Effect of Temperature on the Rate of Triplet–Triplet Annihilation of 1,2-Benzanthracene in a Polymer Matrix |
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| Authors: | V. V. Bryukhanov I. G. Samusev S. G. Karstina |
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| Affiliation: | (1) Kaliningrad State Technical University, 1 Sovetskii Ave., Kaliningrad, 236000, Russia;(2) E. A. Buketov Karaganda State University, Karaganda, Kazakhstan |
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| Abstract: | The process of triplet–triplet annihilation (TTA) of 1,2-benzanthracene (1,2-BA) incorporated into polymer films of polyvinyl butyral has been investigated in the temperature interval 80–360 K. An analysis of the kinetics of the decay of delayed annihilation fluorescence (DAF) of 1,2-BA has shown that the process of the triplet excitation energy transfer in a disperse medium of the polymer at distant times of the DAF decay can be described using the approximation of random walks of the triplet energy in the inhomogeneous medium of the polymer. At low temperatures, at the initial times of DAF decay the TTA process is described with the aid of a model of static annihilation. |
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| Keywords: | luminescence delayed annihilation fluorescence phosphorescence fractal dimension 1,2-benzanthracene polymer static annihilation Dexter radius fractal kinetics |
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