dc.creator Watts, Richard J. en_US dc.creator Strickler, S. J. en_US dc.date.accessioned 2006-06-15T16:46:52Z dc.date.available 2006-06-15T16:46:52Z dc.date.issued 1968 en_US dc.identifier 1968-Q-4 en_US dc.identifier.uri http://hdl.handle.net/1811/15564 dc.description This work was supported by a grant from the National Science Foundation. Richard J. Watts is a N.D.E.A. predoctoral fellow. en_US dc.description Author Institution: Department of Chemistry, University of Colorado en_US dc.description.abstract The effect of the number and position of deuterium sbstituents on the phosphorescence lifetime has been studied for eight different isotopic naphthalenes at $76^{\circ} K$. These studies reveal a significant dependence of the rate of radiationless decay to the ground state on the positions of the protons in the molecule. This conclusion is contrary to the conclusion of Lin and Bersohn that the radiationless decay is independent of the positions of the protons. It is found that protons in the $\alpha$ positions are about 1.6 times as effective as protons in the $\beta$ positions in promoting radiationless transitions. A simple empirical relation is found to give a reasonable fit to the data. A small intermolecular isotope effect on the triplet state lifetime of napthalene-$d_{8}$ in ethanol is also found upon deuteration of the solvent. The experimental results are discussed in terms of existing theories of radiationless processes. en_US dc.format.extent 156063 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title DEUTERIUM ISOTOPE EFFECTS ON THE LIFETIME OF THE PHOSPHORESCENT TRIPLET STATE OF NAPHTHALENE en_US dc.type article en_US
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