¹⁰⁷Ag and ¹⁰⁹Ag Nuclear Magnetic Resonance Studies of Ag⁺ Ions in Aqueous Solutions

Abstract

The NMR lines of 107Ag and 109Ag have been investigated in aqueous solutions of AgF, AgN03 , and AgC104 . The ratio of the Larmor frequencies of 109Ag and 107Ag has been measured in various samples: v (109Ag) jv (107Ag) =1.149 639 7 (8). No primary isotopic effect was to be detected within these limits of error (0.7 ppm). This ratio yields the hyperfine structure anomaly 107/j109 = -0.004127 7(7). The concentration dependence of the chemical shift of the 107Ag and 109Ag resonance frequencies was determined. Using this dependence, the ratios of the Larmor frequencies of the 107Ag and 109Ag nuclei for infinite dilution relative to the resonance frequency of 73Ge in GeCl4 are given. The magnetic moments of the 107Ag+ and 109Ag+ ions merely surrounded by water molecules are /*(107Ag+) = -0.113 045 3 (9) ^n and fi (109Ag+) = -0.129 961 5 (10) without dia magnetic corrections. These values are compared with the result of an atomic beam experiment, the difference of the moments is due to the shielding of the silver nuclei by water molecules around the ions. The shielding constant is a* (Ag+ in H20 vs. Ag atom) = -0.000 94 (17). Preliminary values of the relaxation times are given.

Homoleptic Copper(I) and Silver(I) Complexes with o-Phenylene-Backboned Bis(thioethers), Bis(selenoethers), and Bis(telluroethers): Synthesis, Multinuclear NMR Studies, and Crystal Structures of [Cu{o-C6H4(SeMe)2}2]PF6, [Cu{o-C6H4(TeMe)2}2]PF6, and [Agn{μ-o-C6H4(SeMe)2}n{o-C6H4Black1, Champness2, Levason3 et al. 1996Inorg. Chem.58180View full textAdd to dashboardCite

“…tubes. Spectra were recorded by direct observation from solutions containing the free radical relaxation agent TEMPO (TANOL) and with a 2 s pulse delay, typically 20 000 scans being accumulated. A 9.1 mol dm -3 solution of AgNO 3 in D 2 O containing Fe 3+ as relaxation agent was used as zero reference .…”

109Ag NMR-Studies of the Selective Solvation of the Ag+ -Ion in Water-Ethylamine-Mixtures and of the Coordination of Halide-Anions to the Silver-Ethylamine Solvate Complexes

“…The spin of this nucleus is 7=1/2 [6] and it has a relatively small magnetic moment ju = -0.129 961 5 (10)//N [3]. This yields a Larmor frequency vL( 109 Ag)^ 4.190 MHz in our field B0 = 2.114 T (corresponding to 90 MHz proton Larmor frequency).…”

“…Unfortunately the chemical shifts of these ligand protons are relatively small (some ppm), and thus information taken from such experiments is limited. In the last few years, however, special steady-state pulse techniques have become available and enabled systematic NMR investigations of the nuclei 107 Ag and 109 Ag [3,4]. The silver chemical shifts are found to be in the range of some hundreds of ppm and suggest investigations on the central atom of the solvate complex.…”

Mobility of Silver Ions in Silver Ion Conductor Ag7NbS6 Studied by Ag and Nb NMR

“…A Bruker MSL-400 NMR spectrometer (9.39 T) was used for most of the measurements. An aqueous solution of AgNO 3 with Fe(NO 3 ) 3 , was used as the reference material of the chemical shift of 109 Ag. T 1 of 109 Ag and 107 Ag were measured by the saturation recovery method, and T 1 of 93 Nb was measured by the inversion recovery (180°−τ−90°) method.…”