Preparation and characterization of mixed ammonium salts of Keggin phosphomolybdate |
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Authors: | L Dermeche S Hocine |
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Institution: | a Laboratoire de Chimie du Gaz Naturel, Faculté de Chimie, BP32, El-Alia, 16111 Bab-Ezzouar, Alger, Algeria b Laboratoire de Chimie Inorganique et Matériaux Moléculaires, Université Pierre et Marie Curie, 4, Place Jussieu, 75252 Paris Cedex 05, France |
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Abstract: | 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. |
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Keywords: | Polyoxometalate Keggin Spectroscopies Characterization |
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