Preparation and characterization of mixed ammonium salts of Keggin phosphomolybdate

Keggin-type modified ammonium salts of molybdophosporic acid were prepared by partial substituting of the ammonium ions by X (X = SbIII, BiIII or SnII) ions. They were characterised by BET method, XRD, 31P NMR, UV–Vis, Raman, IR spectroscopies and thermal analysis (TG and DTA). It appeared that introducing an element X = Sb or Sn led to partially reduced compound corresponding to the electron exchange occurring between Sb(III) or Sn(II) and Mo(VI) without modification of Keggin structure.

Graphical abstractKeggin–type modified ammonium salts of molybdophosporic acid were prepared by partial substituting of the ammonium ions by X (X= SbIII, BiIII or SnII) ions. It appeared that introducing an element X= Sb or Sn led to partially reduced compound corresponding to the electron exchange occurring between Sb(III) or Sn(II) and Mo(VI) without modification of Keggin structure.Figure optionsDownload full-size imageDownload as PowerPoint slide