Solid-State NMR of H3PW12O40·nH2O and H3PW12O40·6C2H5OH

Abstract

Abstract High-resolution solid-state 1H and 31P NMR revealed that there were at least three different states for protons of H3PW12O40·nH2O; (i) protons present in highly hydrated samples, (ii) protonated water which is hydrogen-bonded to terminal oxygen, W = O···H+ (H2O)2 (n \doteqdot 6), and (iii) proton which is directly bonded to bridging oxygen, W–OH–W (n \doteqdot 0). When water was replaced by ethanol, a protonated ethanol species was detected by 1H, 13C, and 31P NMR.