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

Hermenegildo García, Jose Manuel López-Nieto, Emilio Palomares, Heinz D. Roth, Benjamín Solsona

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A series of vanadyl containing samples supported on metal oxides (SiO 2, 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.

Original languageEnglish (US)
Pages (from-to)216-220
Number of pages5
JournalJournal of Materials Chemistry
Volume16
Issue number2
DOIs
StatePublished - 2006

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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