Fast visible light-induced synthesis of annulated perylene bisimides
作者:Wenxuan Mao、Lu Sun、Junji Zhang
DOI:10.1016/j.dyepig.2020.108372
日期:2020.7
Perylene-3, 4, 9, 10-bisimides (PBIs) are a family of classic functional dyes that are active in the fabrication of optic-electronic devices, such as non-fullerene acceptors in organic photovoltaics and n-type organic field effect transistors. Functionalization of PBIs with amidation or annulation not only modulates their intrinsic photochemical and photophysical performances but also brings new products
forms a twin crystal of asymmetric nature with interactions between the electron‐rich oxygen atom of the methoxy group and the carbon atom of the electron‐deficient benzobisthiadiazole moiety. This work contributes to the understanding of aromaticity‐controlled thermal stability of photochromic systems based on a six‐membered ring as an ethene bridge, and a broadening of the novel building blocks for photochromic
三种光致变色化合物-2-丁基-5,6-双[5-(4-甲氧基苯基)-2-甲基噻吩-3-基] -1 H-苯并[ de ]异喹啉-1,3(2 H)-二酮( BTE-NA),含有萘二甲酰亚胺的4,5-双[5-(4-甲氧基苯基)-2-甲基噻吩-3-基]苯并[ c ] [1,2,5]噻二唑(BTA)和BTTA,对苯并噻二唑和苯并二噻二唑作为具有不同芳族性的六元乙烯桥进行了系统研究,包括溶液状态,溶胶-凝胶状态和单晶状态。它们表现出典型的光致变色性能,并具有相当高的环化量子产率。BTE-NA,BTA和BTTA构成了典型的供体-π-受体(D–π–A)系统在激发后在HOMO和LUMO之间具有显着的分子内电荷转移(ICT),从而实现了光致变色和溶剂致变色的荧光调制。具有不同芳香度的三个乙烯桥可以提供系统比较其相应封闭形式(c-BTE-NA,c-BTA和c-BTTA)的热稳定性的变化。c-BTE-NA在从环
Multiple hydrogen-bonding motifs serve as important building blocks for molecular recognition and self-assembly. Herein, a photoswitchable quadruple hydrogen-bonding motif featuring near-complete, reversible, and thermostable conversion between DADA and AADD arrays associated with an alteration of their dimerization constants by over 3 orders of magnitude is reported. The system is based on a diarylethene