2022/09/19 by Vladimir I. Bakhmutov, Aida Contreras‐Ramirez, Hannah Drake +2
Environmental Science · Chemistry · Materials Science · #Chemical Synthesis and Characterization #Advanced NMR Techniques and Applications #Crystal Structures and Properties
paper · doi:10.1002/mrc.5313
Abstract The phosphorus chemical shift anisotropies, 31 PΔcs, and asymmetry parameters η were measured by the 31 P 1 H NMR experiments in static and low‐frequency spinning samples of the zirconium phosphates and phosphonates and also in the mixed Zr (IV)/Sn (IV) phosphate/phosphonate material. The data obtained have shown a 111 connectivity in the HPO 4 and PO 3 groups, which does not change at modification and intercalation of the materials. The 31 PΔcs values of the phosphonate groups (43–49 ppm) significantly surpass the values characterizing the HPO 4 groups (23–37 ppm). The 31 P Δcs values obtained for the metal (IV) phosphates were discussed in terms of P‐O distances. The 31 P chemical shift anisotropy parameters can help at elucidation of local structures in phosphate and phosphonate materials.