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Issue 2, 2006
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Laser flash photolysis of metal oxide supported vanadyl catalysts. Spectroscopic evidence for the ligand-to-metal charge-transfer state

Hermenegildo García,*a  Jose Manuel López-Nieto,*a  Emilio Palomares,a  Heinz D. Roth*b  and  Benjamín Solsonaa 
Author affiliations

* Corresponding authors

a Instituto de Tecnología Química-UPV-CSIC, Universidad Politécnica de Valencia, Apartado 22012, Spain

b Department of Chemistry and Chemical Biology, Rutgers University, 610 Taylor Road, New Brunswick, USA
E-mail: roth@rutchem.rutgers.edu

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.

Graphical abstract: Laser flash photolysis of metal oxide supported vanadyl catalysts. Spectroscopic evidence for the ligand-to-metal charge-transfer state

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Publication details

The article was received on 29 Jul 2005, accepted on 10 Oct 2005 and first published on 02 Nov 2005


Article type: Paper
DOI: 10.1039/B510840C
Citation: J. Mater. Chem., 2006,16, 216-220
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    Laser flash photolysis of metal oxide supported vanadyl catalysts. Spectroscopic evidence for the ligand-to-metal charge-transfer state

    H. García, J. M. López-Nieto, E. Palomares, H. D. Roth and B. Solsona, J. Mater. Chem., 2006, 16, 216
    DOI: 10.1039/B510840C

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