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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/124/06/1275-1286

    • Keywords

       

      Phosphomolybdate cluster; supramolecular interaction; hydrothermal synthesis.

    • Abstract

       

      The paper reports the synthesis and structural characterization of several organic-inorganic solids involving phosphomolybdate clusters. The Strandberg-type {P2Mo$^{\text{VI}}_5$O23} and the lower-valent {P4Mo$^V_6$O31} cluster based solids were isolated in the presence of $en$ (ethylenediamine) by controlling pH of the reaction medium. The lower-valent cluster invariably requires the presence of a suitable metal cation for further stabilization. A detailed investigation of the system was carried out where three different weak acids viz. oxalic acid, succinic acid and glycine were used in the entire pH range (1-12). Our results establish that the organic amine ($en$) is alone capable of reducing the molybdenum core in the absence of an organic acid at a suitable pH. Hence, pH of the reaction medium combined with suitable temperature favours the formation of lower-valent phosphomolybdate cluster. Higher pH favours the precipitation of a new sodium hydrogen phosphate.

    • Author Affiliations

       

      Minakshi Asnani1 Dinesh Kumar1 T Duraisamy1 Arunachalam Ramanan1

      1. Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
    • Dates

       
    • Supplementary Material

       
  • Journal of Chemical Sciences | News

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