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ERGOSTEROL (PROVITAMIN D2) TRIPLET STATE: AN EFFICIENT SENSITISER OF SINGLET OXYGEN, O 2 ( 1Δ g ), FORMATION
Author(s) -
Gorman A. A.,
Hamblett I.,
Rodgers M. A. J.
Publication year - 1987
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.1751-1097.1987.tb05366.x
Subject(s) - singlet oxygen , triplet state , photochemistry , chemistry , ergosterol , quenching (fluorescence) , singlet state , oxygen , benzene , radiolysis , excited state , fluorescence , molecule , radical , atomic physics , organic chemistry , physics , biochemistry , quantum mechanics
The triplet state of ergosterol (provitamin D2) has been produced in benzene by pulse radiolysis and characterised in terms of absorption spectrum, lifetime, self‐quenching properties and relaxed triplet energy. The amount of singlet oxygen, O 2 ( 1 Δ g ), produced as a consequence of the oxygen quenching of this species has been determined by kinetic infrared emission spectroscopy. Ergosterol is significantly more efficient as a singlet oxygen sensitiser in benzene than is naphthalene, the absolute standard employed in this work.