Side-chain engineering for regulating structure and properties of a novel visible-light-driven perylene diimide-based supramolecular photocatalyst  

作　　者：Li Yang GaoYuan Chen Xuan Yang Yudong Wang Xinling Zhang Yingjie Guo Jun Wang Di Liu 

机构地区：[1]School of Chemical&Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China [2]School of Advanced Energy,Sun Yat-sen University(Shenzhen),Shenzhen 518107,China [3]State Key Laboratory of Environment-Friendly Energy Materials,School of Materials and Chemistry,Southwest University of Science and Technology,Mianyang 621010,China

出　　处：《Green Carbon》2024年第3期300-309,共10页绿碳（英文）

基　　金：supported by the Chinese National Science Foundation(21806181);Fundamental Research Funds for the Central Universities(2023ZKPYHH05,2024ZKPYHH01).

摘　　要：Systematic and in-depth explorations of the effects of side-chain modulation on the molecular assembly,optoelectronic properties,and photocatalytic properties of supramolecular systems,as well as the kinetics of charge separation and migration in these systems,are rare.In this study,a novel supramolecular photocatalyst with an alkoxy side chain(S-EPDI)was successfully developed through subtle design of the short and linear alkoxyl side chains,affording a phenol degradation efficiency approximately four times that of the counterpart with an alkyl side chain(S-APDI).Notably,combined density functional theory(DFT)calculations,absorption spectroscopy,and other characterizations revealed that the perylene diimide(PDI)molecular units,throughπ-πstacking,formed a unique rotationally offset stacked supramolecular structure,exhibiting a significant dipole moment.This gave rise to the formation of a larger inherent electric field within S-EPDI compared to S-APDI.Moreover,the study quantitatively demonstrated that a stronger inherent electric field and lower rate of surface charge recombination facilitate efficient separation of the photogenerated carriers.Therefore,the side-chain molecular engineering method employed in this study offers an effective approach for modulating the kinetics of charge migration.

关 键 词：Side-chain engineering Perylene diimide PHOTOCATALYSIS Supramolecular materials 

分 类 号：O62[理学—有机化学]