Abstract
Monodisperse polystyrenes (PS) with different degrees of polymerization (DP) and with anthryl groups at the chain ends were prepared. The decay of the triplet state of anthryl groups excited by 10 ns nitrogen-laser pulse was monitored by delayed fluorescence in benzene at 30°C. The triplet of anthryl groups attached to PS decayed much faster than that of 9-methylanthracene (MA) because the excited anthryl groups were quenched by side chains of PS intra-and inter-molecularly. The intramacromolecular quenching rate constants determined are independent of DP, with an average value of 1.0×103 s−1 at 30°C, while the intermacromolecular quenching rate constants expressed in base M−1 s−1 are of the order of 104 to 106 M−1 s−1 and approximately proportional to DP−0.79 in benzene for the range of DP=44—10000.
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Ushiki, H., Horie, K., Okamoto, A. et al. Molecular-Weight Dependence of Quenching Rate of α-Anthrylpolystyrene as Studied by Laser-Pulse Induced Delayed Fluorescence. Polym J 11, 691–698 (1979). https://doi.org/10.1295/polymj.11.691
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DOI: https://doi.org/10.1295/polymj.11.691
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