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THE ABSOLUTE VALUE OF THE REACTION RATE CONSTANT OF BILIRUBIN WITH SINGLET OXYGEN IN D 2 O
Author(s) -
Matheson I. B. C.
Publication year - 1979
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1979.tb07785.x
Subject(s) - singlet oxygen , chemistry , reaction rate constant , aqueous solution , oxygen , micelle , singlet state , sodium dodecyl sulfate , photochemistry , absorption (acoustics) , analytical chemistry (journal) , kinetics , atomic physics , organic chemistry , excited state , physics , optics , quantum mechanics
— The chemical reaction rate constant of bilirubin with singlet oxygen in basic aqueous solution has been redetermined to be 3.5 × 10 8 M ‐1 s ‐1 by a competitive technique using a 1,3‐diphenylisobenzofuran in sodium dodecyl sulfate micelles. Bilirubin also physically quenches a singlet oxygen with a rate constant of 9 × 10 8 M ‐1 s ‐1 . The lifetime of singlet oxygen in D 2 O solution has been determined to be 35 μ s . The absorption cross‐section for the molecular oxygen 3 ∑ g ‐→ 1 δ g + 1 v electronic transition at 1.06μn in aqueous solution is unexpectedly larger than the gas paase cross‐section.