Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6468656 | Comptes Rendus Chimie | 2017 | 7 Pages |
Long-range electron transfer reactions play a key role in biological photosynthesis, and they are likely to play an important role for future artificial photosynthetic endeavors as well. The possibility to control the rates for long-range electron transfer with external stimuli is of particular interest in this context. In the work presented herein, we explored a donor-bridge-acceptor compound in which intramolecular electron transfer from a triarylamine donor to a photoexcited Ru(bpy)32+ (bpy = 2,2â²-bipyridine) acceptor occurs across an organoboron bridge over a distance of approximately 22 à . Fluoride has a high binding affinity to the organoboron bridge in apolar solutions, and the resulting organofluoroborate has a significantly different electronic structure. We explored to what extent the change from an electron-deficient organoboron wire to an electron-rich organofluoroborate bridge affects long-range electron transfer between the distant triarylamine donor and the Ru(bpy)32+ acceptor.
Graphical abstractThe effect of fluoride binding to an organoboron bridge on long-range electron transfer was investigated.Download high-res image (130KB)Download full-size image