Posted on 29 May 2012
The project entitled ‘Light-driven oxygen atom transfer’ combines molybdoenzyme-mimics with photosensitisers to improve the energy and atom efficiency of oxygenation processes. Oxo-molybdenum centres are used by nature as oxygen atom transfer catalysts due to their ability to redox cycle between oxidation states (VI) and (IV). The molybdenum-containing components were hence selected for their ability to catalyse oxygen atom transfer from water to a substrate whilst the chosen photosensitisers produce H2O2 from O2. Photoactivation and the use of clean oxygen sources, such as water and O2, are beneficial on both environmental and economic grounds.
General photoredox catalyst design and electron flow (PeT = photoinduced electron transfer).