Resonant and phonon-assisted excitation energy transfer in theR1line of [Cr(ox)3]3−

Autor:	Andreas Hauser, René Pellaux, Hans Riesen, Marianne Elisabeth Hazenkamp-von Arx, Silvio Decurtins
Rok vydání:	1996
Předmět:	chemistry.chemical_compound Bipyridine Nuclear magnetic resonance Materials science chemistry Phonon Physical chemistry Chromophore Fluorescence Excitation Oxalate Spectral line Line (formation)
Zdroj:	Physical Review B. 54:15800-15807
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.54.15800
Popis:	In resonant fluorescence line narrowing (FLN) experiments in the R1 transition of the [Cr(ox)3]3- chromophore in [Ru(bpy)3][NaAl:Cr(1%)(ox)3] and [Rh(bpy)3][NaCr(ox)3]ClO4 multiline spectra are observed at 1.8 K, (ox=oxalate, bpy=2,2'-bipyridine). For [Rh(bpy)3][NaCr(ox)3]ClO4 the number of lines and their relative intensities depend critically upon the excitation wavelength within the inhomogeneous distribution, and in time-resolved FLN experiments additionally upon the delay. This behavior is clear evidence for a resonant energy-transfer process. At 4.2 K the more common phonon-assisted process becomes dominant, manifesting itself as spectral diffusion.
Databáze:	OpenAIRE
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