Abstract
The rate of decay of triplet-triplet absorption of excited poly(2-vinylnaphthalene) (P2VN) and 2-ethylnaphthalene (2EN) in room temperature benzene solutions was studied as a function of an added triplet quencher, piperylene. It was found that the efficiency of triplet quenching decreases as the molecular weight of the polymer increases, which is interpreted as arising from the density of the polymer coil in solution. If triplet energy migration occurs along the polymer chain the exciton diffusion constant is not significantly larger than the physical diffusion of the monomer model compound, 2EN. The triplet state was produced in solution by a 4 MeV electron beam, because the S 1 → T 1 process was found to be very inefficient for P2VN under optical excitation conditions.
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