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Acidic Centers on the Surface of a Crystalline α-Sn(IV) Phosphate Characterized by the Solid-State H, H, P, and Sn MAS NMR Techniques. | LitMetric
A layered crystalline phosphate α-Sn(HPO)·HO (), prepared and characterized in the present study by the multinuclear solid-state nuclear magnetic resonance (NMR), powder X-ray diffraction, and thermogravimetric analysis techniques, was treated with DO and HOD imitating the reaction conditions in a water medium. The H solid-echo magic angle spinning NMR spectra of the products have revealed on their surface low mobile water molecules and hydronium ions, forming a structure close to the Zundel cation, [DO···D-OD]. All the deuterons in the hydronium ions are tangled by hydrogen bonds with the water and the surface phosphate groups and stabilized by ionic interactions.
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