D-π-A type carbazole and triphenylamine derivatives with different π-conjugated units: Tunable aggregation-induced emission (AIE) and mechanofluorochromic properties
作者:Yue Yang、Jin-jin Tian、Long Wang、Zhao Chen、Shouzhi Pu
DOI:10.1016/j.jphotochem.2022.113905
日期:2022.8
specifically, the solid-state fluorescence of D-π-A type compounds 1, 3, 4, and 6 can be reversibly switched by successive mechanical grinding and solvent fuming, while D-π-A type compounds 2 and 8 display irreversible mechanofluorochromism behaviors. Remarkably, when the pristine powders of these mechanical force-responsive fluorophores are ground, 1 and 2 exhibit an obvious blue-shift, while 3, 4, 6, and
设计、合成并充分表征了具有各种 π 共轭单元的八种供体-π-受体 (D-π-A) 骨架高亮度发光体1-8 。在合成发光体中,7和8具有典型的聚集诱导发射特性,并且这些报道的荧光团在固态下显示出不同的荧光。同时,除了固体5和7外,它们的固态发射行为可以通过机械研磨得到有效调控。更具体地说,D-π-A 型化合物1、3、4和6的固态荧光可以通过连续的机械研磨和溶剂发烟进行可逆转换,而 D-π-A 型化合物2和8则表现出不可逆的机械荧光变色行为。值得注意的是,当这些机械力响应荧光团的原始粉末被研磨时,1和2表现出明显的蓝移,而3、4、6和8表现出红移。粉末 X 射线衍射测量表明,这些观察到的各种机械响应荧光现象归因于结晶态和非晶态之间的不同形态相互作用。