Effect of Applied Hydrostatic Pressure on the Enantioselective Quenching of the Luminescence from rac-Tris(2,6-pyridinedicarboxylate)terbium(III) by Resolved Tris(1,10-phenanthroline)ruthenium(II) in Water and Methanol

Autor:	Stefan C. J. Meskers, Harry P. J. M. Dekkers, Christine L. Maupin, James P. Riehl
Rok vydání:	1998
Předmět:	Tris chemistry.chemical_compound Quenching (fluorescence) chemistry Phenanthroline Hydrostatic pressure Solvation chemistry.chemical_element Terbium Physical and Theoretical Chemistry Luminescence Photochemistry Ruthenium
Zdroj:	The Journal of Physical Chemistry A. 102:4450-4455
ISSN:	1520-5215 1089-5639
Popis:	The effect of applied hydrostatic pressure on the enantioselective excited-state quenching of rac-tris(2,6-pyridinedicarboxylate)terbium(III) [Tb(DPA)33-] by optically active tris(1,10-phenanthroline)ruthenium(II) [Ru(phen)32+] is presented. The time dependence of the excited-state luminescence is analyzed in terms of a biexponential decay at pressures from 1 bar to 3 kbar corresponding to the diastereomeric (Δ−Δ and Δ−Λ) quenching reactions. In water solution it is found that the diastereomeric quenching rates and enantioselectivity increase with pressure, while in methanol solution the quenching rates and enantioselectivity decrease. The results are interpreted in terms of a detailed model for the quenching involving solvation effects within the diastereomeric encounter complexes.
Databáze:	OpenAIRE
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