卤代二苯乙烯体系中卤-卤相互作用的调控及其对分子聚集态和发光特性的影响

Regulation of Halogen-Halogen interaction in Halogen substituted trans-stilbenes and its effect on aggregation structures and luminescence properties

卤素-卤素(X···X)相互作用是一类强的分子间相互作用,这种非共价键分子间的相互作用对有机π分子的聚集态结构和光电特性具有重要的影响.本文通过在反式二苯乙烯类化合物骨架上引入给电子基团甲硫基和调节卤素取代基的位置,实现了分子间卤素-卤素相互作用的可控构筑,并进一步研究了卤素-卤素相互作用对卤代反式二苯乙烯类分子聚集态和发光特性的影响.该实验结果为调控有机π分子聚集态结构,获得高性能有机光电材料提供了新思路.

Halogen-halogen(X···X) interaction is a kind of strong intermolecular interaction. This interaction has great impact on the aggregation structures and optoelectronic properties of organic π-conjugated molecules. However, it is still a great challenge to tune the X···X interactions among organic π-conjugated molecules. In this article, with transstilbene as an example, the regulation of halogen-halogen interactions between organic π-conjugated molecules is achieved through chemical structure modification, that is introducing electron-donating methylthio group and changing the position of halogen substituents on trans-stilbene skeleton. The influence of halogen-halogen interactions on the aggregation structure and luminescence properties of trans-stilbenes was investigated.