Combinatorial characterization of metastable luminous silver cations.

ABSTRACT: Thermodynamically metastable glasses that can contain metastable species are important functional materials. X-ray absorption near-edge structure (XANES) spectroscopy is an effective technique for determining the valence states of cations, especially for the doping element in phosphors. Herein, we first confirm the valence change of silver cations from monovalent to trivalent in aluminophosphate glasses by X-ray irradiation using a combination of Ag L₃-edge XANES, electron spin resonance, and simulated XANES spectra based on first-principles calculations. The absorption edge of the experimental and simulated XANES spectra demonstrate the spectral features of Ag(III), confirming that AgO exists as Ag(I)Ag(III)O₂. A part of Ag(I) changes to Ag(III) by X-ray irradiation,

SUBMITTER: Masai H 

PROVIDER: S-EPMC10897463 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature