Temperature effects on the quenching of the 5D0				→				7F2 emission of Eu(6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionate)3 by a Cu(II) macrocycle

Ezequiel Wolcan; Laura Villata; Alberto L. Capparelli; Mario R. Féliz

doi:10.1039/B309582G

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Temperature effects on the quenching of the ⁵D₀ → ⁷F₂ emission of Eu(6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionate)₃ by a Cu(ii) macrocycle

Ezequiel Wolcan,*^a Laura Villata,^a Alberto L. Capparelli^a and Mario R. Féliz^a

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* Corresponding authors

^a Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Casilla de Correo 16, Sucursal 4, 1900 La Plata, Argentina
E-mail: ewolcan@inifta.unlp.edu.ar

Abstract

Luminescence quenching of Eu(fod)₃ (fod = 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionate) by a Cu(II) macrocycle was studied at 25, 35 and 45 °C by steady-state and flash luminescence techniques, varying the Cu(II) concentration between 0.2 and 20 mM. Experimental variation of the observed rate constant with the quencher concentration is rationalized in terms of a mechanism involving the quenching of two unequilibrated species by the Cu(II) macrocycle.

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Article information

DOI: https://doi.org/10.1039/B309582G
Article type: Paper
Submitted: 12 Aug 2003
Accepted: 25 Nov 2003
First published: 24 Dec 2003

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Photochem. Photobiol. Sci., 2004,3, 322-327

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Temperature effects on the quenching of the ⁵D₀ → ⁷F₂ emission of Eu(6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionate)₃ by a Cu(II) macrocycle

E. Wolcan, L. Villata, A. L. Capparelli and M. R. Féliz, Photochem. Photobiol. Sci., 2004, 3, 322 DOI: 10.1039/B309582G

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Photochemical & Photobiological Sciences