Optical second order nonlinearities in new chromophores obtained by selective mono-reduction of dinitro precursors
Optical second order nonlinearities in new chromophores obtained by selective mono-reduction of dinitro precursors
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DOI：
10.1016/j.optmat.2004.02.011
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发表时间：
2004-10-01
影响因子：
3.9
通讯作者：
Tuzi, A
中科院分区：
文献类型：
--
作者：
Cariati, F;Caruso, U;Tuzi, A
合成并表征了三种新的具有二阶非线性光学应用潜力的推挽生色团，并通过EFISH方法测定了分子的二阶非线性光学性质。发色团含有与芴、芪或1，3，4-硫杂-重氮基团偶联的苯基-偶氮单元，并且是OH-官能化的，以促使容易地共价插入聚合物链中。选择性还原起始前体中两个化学等价的硝基中的一个是提供发色团的合成途径的关键步骤。它们具有良好的化学和热稳定性。本文还报道了芴酮衍生发色团的X射线结构测定。(C)2004 Elsevier B. V.保留所有权利。
Three new push-pull chromophores of potential interest in second order nonlinear optical applications were synthesized and characterized, also by EFISH determination of molecular second order NLO properties. The chromophores contain a phenyl-azo unit coupled with fluorenonic, stilbenic or 1,3,4-thia-diazolic groups and are OH-functionalized to prompt easy covalent insertion in polymer chains. The selective reduction of only one of the two chemically equivalent nitro groups in the starting precursors is the key step of the synthetic pathway affording the chromophores. These show good chemical and thermal stability. The X-ray structural determination of the fluorenone derived chromophore is also reported. (C) 2004 Elsevier B.V. All rights reserved.