Synthesis of new types of polyoxometallate pillared anionic clays: 31P and 27Al MAS NMR study of the orientation of intercalated PW11VO40 4?

A series of different new types of polyoxometallate pillared anionic clays are synthesized by ion-exchange reactions and characterized by elemental analysis, powder X-ray diffraction and IR spectroscopy; the observation of two 31P MAS NMR peaks for ZnAl–PW11VO40 provides experimental evidence for the orientation of the intercalated polyoxometallates with the C2 axis predicted to be orthogonal to the layers.