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.
|Number of pages||6|
|Journal||Photochemistry and Photobiology|
|Publication status||Published - Nov 1999|
Scopus Subject Areas
- Physical and Theoretical Chemistry