温度诱导有机溶剂中K_2Cr_2O_7溶液圆二向色性增大的研究  

Temperature-induced Circular Dichroism Increasing of K_2Cr_2O_7 Dissolved in an Organic Solvent

作　　者：刘桂香[1] 鲁毅[1] 金香[1] 韩剑锋 

机构地区：[1]内蒙古包头师范学院物理系,内蒙古包头014030 [2]五二研究所,内蒙古包头014030

出　　处：《内蒙古大学学报（自然科学版）》2009年第4期403-407,共5页Journal of Inner Mongolia University：Natural Science Edition

基　　金：内蒙古自然科学基金资助项目(20080404MS0114);内蒙古自治区高等学校科学研究资助项目(NJzc08135)

摘　　要：根据圆二向色性原理,采用实验室搭建的控温测试系统,借助于量子场中关于吸收的密度矩阵微扰理论,对溶液吸光粒子数密度为1018个/mL的高浓度有机溶剂酒石酸钾中K2C r2O7的圆二向色性的温度特性进行实验测试和模拟分析.实验测试结果表明,在波长500 nm^660nm范围内,溶液的圆二向色性随温度的降低而增大.模拟曲线与实验曲线的一致性表明,实验依据的理论对研究分析圆二向色性的温度效应是有效的.理论模拟结果表明,低温下溶液中的粒子之间形成了对光有较强散射作用的因子.Based on the circular dichroism theory, using the testing system of a temperature regulating device built in laboratory and with the theories of density matrix perturbation and Debye in quantum field,the thermal effect on the circular dichroism of K2Cr2O7 dissolved in an organic solvent is researched,and the number of absorption particles is 101S/mL in the solution. The testing results show that its circular dichroism increases as temperature decreasing among the region of wavelength 500 nm-660 nm. The consistence of simulated curves and experimental curves indicates that the theories used are effective. The theoretical simulation results reveal that a stronger scattering factor is formed between a light and particles under low temperatures.

关 键 词：圆二向色性 温度 密度矩阵 微扰 

分 类 号：O436[机械工程—光学工程]