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Studies have been made of electronic energy transfer from the naphthalene groups in poly-(1-naphthyl methacrylate) to vinylanthracene traps located at chain ends. It is shown that the transfer is strictly intramolecular in dilute solution, and that the efficiency of transfer depends on the solvent power, being greater in solvents which tend to reduce the dimensions of the random coil. Studies of fluorescence decay times by photon counting suggest that the transfer of energy takes place in times of 1 ns or less, and temperature studies indicate that transfer occurs from naphthyl monomer rather than the excimer.

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