Cascading electron transfer and photophysics in a donor-π-acceptor graphene nanoconjugate  

作　　者：Lulu Fu Hui Li Yan Fang Zihao Guan Zhiyuan Wei Naying Shan Fang Liu Yang Zhao Mingfei Zhang Zhipeng Huang Mark GHumphrey Chi Zhang 

机构地区：[1]China-Australia Joint Research Center for Functional Molecular Materials,School of Chemical Science and Engineering,Tongji University,Shanghai 200092,China [2]Research School of Chemistry,Australian National University,Canberra,ACT 2601,Australia

出　　处：《Nano Research》2023年第4期5909-5918,共10页纳米研究（英文版）

基　　金：Financial support from the National Natural Science Foundation of China(No.51432006);the Ministry of Science and Technology of China for the International Science Linkages Program(No.2011DFG52970);the Ministry of Education of China for the Changjiang Innovation Research Team(No.IRT14R23);the Ministry of Education and the State Administration of Foreign Experts Affairs for the 111 Project(No.B13025);the Innovation Program of Shanghai Municipal Education Commission are gratefully acknowledged.M.G.H thanks the Australian Research Council(No.DP170100411)for support.

摘　　要：Electron-donating porphyrins(Por),electron-accepting phthalocyanines(Pcs),and reduced graphene oxide(RGO)were integrated into a multicomponent nanoconjugate(Por-RGO-Pc).The donor-π-acceptor nanoconjugate Por-RGO-Pc was characterized using Fourier transform infrared spectroscopy(FTIR),transmission electron microscopy(TEM),scanning electron microscopy(SEM),atomic force microscopy(AFM),and ultraviolet-visible(UV-Vis)spectroscopy.Photoinduced cascading electron/charge transfer from Por to RGO and from RGO to Pc was established from fluorescence,electrochemical,and femtosecond transient absorption(fs-TA)spectroscopy studies.The increased distance between the electron donors and acceptors of the Por-RGO-Pc nanoconjugate compared to the parent materials and the intermediate RGO-Pc results in longlived charge separation,and an enhancement in nonlinear optical(NLO)absorption(a large NLO coefficient of about 827.44 cm/GW)towards nanosecond laser irradiation at 532 nm.

关 键 词：GRAPHENE nanoconjugate donor-π-acceptor(D-π-A) cascading charge separation nonlinear optics 

分 类 号：TQ127.11[化学工程—无机化工]