Photoinduced Electron Transfer in an Anthraquinone-[Ru(bpy)3](2+)-Oligotriarylamine-[Ru(bpy)3](2+)-Anthraquinone Pentad

Inorg Chem. 2016 Mar 21;55(6):2894-9. doi: 10.1021/acs.inorgchem.5b02757. Epub 2016 Mar 8.

Abstract

A molecular pentad comprised of a central multielectron donor and two flanking photosensitizer-acceptor moieties was prepared in order to explore the possibility of accumulating two positive charges at the central donor, using visible light as an energy input. Photoinduced charge accumulation in purely molecular systems without sacrificial reagents is challenging, because of the multitude of energy-wasting reaction pathways that are accessible after excitation with two photons. As expected, the main photoproduct in our pentad is a simple electron-hole pair, and it is tricky to identify the desired two-electron oxidation product on top of the stronger signal resulting from one-electron oxidation.

Publication types

  • Research Support, Non-U.S. Gov't