Non-radiative transitions as Förster's energy transfer to solvent vibrations |
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Authors: | V L Ermolaev E B Sveshnikova |
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Institution: | The State Optical Institute, Leningrad 199164, USSR |
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Abstract: | New experimental evidence is given to the approach suggested by the authors to non-radiative transitions in rare earth and transition metal ions as radiationless energy transfer from ion to ligand and solvent molecule vibrations. Using non-radiative transitions in Yb3+ as an example the participation of combinations of vibrations in the electronic energy dissipation was investigated. Dy3+ in solutions was used to show the role of anharmonicity in non-radiative transitions. It was proved that the semi-empirical calculations of non-radiative transition rates by Förster's formula gave also good results for Mn2+ ions luminescence which is an example of “strong” vibronic interaction. The suggested approach permits to explain the anomalous low probability of the 5D1?5D0 non-radiative transition in the Eu3+ ion. |
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