Electronic Energy Radiationless Transition as Radiationless Dipole-Dipole Energy Transfer to Vibrations of Solvent Molecules
The main cause of the degradation of electronic excitation energy in rare-earth and transition metal ions is shown to he an inductive-resonance dipole-dipole energy transfer from excited ions to the solvent vibration overtones. The suggested mechanism can quantitatively explain such regularities as: 1. the linear dependence of log kdegr. on ΔE, and the causes of deviation from linearity; 2. deuteriun influence upon kdegr.; 3. existence of spin forbiddenness for radiationless transitions; and 4. dependence of kdegr. on distance between the excited ions and the nearest high frequency vibration groups of the solvent. It is shown that this mechanism of energy degradation holds equally well for any aggregate state: liquid, glass and crystal.
KeywordsSolvent Molecule Luminescence Spectrum Aggregate State Electronic Excitation Energy Energy Acceptor
Unable to display preview. Download preview PDF.
- 3.E.B. Sveshnikova, V.L. Ermolaev, Optika i Spectroscopia 30, 379 (1971).Google Scholar
- 6.G.A. Mokeeva, S.P. Lunkin, P.P. Feofilov, Jurnal Prikladnoi Spectroscopii, 4, 245 (1966).Google Scholar
- 7.R.G. Wykoff, Crystal Structures Vol. 3, Interscience, New York (1965) p. 793.Google Scholar
- 8.E.B. Sveshnikova, I.B. Neporent, Izvest. Akad. Nauk SSSR (Ser. Fiz.) 36, 1087 (1972).Google Scholar