摘要
近年来一些具有π电子共轭的有机化合物引起了人们广泛的兴趣。这是因其中有的化合物具有较大的二阶分子极化率,因而有可能用作非线性光学材料,获得二次谐波(SHG)以及在电-光调制技术中得到应用。测定分子的二阶极化率一般的方法是通过所谓电场诱导二阶谐波测定,即EFISH法完成,但对一般的化学实验室要建该项设备并非易事,为此近年来对发展简易的测定方法受到重视。利用溶致变色法来测定上述数据是化学实验室易于完成的一种方法。其优点是理论基本健全。
Second-order polarizabilities of 1,3-diphenl-2-pyrazoline and 1-(4'-nitrophenyl)-3-phenyl -2-pyrazoline have been measured by a solvarochromic method. The results show that electro-withdrawing substituent (such as nitro group) at the phenyl group linked with the C-3 atom gives rise to large second order polarizabiliy. It is accordant with the results of quantum mechanics calculation. The results also show that the studied substituted pyrazolines can be applied as a kind of high efficiency second order harmonic generation (SHG) materials.
出处
《感光科学与光化学》
CSCD
1992年第2期174-179,共6页
Photographic Science and Photochemistry
关键词
非线性光学
吡唑啉
溶致变色
nonlinear optical materials, second harmonic generation, pyrazoline compounds, solvatochromism
