Effect of relaxation processes on fluorescence lifetime and polarization characteristics of rhodamine 6G in glycerol

Autor:	I. A. Struganova, L. V. Levshin, B. N. Toleutaev
Rok vydání:	1986
Předmět:	Dye laser Chemistry Relaxation (NMR) Analytical chemistry Condensed Matter Physics Molecular physics Fluorescence spectroscopy Rhodamine 6G chemistry.chemical_compound Absorption band Excited state Spectroscopy Fluorescence anisotropy
Zdroj:	Journal of Applied Spectroscopy. 44:476-481
ISSN:	1573-8647 0021-9037
DOI:	10.1007/bf00667071
Popis:	Some new phenomena which can be attributed to the relaxation kinetics of the distribution halfwidth over the 0-0 frequencies for organic dye solutions have been discovered in the present work. The kinetic and polarization characteristics of flourescence from the viscous dipolar solutions of the dyes exhibiting dynamic inhomogeneous broadening upon excitation near the absorption band center have been studied. The objects of the study are rhodamine 6G solutions in glycerol and ethanol at the concentration 10/sup -//sub 6/ mole/liter. It was concluded that the presence of the dip in the flourescence lifetime and the hump in the fluorescence polarization dependences on emission wavelength in the viscous dipolar solution of rhodamine 6G has been detected. The phenomena have been explained by the formation of the excited-state nonequilibrium distribution of the flourescence centers over the 0-0 transition frequencies upon monochromatic excitation and by the subsequent relaxation of the nonequilibrium distribution into the equilibrium one.
Databáze:	OpenAIRE
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