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ISSUE 10

Year 2005, Month 10 (Section Full Articles, Page 2354)

Synthesis and studies of spectroscopic and electrochemical properties of dinuclear ruthenium(II) and manganese(II) complexes

T. N. Kropacheva (a), V. I. Kornev (a), D. A. Loginov (b), V. I. Meshcheryakov (b), E. V. Mutseneck (b), D. V. Muratov (b), D. S. Perekalin (b), L. S. Shul´pina (b), and A. R. Kudinov (b)

New dinuclear ruthenium manganese complexes of general composition (bpy)2Ru(L)MnClx(H2O)2 (L is 1,10-phenanthroline-5,6-dione, 3,3´-dicarboxy-2,2´-bipyridyl, or bis(pyrazolyl); x = 2 or 4) were synthesized by the reaction of (bpy)2Ru(L) with MnCl2•4H2O. These compounds and the starting mononuclear ruthenium complexes were studied by spectrophotometric and electrochemical methods in MeCN. The position of the charge-transfer band RuII → L in the spectra depends on the donor-acceptor characteristics of the ligand L. For the dinuclear complex under study, the formal potentials of reversible one-electron oxidation of RuII are in the range of 0.9—1.2 V (vs. the standard hydrogen electrode), whereas oxidation of MnII occurs at more positive (by 0.1—0.2 V) potentials.

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