CROCETIN, A WATER SOLUBLE CAROTENOID MONITOR FOR SINGLET MOLECULAR OXYGEN
- 1 July 1982
- journal article
- research article
- Published by Wiley in Photochemistry and Photobiology
- Vol. 36 (1) , 1-4
- https://doi.org/10.1111/j.1751-1097.1982.tb04331.x
Abstract
The water soluble carotenoid crocetin has been studied as a singlet molecular oxygen monitor in D2O solution, pD 8.4. Crocetin reacts chemically with singlet molecular oxygen with a rate constant of 4 x 108M‐1 s‐1. The rate constant for total quenching, chemical and physical, is 2.5 x 109M‐1 s‐1. Crocetin shows evidence for a reversible reaction with singlet molecular oxygen, as demonstrated by a fairly rapid absorption recovery after bleaching.Keywords
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