Sensitized phosphorescence studied by the site selection technique

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Abstract
Sensitized phosphorescence of 1-iodonaphthalene (energy donor) and perfluorated naphthalene (energy acceptor) has been studied in solid solutions at 4.2 K. The donor is excited by a laser in a site selection experiment. We observe that the site selection is conserved during the triplet energy transfer. This is consistent with a modification of Dexter’s theory of sensitized phosporescence that includes the site energy distribution of the donor and acceptor molecules.