Photoinduced energy and electron transfer in phenylethynyl-bridged zinc porphyrin-oligothienylenevinylene-C60 ensembles

Chemistry : a European Journal
Maxence UrbaniFernando Langa

Abstract

Donor-bridge-acceptor triad (Por-2TV-C(60)) and tetrad molecules ((Por)(2)-2TV-C(60)), which incorporated C(60) and one or two porphyrin molecules that were covalently linked through a phenylethynyl-oligothienylenevinylene bridge, were synthesized. Their photodynamics were investigated by fluorescence measurements, and by femto- and nanosecond laser flash photolysis. First, photoinduced energy transfer from the porphyrin to the C(60) moiety occurred rather than electron transfer, followed by electron transfer from the oligothienylenevinylene to the singlet excited state of the C(60) moiety to produce the radical cation of oligothienylenevinylene and the radical anion of C(60). Then, back-electron transfer occurred to afford the triplet excited state of the oligothienylenevinylene moiety rather than the ground state. Thus, the porphyrin units in (Por)-2TV-C(60) and (Por)(2)-2TV-C(60) acted as efficient photosensitizers for the charge separation between oligothienylenevinylene and C(60).

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Citations

May 28, 2015·Physical Chemistry Chemical Physics : PCCP·So-Yoen KimSang Ook Kang
Dec 9, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Guo Fan JinSang Ook Kang
Aug 24, 2017·Physical Chemistry Chemical Physics : PCCP·Di GaoPierre D Harvey
Nov 19, 2013·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Mohamed E El-KhoulyFrancis D'Souza
Mar 5, 2015·Chemistry : a European Journal·Beatriz PeladoFernando Langa
Mar 14, 2018·The Journal of Organic Chemistry·Martin JakubecJan Storch
Dec 10, 2020·The Journal of Organic Chemistry·Mina AhnKyung-Ryang Wee

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