Laser flash photolysis of metal oxide supported vanadyl catalysts. Spectroscopic evidence for the ligand-to-metal charge-transfer state
- 2 November 2005
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 16 (2) , 216-220
- https://doi.org/10.1039/b510840c
Abstract
A series of vanadyl containing samples supported on metal oxides (SiO2, Al2O3, K-doped Al2O3, TiO2, MgO and ZnO) have been studied by laser flash photolysis. Excitation at 266 or 308 nm generated transients (300 nm < λmax < 500 nm) with lifetimes on the microsecond time scale. These were assigned to the ligand-to-metal charge-transfer triplet excited state. The absorption maximum varied with the nature of the support. Samples having higher vanadium loading showed additional transients attributed to vanadyl aggregates.Keywords
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