Dicyanobenzene and dicyanopyrazine derived X-shaped charge-transfer chromophores: comparative and structure–property relationship study
作者:L. Dokládalová、F. Bureš、W. Kuznik、I. V. Kityk、A. Wojciechowski、T. Mikysek、N. Almonasy、M. Ramaiyan、Z. Padělková、J. Kulhánek、M. Ludwig
DOI:10.1039/c4ob00901k
日期:——
A series of novel X-shaped pushâpull compounds based on benzene-1,2-dicarbonitrile has been designed, synthesized and further investigated by X-ray analysis, electrochemistry, absorption and emission spectra, SHG experiment and quantum-chemical calculations. The obtained data were compared with those for isolobal 5,6-disubstituted pyrazine-2,3-dicarbonitriles. Structureâproperty relationships were elucidated. The extension, composition and planarization of the Ï-linker used as well as the electron-withdrawing ability of both dicyano-substituted acceptor units affect the linear and nonlinear properties of the target charge-transfer chromophores most significantly.
基于苯-1,2-二氰基化合物设计、合成了一系列新型的X形推-拉化合物,并通过X射线分析、电化学、吸收和发射光谱、SHG实验及量子化学计算进行了进一步研究。所获得的数据与等边的5,6-二取代吡嗪-2,3-二氰基化合物的数据进行了比较。阐明了结构-性质关系。所使用的π-连接体的延伸、组成和平面化,以及双氰取代的受体单元的电子吸引能力,对目标电荷转移色谱的线性和非线性性质产生了最显著的影响。