High-resolution solid-state tin-119 nuclear magnetic resonance spectroscopy of ternary tin oxides

Abstract

A series of ternary tin oxides has been studied by high-resolution solid state ¹¹⁹Sn magic angle spinning n.m.r. spectroscopy. Linear correlations were observed between the ¹¹⁹Sn chemical shift and the cation radius in compounds of the type MSnO₃ and M₂SnO₄. Significant chemical shift anisotropies have been identified with bond-angle and bond-length distortions of the SnO₆octahedra present in these phases, although no straightforward relationship was seen between the chemical shift tensor asymmetry and the crystallographic site symmetry. Spin–spin coupling was observed in several compounds between chemically equivalent but magnetically inequivalent ¹¹⁹Sn and ¹¹⁷Sn nuclei separated by Sn–O–Sn bonds.