Issue 2, 2001

Enhanced chemical reactivity of the tris-(2,2′-bipyridyl)ruthenium(II) complex due to electrostatic binding to colloidal particles as evidenced on the basis of the reaction with azidyl radicals

Abstract

Ion binding of Ru(bpy)32+ ions to negatively charged colloidal particles (silica or titania) or poly(vinyl sulfate) ions causes a pronounced reactivity increase. Respective evidence comes from the fact that the otherwise unreactive Ru(II) ions react with azidyl radicals (N3) provided they are firmly attached to the negatively charged particles. The increase in reactivity is explained in terms of strong electronic coupling between the Ru(II) complex and the host particle. As a consequence the oxidation potential of the system Ru(bpy)33+/Ru(bpy)32+ is significantly reduced.

Article information

Article type
Paper
Submitted
22 Sep 2000
Accepted
28 Nov 2000
First published
20 Dec 2000

Phys. Chem. Chem. Phys., 2001,3, 213-217

Enhanced chemical reactivity of the tris-(2,2′-bipyridyl)ruthenium(II) complex due to electrostatic binding to colloidal particles as evidenced on the basis of the reaction with azidyl radicals

A. Eckhart, A. Chemseddine, T. Moritz, D. B. Naik and W. Schnabel, Phys. Chem. Chem. Phys., 2001, 3, 213 DOI: 10.1039/B007719O

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