The synthesis of a series of push-pull systems [donor (D)–acceptor (A)], associating the 1,3-dithiol-2-ylidene moiety (D) to various (A) fragments through polyolefinic linkages of various lengths, is described. Design optimization of these NLO phores isvia systematic determination of the molecular first hyperpolarizabilities beta; by the EFISH method. Selected compounds of this series, displaying the highest beta; values, are then chemically functionalized in order to promote their covalent grafting to polymeric backbones.
本文介绍了一系列推拉系统[供体(D)-受体(A)]的合成过程,这些系统通过不同长度的聚烯烃连接将 1,3-二
硫醇-2-亚基分子(D)与各种(A)片段连接起来。这些 NLO
磷光体的设计优化是通过 EFISH 方法系统地确定分子第一超极化率 beta。然后对该系列中显示出最高 beta 值的部分化合物进行
化学官能化处理,以促进它们与聚合物骨架的共价接枝。