Synthesis and Characterization of Vanadyl Phosphite, V^IVOHP^IIIO₃•1.5H₂O

Vanadyl(IV) phosphite, VOHPO₃•1.5H₂O, was synthesized by reduction of V₂O₅ in refluxing alcohol solutions (ethyl, isopropyl, and isobutyl alcohols) with subsequent addition of H₃-PO₃. X-ray diffraction suggests an orthorhombic space group. Magnetic susceptibility data indicate the presence of exchange coupled vanadyl dimers associated with face-shared vanadyl octahedra similar to vanadyl hydrogen phosphate hemihydrate, VOHPO₄•0.5H₂O. Vanadyl(IV) phosphite is a layered solid with an interlayer spacing of 7.27 Å. n-Alkylamines intercalated into the layered structure as single or double layers depending on the amineto-host ratio, and the interlayer spacings, d (Å), increased linearly with the carbon number, n_c, as d = 7.72 + 0.85n_c (monolayers), and d = 6.49 + 1.82n_c (bilayers).