Direct spectroscopic evidence for 1ΔgO2 production from the photolysis of vanadium(V)-peroxo complexes in aqueous solution

Pi Tai Chou*, Ming Zen Lee, Chin Yen Wei, Quo Ray Wu, Lai Kuen Shek, Daniel W J KWONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The chemiluminescence of 1ΔgO2 expelled from the UV photolysis of vanadium(V)-peroxo (VP) complexes in aqueous solution was observed for the first time. Using phenalenone photosensitization as a standard reference, the 1O2 quantum yields from the photolysis of 12 VP complexes were measured. No good correlation was found between the relative DNA-photocleavage activities and the 1O2 quantum yields of these complexes. This lack of correlation underscores the significant contribution of the complex-DNA binding interaction in determining the observed DNA-photocleavage activity of the complex. The small 1O2 quantum yields observed in these complexes were interpreted in terms of the minor 1O2 photoelimination channel relative to other more efficient relaxation processes.

Original languageEnglish
Pages (from-to)745-750
Number of pages6
JournalPhotochemistry and Photobiology
Volume70
Issue number5
DOIs
Publication statusPublished - Nov 1999

Scopus Subject Areas

  • Biochemistry
  • Physical and Theoretical Chemistry

Fingerprint

Dive into the research topics of 'Direct spectroscopic evidence for <sup>1</sup>Δ<sub>g</sub>O<sub>2</sub> production from the photolysis of vanadium(V)-peroxo complexes in aqueous solution'. Together they form a unique fingerprint.

Cite this