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= Sb III, Bi III or Sn II) ions. It appeared that introducing an element X= Sb or Sn led to partially reduced compound corresponding to the electron exchange occurring betwe...

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Published inInorganica Chimica Acta Vol. 362; no. 11; pp. 3896 - 3900
Main Authors Dermeche, L., Thouvenot, R., Hocine, S., Rabia, C.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.08.2009
Subjects
Characterization
Keggin
Polyoxometalate
Spectroscopies
Characterization
Polyoxometalate
Spectroscopies
Keggin
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Summary:Keggin–type modified ammonium salts of molybdophosporic acid were prepared by partial substituting of the ammonium ions by X (X= Sb III, Bi III or Sn II) 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. Keggin-type modified ammonium salts of molybdophosporic acid were prepared by partial substituting of the ammonium ions by X (X = Sb III, Bi III or Sn II) 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.
ISSN:0020-1693
1873-3255
DOI:10.1016/j.ica.2009.04.049