Paramagnetic Resonance of Some Silver (II) Compounds

Abstract

Electron paramagnetic resonance field-modulation eddy-current analysis of silver-plated graphite resonators Rev. Sci. Instrum. 76, 094702 (2005);The electron paramagnetic resonance of acidic solutions of silver (n) and several silver (n) solid complex compounds has been investigated. In all cases a strong g anistropy permitted the evaluation of the principal g values. In two cases, the hyperfine splitting could be measured without ambiguity. Parallel measurements of the optical and ultraviolet absorption in the case of silver (n) solutions indicated that the hole is not localized on the paramagnetic ion.

The kinetics and mechanism of photo-assisted Ag(i)-catalysed water oxidation with S2O82−

“…This demonstrates House's speculation, in which it is considered that the complex should be formed in an initial step of the catalytic oxidation reaction of Ag + ions.The ESR spectrum of the solution of Na 2 S 2 O 8 and AgNO 3 at 100 K is shown in Fig.6. It consists of three broad lines, and the anisotropic hyperfine splitting (A ⊥ ) is 29.6 G, which is in good agreement with those of the Ag 2+ ions [45][46][47]. This result confirms the existence of Ag(II) ions in the process of Ag(I)-catalysed water oxidation.…”

The Early Years of 2,2′-Bipyridine—A Ligand in Its Own Lifetime

“…In [Ag(bpy) 2 ](NO 3 ) 2 ⋅H 2 O, there are also longer Ag...O interactions to oxygen atoms of nitrate anions at > 2.8 Å. The nature of the claimed [Ag(bpy) 3 ] 2+ species is less clear; although magnetic [243,247], electron paramagnetic resonance [248] and electronic spectra [249] have been reported, the existence of these compounds has been cast in doubt [250], and to date only the [Ag(bpy) 2 ] 2+ compounds have been established unequivocally. Magnetic data were also reported for compounds [Ag(bpy) 2 ](S 2 O 8 ) and {Ag 2 (bpy) 5 (S 2 O 8 ) 2 } [243].…”

SrAgTiO (, 0.1) perovskite-structured catalysts for the flameless combustion of methane

“…Though relatively few papers only have been published up to date on Ag 2+ species, due to the difficult stabilisation of such an oxidation state, an EPR spectrum practically identical to those of Fig. 6 has been observed since 1961 with Ag 2+ in frozen solutions of HNO3 or H2SO4 [43]. Ag 2+ EPR spectra of this kind have been reported also with Ag(SO3F)2 [44,45], with AgMF6 (M = Sn, Pb, Hf, Zr) and with MAgF4 (M = Ba, Ca, Hg, Sr), in which Ag 2+ centres were in either axially elongated tetragonal or in squareplanar arrangements [46,47].…”