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- Title
Reaction between Molecular Oxygen and Photo-excited Protoporphyrin IX.
- Authors
DALTON, J.; MCAULIFFE, C. A.; SLATER, DAVID H.
- Abstract
THE absorption spectrum of protoporphyrin IX in tetrahydrofuran solution has maxima at 404 (Soret band), 503, 536, 576 and 633 nm. Excitation at any of these wavelengths produced an intense red emission with its maximum at 635 nm1. The same emission spectrum was observed when added biacetyl was irradiated at its 436 nm absorption. In these conditions the biacetyl phosphorescence was completely quenched. Additionally, molecular oxygen quenched the protoporphyrin IX emission spectrum following Stern-Volmer kinetics. Typical experimental results, obtained at 25° C, are plotted in Fig. 1.
- Publication
Nature, 1972, Vol 235, Issue 5338, p388
- ISSN
0028-0836
- Publication type
Article
- DOI
10.1038/235388a0