Abstract
A survey of investigations devoted to the mechanisms of intermolecular energy transfer between organic compounds and metal ions in solutions has been published recently. However, such investigations encounter difficulties due to the influence of exchange reactions associated with rearrangement of solvate shells of molecules and ions. In connection with this it is more promising to investigate intramolecular energy transfer between the indicated comments of a system. The present work provides examples that unambiguously indicate a dipole-dipole mechanism of energy transfer as the main reason of the observed quenching for the fluorescent state of dyed ligands in complexes with paramagnetic REE ions and an exchange mechanism of energy transfer as the main reason of quenching of the triplet state of ligands by them. Results of these studies have been reported recently at international conferences.
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