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Combined high-resolution XPS and EXAFS study of Ag photodissolution in a-As2S3 thin film

“…3c) contain two distinct features which could be associated with Ag-Ag and Ag-S correlations. According to Gromilov et al [24], the shift of the Ag-Ag peak position to higher distances (∼3.05-3.10 Å) is connected with the interaction between Ag + ions, which in our case are formed by X-ray and photoionization of silver atoms. With light irradiation the height of both peaks decreases, especially for the Ag-Ag peak.…”

Crystal structure of silver and barium nitropalladates

“…The structure of K 2 [Pd(NO 2 ) 4 ] was refined in 1991 by the researchers from Scotland [2]. Later, a group of researchers from the Institute of Inorganic Chemistry of the Siberian Branch of the RAS characterized the structure of tetranitropalladates with other alkali metal cations: Li [3], Na [4], Rb [5], and Cs [6]. Furthermore, it was found that in the Na 2 [Pd(NO 2 ) 4 ]-NaNO 2 system at a stoichiometric excess of sodium nitrite, the Na 2 [Pd(NO 2 ) 4 ]⋅NaNO 2 mixed-salt phase formed [7].…”

New polar crystal of the pyridinium betaine salt

“…The pyridinium betaine shows a large negative solvatochromic effect [1][2] and the main aim of our work was to introduce the molecule into an acid framework to obtain polar crystals suitable for nonlinear optics.Colourless crystals were obtained by slow evaporation from ethanol solution of the betaine dye and phenylphosphinic acid in molar ratio 1:4. The structure shows polar symmetry (space group Pna2 1 ) with a = 29.4720 (1) Direct methods was used to solve the structure and refinement by full matrix least-squares on F 2 was converged at R 1 = 0.070, wR 2 = 0.183, S= 1.002 for 7037 unique reflections with Fo > 4s(Fo).…”

“…The pyridinium betaine shows a large negative solvatochromic effect [1][2] and the main aim of our work was to introduce the molecule into an acid framework to obtain polar crystals suitable for nonlinear optics.…”

“…The pyridinium betaine shows a large negative solvatochromic effect [1][2] and the main aim of our work was to introduce the molecule into an acid framework to obtain polar crystals suitable for nonlinear optics. Presented crystal structure is interesting because it lacks the crystallographic inversion centre which is not typical for salts of such a type.…”