Chronoamperometric study and X-ray analysis of Ru(II)-pdto (1,8-bis-(2-pyridyl)-3,6-dithiaoctane) complexes with substituted 1,10-phenanthrolines
作者:Luis Ortiz-Frade、Juan Manríquez、Ignacio González、Lena Ruiz-Azura、Rafael Moreno-Esparza
DOI:10.1016/j.poly.2009.05.053
日期:2010.1
This work presents cyclic voltammetry and double potential step chronoamperometry experiments corresponding to the electrochemical reduction of the substituted 1,10-phenanthroline ligands in the coordination compounds [Ru(pdto)(1,10-phenanthroline)]Cl(2) (1), [Ru(pdto)(5,6-dimethyl-1,10-phenanthroline)]Cl(2) (2), [Ru(pdto)(4,7-diphenyl-1,10-phenanthroline)]Cl(2) (3), [Ru(pdto)(4,7-dimethyl-1,10-phenanthroline)]Cl(2) (4) and [Ru(pdto)(3,4,7,8-tetramethyl-1,10-phenanthroline)]Cl(2) (5). These studies were performed in order to evaluate the stability of the electrogenerated chemical species. An EC(i) mechanism for all the complexes was proposed and the rate constant value (k(1)) for the chemical coupled reaction was estimated. The stability is discussed in terms of the rate constant value (k(1)) and the pi*-acceptor properties. (C) 2009 Elsevier Ltd. All rights reserved.