[Ag(OH₂)₂][Ag(SO₄)₂]: A Hydrate of a Silver(II) Salt

Abstract

When exposed to air at ambient conditions, AgSO slowly reacts with moisture, yielding AgSO ⋅H O. The crystal structure determination (powder data) shows that it may be described as [Ag(OH ) ][Ag(SO ) ], with some sulfate groups being shared between different Ag cations, resembling in that way its Cu analogue. [Ag(OH ) ][Ag(SO ) ], the first hydrate of a compound of Ag , was extensively characterized using many physicochemical methods.

Efficient Electrosynthesis of AgIISO4: A Powerful Oxidizer and Narrow Band Gap Semiconductor

“…X‐ray powder diffraction, thermogravimetric calorimetric analysis, and Raman scattering spectra confirmed that pure Ag II SO 4 was obtained (see the Supporting Information) , . The crystals were much larger (up to 250 µm in length) and much less water sensitive than those obtained by using chemical synthesis; indeed, electrochemically prepared AgSO 4 reacts very slowly with atmospheric moisture to yield a monohydrate, rather than immediately decomposing into Ag I HSO 4 , as is the case for chemically prepared samples.…”

New CuSO4‐related high‐temperature polymorph of AgIISO4**

“…The on‐site interactions were included for each of the elements with the Hubbard term U set 5 eV for Ag ( l= 2), 2 eV for S ( l= 1) and 4 eV for O ( l= 1), and exchange term J set equally for all the atoms (1 eV). A similar computational setup can be found in other studies of silver(II) sulfate and sulfate hydrate [13,15,20] . For the spin non‐polarized DFT single‐point calculations the k‐spacing was set to 0.15 Å −1 .…”

“…A similar computational setup can be found in other studies of silver(II) sulfate and sulfate hydrate. [13,15,20] For the spin non-polarized DFT single-point calculations the k-spacing was set to 0.15 Å À 1 . For the more resourcedemanding spin-polarized calculations with HSE06 hybrid functional, the k-spacing was set to 0.30 Å À 1 .…”

“…Novel Ag(II) compounds as well as most metal sulfates have been previously characterized by employing vibrational spectroscopy. [12,15,20,13,22,23] However, the amount of sample 1 allowed only for performing powder XRD measurements, and we faced difficulties in repeating synthesis. For this reason, spectral analyses were performed on sample 2, which consisted of 58.0(2)% β-AgSO 4 , and 42.0 (2)% α phase, as seen from Rietveld analysis (PXRD in Figure S7).…”

“…[11] This prediction was confirmed via the synthesis of silver(II) sulfate (labelled here as α-AgSO 4 ) and subsequently of its monohydrate derivative. [12,13] These studies encompassed synthetic methods, analysis of vibrational and EPR spectra, and magnetic susceptibility profiles. Subsequently, the reactivity of AgSO 4 was explored, including its strong one-electron oxidizing capability [14] which is essential in further applications of this compound in organic chemistry.…”