Valence levels of Ru(II) complexes studied by cyclic voltammetry and X-ray photoelectron spectroscopy
1979; Elsevier BV; Volume: 102; Issue: 1 Linguagem: Inglês
10.1016/s0022-0728(79)80037-6
ISSN2590-2954
AutoresTakeko Matsumura-Inoue, Isao Ikemoto, Yoshio Umezawa,
Tópico(s)Magnetism in coordination complexes
ResumoThe correlation between the oxidation potentials for a reversible one-electron process and the valence level binding energies measured by X-ray photoelectron spectroscopy was examined with a series of M2L2X2(2+n)+ (ML2+3) complexes (M = Ru or OS, L = 2,2′-bipyridine or 1,10-phenanthroline, X2 = (py)2, (NH3)2, (NO−2)2, (CN−)2, etc). The oxidation peak potentials of these complexes varied proportionally with the energies of the lowest charge-transfer bands of the complexes. Linear correlations were obtained between the oxidation peak potentials, Ep,ox, and the valence level binding energies, ΔEv, of X-ray photoelectron spectroscopy. The slopes, −ΔEV/Ep,ox, are smaller than unity, indicating that the ligand's effect on the metal centre of the complex is weakened by the electrostatic interaction in the solid phase.
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