Abstract
Excitation energy transfer between coumarin derivatives and acridine orange (AO) in solutions of two different viscosities has been studied. The rate constants of the electronic energy transfer ( k ET) and critical radius ( R 0) were determined for coumarin derivatives as donors and AO as acceptor. The obtained values of k ET and R 0 indicate that dipole–dipole interaction between D–A pairs is responsible for the energy transfer mechanism. The experimental data of energy transfer efficiency are well described by the Förster theory.
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