Electron spin-controlled charge transfer and the resulting long-lived charge transfer state: from transition metal complexes to organic compounds

Xue Zhang; Xi Chen; Jianzhang Zhao

doi:10.1039/d0dt03737k

Electron spin-controlled charge transfer and the resulting long-lived charge transfer state: from transition metal complexes to organic compounds

Dalton Trans. 2021 Jan 7;50(1):59-67. doi: 10.1039/d0dt03737k. Epub 2020 Dec 18.

Authors

Xue Zhang¹, Xi Chen, Jianzhang Zhao

Affiliation

¹ State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, E-208 West Campus, 2 Ling Gong Road, Dalian 116024, P. R. China. zhaojzh@dlut.edu.cn.

PMID: 33338095
DOI: 10.1039/d0dt03737k

Abstract

The generation of long-lived charge transfer (CT) states in electron donor/acceptor dyads upon photoexcitation is crucial for artificial photosynthesis, photocatalysis and photovoltaics. Electron spin control is a novel strategy to prolong the CT state lifetime via generation of the ³CT triplet state, instead of the traditional short-lived ¹CT state. This method involves a local triplet excited state (³LE) as the precursor of charge separation (CS), and the electron forbidden feature of the charge recombination (CR) of ³CT → S₀vs. the electron spin allowed ¹CT → S₀ prolongs the CT state lifetime. In this article, we summarized the recent developments and challenges in this emerging fascinating area.