Two-dimensional oxides constructed from octamolybdate clusters and M n+/tetrapyridylpyrazine subunits (M = Co, Ni: N = 2; M = Cu: N = 1)

Eric Burkholder, Jon A Zubieta

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19 Scopus citations


Hydrothermal methods have allowed the preparation of three two-dimensional materials constructed from octamolybdate clusters and secondary metal/tetra-2-pyridylpyrazine subunits. The δ-Mo8O264- cluster of [{Cu 2(tpyprz)} 2Mo 8O 26] is illustrated. The hydrothermal reactions of MoO 3, tetra-2- pyridylpyrazine (tpyprz) and M(CH 3CO 2) 2 • 2H 2O (M = Co, Ni) yielded the two-dimensional oxides [M 2(tpyprz)(H 2O) 2Mo 8O 26] • xH 2O [M = Co, x = 1.8 (1); M = Ni, x = 0.6 (2)]. However, the reaction of (NH 4) 6Mo 7O 24 • 4H 2O, tpyprz and Cu(CH 3CO 2) 2 • H 2O produced [{Cu 2(tpyprz)} 2Mo 8O 26] • 2H 2O (3 • 2H 2O). The isomorphous structures of 1 and 2 are constructed from α-Mo8O264- clusters linked through {M 2(tpyprz)(H 2O) 2} 4+ subunits into two-dimensional networks. While the structure of 3 is also two-dimensional, the molybdate building block is present as the δ-isomer and the secondary-metal/ligand component consists of a one-dimensional {Cu2(tpyprz)}n2n+ chain. The structure of 3 is compared to that of the previously reported three-dimensional material [{Cu 2(tpyprz)} 2Mo 8O 26] • 7H 2O which contains ζ-Mo8O264-clusters and structurally distinct {Cu2(tpyprz)}n2n+ chains.

Original languageEnglish (US)
Pages (from-to)116-122
Number of pages7
JournalInorganica Chimica Acta
Issue number1
StatePublished - Jan 1 2005



  • Bimetallic oxides
  • Metal-organic framework
  • Octamolybdate
  • Polyoxometalate building blocks

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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