Metal substitution in a Lindqvist polyoxometalate leads to improved photocatalytic performance†
Abstract
The photochemical properties of homo- and heterometallic molybdate-based Lindqvist polyoxometalate clusters are investigated in a comparative study and it is shown that vanadium substitution can be used as a facile synthetic tool to optimize the visible light absorption and photocatalytic activity of the cluster. The mono-vanadium substituted unit, [VMo5O19]3− shows light absorption up to 480 nm whereas the light absorption of the molybdate analogue [Mo6O19]2− is mainly in the UV region below 400 nm. The electronic absorption properties of both clusters are further investigated using TD-DFT calculations which show that vanadium incorporation leads to the formation of low-energy O → V LMCT transitions. In comparative photochemical
- This article is part of the themed collection: Polyoxometalates