2010•Chinese Physics BRequires access

Intramolecular photoinduced electron-transfer in azobenzene-perylene diimide

Wenke Feng, Yiyu Feng, Shufeng Wang, Wei Feng, Wenhui Yi, Qihuang Gong

Abstract

This paper studies the intramolecular photoinduced electron-transfer (PET) of covalent bonded azobenzene-perylene diimide (AZO-PDI) in solvents by using steady-state and time-resolved fluorescence spectroscopy together with ultrafast transient absorption spectroscopic techniques. Fast fluorescence quenching is observed when AZO-PDI is excited at characteristic wavelengths of AZO and perylene moieties. Reductive electron-transfer with transfer rate faster than 10 11 s −1 is found. This PET process is also consolidated by femtosecond transient absorption spectra.

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Key concepts: Diimide, Perylene, Photochemistry, Photoinduced electron transfer, Ultrafast laser spectroscopy, Intramolecular force, Azobenzene, Materials science