Luminescence quenching of [Os(bpy)3 ]2+by Mn7+, Cr6+and Ce4+ions in acidic aqueous solution
Ayman Abdel-Shafi;
Abstract
Luminescence quenching of [Os(bpy)3]2+by Mn7+, Cr6+and Ce4+ions in acidic aqueous media are studied. Ground state interactions between [Os(bpy)3]2+and these ions show ground state association with stoichiometric ratios in accordance with the electron transfer process. Positive deviation is observed from the linear Stern-Volmer relationship which with the ground state association is in support of static quenching mechanism. Benesi-HildEbrand equation was used to evaluate the association constant which were found to be 5×103M-1, 6.6×104M-1and be 1.1×105M-1for association of [Os(bpy)3]2+with Ce4+, Cr6+and Mn7+, respectively, based on luminescence intensity measurements. Different models for static luminescence quenching were employed to discuss the results. © 2014 Elsevier B.V.
Other data
Title | Luminescence quenching of [Os(bpy)<inf>3</inf>]<sup>2+</sup>by Mn<sup>7+</sup>, Cr<sup>6+</sup>and Ce<sup>4+</sup>ions in acidic aqueous solution | Authors | Ayman Abdel-Shafi | Issue Date | 1-Jan-2014 | Journal | Journal of Luminescence | DOI | https://api.elsevier.com/content/abstract/scopus_id/84905569013 282 155 10.1016/j.jlumin.2014.06.059 |
Scopus ID | 2-s2.0-84905569013 |
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