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Homo-FRET in π-Conjugated Polygons: Intermediate-Strength Dipole–Dipole Coupling Makes Energy Transfer Reversible

Wilhelm, Philipp ; Vogelsang, Jan ; Höger, Sigurd ; Lupton, John M.


The concept of homo-FRET is often used to describe energy transfer between like chromophores of molecular aggregates such as in pi-conjugated polymers. Homo-FRET is revealed by a dynamic depolarization in fluorescence but strictly only applies to the limit of weak dipole-dipole coupling, where energy transfer occurs on time scales much longer than those of nuclear relaxation. By considering the ...


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