Characterization of silver species: Locations and environments in A, X, and Y zeolites by electron spin echo spectroscopy

作者：Narendra Narayana, Larry Kevan · 发表于：The Journal of Chemical Physics · 年份：1982 · DOI：10.1063/1.443520 · 被引用次数：32 · 研究领域：Advanced NMR Techniques and Applications、NMR spectroscopy and applications、Zeolite Catalysis and Synthesis

Electron spin resonance and electron spin echo techniques are used to identify and characterize different types of isolated silver atoms observed on γ-irradiation of A, X, and Y zeolites. On the basis of 2D and 133Cs modulation analysis, the dominant species in A zeolites is located inside the β cage at a S2′ site and is coordinated to two waters. In X and Y zeolites, the Ag0 is found to be fully solvated by four waters and is located at the center of the β cage at site SU. Room temperature dehydration destroys the dominant species in A zeolites.