical radius of used solvents.In This paper some problems, which should be noticed in the measurements of organicmolecular first hyperpolarizability（β） by the solvatochromism , are discussed based on the resultsof the measurements for 11 compounds .The experiments indicate theat 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 suggestedin which l is the molecular length of the nonlinear optical active part and can be obtained fromvalues of bond lengths in literature, rv is the average spherical radius of used solvents.

关 键 词：有机非线性光学 分子超极化率(β) 溶剂化变色法 

分 类 号：O621.22[理学—有机化学]