Abstract
Copolymer of methylmethacrylate with methacrylate of monopropandiole ether of benzophenonecarbone acid (BCA-MMA) with different contents of the benzophenone-type groups has been studied. Investigation of absorption and luminescence spectra of solutions of BCA-MMA, dependence of phosphorescence intensity on intensity of exciting light and dependence of polarization degree on content of BCA links in copolymer macromolecule has been carried out. Basing on data obtained it was found that the migration of t-excitons and their effective annihilation in macromolecules of BCA-MMA took place starting from 32.6% content of the benzophenone-type links. Using computer calculation for a geometry optimization of the studied polymers the average distance between chromophores for BCA-MMA containing ∼20% and ∼33% of the benzophenone-type links was determined. It is asserted that the critical jump distance for the triplet excitons in studied polymers is in these limits and is equal approximately 20 Å.
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