Unsymmetrical aryl disulfides with excellent transparency in the visible region for second order nonlinear optics
作者:Ramanathan Sudharsanam、Srinivasan Chandrasekaran、Puspendu Kumar Das
DOI:10.1039/b204034d
日期:2002.9.26
Several unsymmetrically substituted aromatic donor–acceptor disulfides have been synthesized and analysed for their second order nonlinear optical properties. These molecules exhibit moderately high first hyperpolarizability (β) with excellent transparency in the visible region. Most of the unsymmetrical disulfides have a cut-off wavelength below 420 nm. Calculations show that the molecules have an asymmetric charge distribution around the disulfide bond which is responsible for their high β values. These results provide motivation for the design and synthesis of nonlinear optical chromophores with multiple disulfide bonds for large second order nonlinearity and excellent visible transparency.
我们合成了几种不对称取代的芳香族供体-受体二硫化物,并分析了它们的二阶非线性光学特性。这些分子表现出中等程度的第一超极化率 (β),在可见光区域具有极佳的透明度。大多数非对称二硫化物的截止波长低于 420 纳米。计算表明,这些分子在二硫键周围具有不对称的电荷分布,这也是它们具有高 β 值的原因。这些结果为设计和合成具有多个二硫键的非线性光学发色团提供了动力,使其具有较大的二阶非线性和出色的可见光透明度。