【摘要】 用气相法生长成足够大的N salicylideneaniline(SA)单晶 ,并研究SA单晶对不同偏振探测光的光致变色性质 .在不同温度和不同偏振的情况下 ,测试了光致着色和光致褪色过程中光密度变化的时间依存性质 ,并通过计算获得SA单晶用不同偏振探测光测得的激活能 .并通过理论计算和实验结果发现 ,在 2 0 0K温度用紫外光照射样品时 ,生成的酮分子中约有 6 0 %是trans酮构型和约 40 %的cis酮构型更多还原

【Abstract】 We have grown clean N\|salicylideneaniline (SA) single crystals large enough in size by physical vapour depositaion. The photochromism of the SA single is studied by probe light at different optical polarizations At different temperatures and different polarizations,we measured the time dependence of the change of optical density in the colored crystal in the forward and backward reactions.The activation energies of the single crystal are obtained in different optical polarizations.Based on theoretical calculations,the structure configurations of the SA molecules in the colored keto form are analyzed.When an ultraviolet (UV) light is irradiated on the sample at 200 K,about 60% of the ketone form molecules are found to be in the trans\|configuration and about 40% of them in the cis\|configuration.更多还原