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DIFFERENTlAL REACTIVITY OF EXCITED SINGLETS AND TRIPLETS *
Author(s) -
Rosenberg J. L.
Publication year - 1964
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.1751-1097.1964.tb08152.x
Subject(s) - excited state , reactivity (psychology) , polarizability , chemistry , quenching (fluorescence) , photochemistry , singlet state , molecule , spin (aerodynamics) , singlet fission , atomic physics , chemical physics , physics , fluorescence , quantum mechanics , organic chemistry , thermodynamics , medicine , alternative medicine , pathology
Summary Experimental data from the oxygen quenching of excited states, from the acidities of excited states, and from the kinetics of photosynthesis indicate that the lowest excited singlet and the lowest triplet states of aromatic molecules may not have the same reactivity. The reasons for these differences may be connected with the energy deficit of triplets, with spin conservation rules, with differences in the nuclear geometry, or with differences in the electronic configuration or polarizability. With improved theoretical representations of excited states, the observed differences in reactivity may serve to increase our understanding of the nature of primary photochemical events.