Solid-state tellurium-125 nuclear magnetic resonance studies of transition-metal ditellurides †

Abstract

Solid-state 125Te NMR studies of inorganic compounds containing tellurium in oxidations states ranging from –II to VI have been made. The chemical shift tensors of Te(OH)6, TeCl4, TeO2 and elemental tellurium have been determined by simulation of magic angle spinning (MAS) NMR spectra. Binary transition-metal ditellurides have been studied by MAS and static 125Te NMR techniques. The observed MTe2 NMR shifts range from ca. 500 to 8000 ppm [from aqueous Te(OH)6] and are shown to be correlated with the expected tellurium oxidation state. Separation of the chemical shift and Knight shift contributions has been attempted.