Carbon dot-based artificial light-harvesting systems with sequential energy transfer and white light emission for photocatalysis  

作　　者：Chaoqun Ma Yuebo Wang Ning Han Rongzhen Zhang Hui Liu Xiaofeng Sun Lingbao Xing 

机构地区：[1]School of Chemistry and Chemical Engineering,Shandong University of Technology,Zibo 255000,China [2]Department of Materials Engineering,KU Leuven,Leuven 3001,Belgium

出　　处：《Chinese Chemical Letters》2024年第4期409-413,共5页中国化学快报（英文版）

基　　金：the financial support from the National Natural Science Foundation of China (Nos.52205210 and 22002075);the Natural Science Foundation of Shandong Province (Nos.ZR2020MB018 and ZR2022QE033)。

摘　　要：In this work, we designed and synthesized cationic carbon dots(CDs) with a size distribution of 1.6–3.7 nm, which exhibited dark blue fluorescence in the aqueous solution. Based on its excellent luminescence properties, we used it as an energy donor to construct a sequential artificial light-harvesting system(LHS) by employing the energy-matching dyes eosin Y disodium salt(EY) and sulforhodamine101(SR101), which could regulate the white light emission(Commission Internationale de l'Eclairage(CIE) coordinate:(0.30, 0.31)) with the energy transfer efficiency(ΦET) of 53.9% and 20.0%. Moreover, a single-step artificial LHS with white light emission(0.32, 0.28) can be constructed directly using CDs and dye solvent 43(SR) with ΦETand antenna effect(AE) of 48.8% and 6.5, respectively. More importantly,CDs-based artificial LHSs were firstly used in photocatalytic of α-bromoacetophenone, with a yield of90%. This work not only provides a new strategy for constructing CDs-based LHSs, but also opens up a new application for further applying the energy harvested in CDs-based LHSs to the field of the aqueous solution photocatalysis.

关 键 词：Carbon dots White light emission Energy transfer Antenna effect Artificial light-harvesting system PHOTOCATALYSIS 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]