Structure-Property Relationships and Nonlinear Optical Effects in Donor-Substituted Dicyanopyrazine-Derived Push-Pull Chromophores with Enlarged and Varied π-Linkers
作者:Filip Bureš、Hana Čermáková、Jiří Kulhánek、Miroslav Ludwig、Wojciech Kuznik、Iwan V. Kityk、Tomáš Mikysek、Aleš Růžička
DOI:10.1002/ejoc.201101226
日期:2012.1
hyperpolarizability values enabled structure–property studies; these revealed some important structural features that affected the efficiency of intramolecular charge-transfer and nonlinear optical properties in this class ofheterocyclic push–pull chromophores. The charge-transfer transition was most significantly affected by structuralfeatures such as π-linker length, chromophore planarity, and the number
制备和研究了 13 个新的、稳定的推拉系统,其特征是二甲氨基和吡嗪-2,3-二甲腈部分分别作为供体和受体,以及系统扩展和变化的 π-接头。对测得的 UV/Vis 光谱、电化学数据(循环伏安法、旋转盘伏安法和极谱法)、X 射线数据以及实验确定和计算的超极化值的评估使结构-性质研究成为可能;这些揭示了一些重要的结构特征,这些特征影响了这类杂环推挽发色团的分子内电荷转移效率和非线性光学特性。电荷转移转变受结构特征的影响最显着,例如 π-接头长度、发色团平面度和 1 的数量,