Abstract
To investigate the rates of diffusion-controlled intramacromolecular reactions between a pair of terminal groups of a flexible polymer, substantially monodisperse α,ω-dianthrylpolystyrenes (A–PS–A) were prepared and the decay curves of their P-type delayed fluorescence due to the triplet–triplet interaction (T–T annihilation) of terminal anthryl groups were measured in benzene, butanone, and cyclohexane at 30°C, using 10-ns nitrogen laser pulse. The rate constants for the intramolecular reaction kTTintra could be obtained by removing the contribution of intermolecular triplet–triplet interaction to the decay curves. They are of the order of 104 s−1 and decreased with the degree of polymerization as DP−0.53 in benzene and DP−0.60 in butanone for DP=280—3000. The dependence of kTTintra on the degree of polymerization found in this work is very small compared with those obtained previously for the range of small DP. The implication of this result is briefly discussed.
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Ushiki, H., Horie, K., Okamoto, A. et al. Rate of Diffusion-Controlled Intramolecular Triplet–Triplet Annihilation between the Terminal Groups of α,ω-Dianthrylpolystyrene. Polym J 13, 191–200 (1981). https://doi.org/10.1295/polymj.13.191
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DOI: https://doi.org/10.1295/polymj.13.191