Four new multi-functionalized carbazole derivatives featuring phenanthroimidazole, N-phenylcarbazole and cyano-substituents are designed and synthesized. The dyes are characterized by photophysical, electrochemical and thermal properties and the dependency of auxiliary chromophores on the functional properties critically analyzed. The dyes showed tunable emission from violet to blue region depending on the chromophore attached to the carbazole core. The cyano-substituted dyes exhibited enhanced intramolecular charge transfer in optical properties as compared to N-phenylcarbazole substituted dyes. Consequently, cyano-substituted dyes displayed solvatochromism in emission and possess large Stokes shift. All the dyes showed remarkable thermal stability attributable to robust phenanthroimidazole and carbazole chromophores. The fluorescent sensory properties of all the dyes toward acid are also explored and found that the emission of cyano derivatives displayed blue shift due to protonation of phenanthroimidazole unit. Finally, the dyes are employed as dopant emitter in multilayer solution-processed organic light-emitting diode which displayed blue electroluminescence.

设计并合成了以菲并咪唑，N-苯基咔唑和氰基取代基为特征的四种新的多官能咔唑衍生物。染料的特征在于光物理，电化学和热性质，以及辅助生色团对严格分析的功能性质的依赖性。根据与咔唑核相连的生色团，染料显示出从紫色到蓝色区域的可调发射。与N-相比，氰基取代的染料在光学性质上表现出增强的分子内电荷转移。苯基咔唑取代的染料。因此，氰基取代的染料在发射中表现出溶剂化变色并且具有大的斯托克斯位移。所有染料均显示出显着的热稳定性，这归因于强大的菲并咪唑和咔唑发色团。还探索了所有染料对酸的荧光感官特性，发现氰基衍生物的发射由于菲并咪唑单元的质子化而显示出蓝移。最后，染料在多层溶液处理的有机发光二极管中用作掺杂剂发射体，该二极管显示出蓝色电致发光。