The nature of photoinduced intermolecular charger transfer in fluorescence resonance energy transfer

Huan Zong; Xijiao Mu; Jiangcai Wang; Huifang Zhao; Ying Shi; Mengtao Sun

doi:10.1016/j.saa.2018.10.052

The nature of photoinduced intermolecular charger transfer in fluorescence resonance energy transfer

Spectrochim Acta A Mol Biomol Spectrosc. 2019 Feb 15:209:228-233. doi: 10.1016/j.saa.2018.10.052. Epub 2018 Oct 30.

Authors

Huan Zong¹, Xijiao Mu¹, Jiangcai Wang¹, Huifang Zhao², Ying Shi³, Mengtao Sun⁴

Affiliations

¹ Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Center for Green Innovation, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, People's Republic of China.
² Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, People's Republic of China.
³ Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, People's Republic of China. Electronic address: shi_ying@jlu.edu.cn.
⁴ Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Center for Green Innovation, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, People's Republic of China. Electronic address: mengtaosun@ustb.edu.cn.

PMID: 30412848
DOI: 10.1016/j.saa.2018.10.052

Abstract

In this paper, we report time resolved fluorescence resonance energy transfer (FRET) using femtosecond ultrafast transient absorption spectroscopy. The lifetimes of FRET are strongly dependent on the molecular concentration and ratio of donor and acceptor. Also, in the FRET, photoinduced intermolecular charge transfer (PICT) is also investigated theoretically. The driving force for PICT in FRET system equals the reorganization energy, which gives barrier-less charge transfer according to Marcus theory. The rates of PICT in the FRET system can be estimated with our simplified Marcus equation. Our results of PICT in FRET system provide a new efficient way for the charge transfer in donor-acceptor system.

Keywords: Charge transfer; FRET.