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.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
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
