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- W1965074702 abstract "Transient decays of triplet−triplet (TT) absorption of excited triplet benzophenone (BP) chromophore in poly(4-methacryloylbenzophenone-co-methyl methacrylate) (BPX, X is the mol % of BP, X = 1−100) films were studied by laser photolysis with a kinetic scheme involving a TT annihilation in a wide temperature range (20−240 K). The rate constant of the TT annihilation was analyzed by a diffusion model of the BP triplet state. The calculated diffusion coefficient (D) increased greatly with the increase of temperature and BP concentration in the BPX sample from 1 × 10-11 cm2 s-1 (20 K, X = 1) to 5 × 10-7 cm2 s-1 (240 K, X = 100). The steep increase in D was observed at the average BP distance less than 1.2 nm and above ca. 150 K. This temperature corresponds to Tγ of poly(methyl methacrylate), α-methyl rotation." @default.
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- W1965074702 date "1996-01-01" @default.
- W1965074702 modified "2023-09-25" @default.
- W1965074702 title "Triplet Energy Migration in Poly(4-methacryloylbenzophenone-<i>co</i>-methyl methacrylate) Films: Temperature Dependence and Chromophore Concentration Dependence" @default.
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- W1965074702 doi "https://doi.org/10.1021/ma9509671" @default.
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