Two Hexa-Ni-Substituted AsW9O34 Clusters Functionalized by Organic Ligands

Bin Cai, Jun Wei Zhao*, Bai Feng Yang, Huan He, Guo Yu Yang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Hydrothermal reactions of trilacunary precursor A-α-AsW9O34 9- polyoxoanions and nickel ions in the presence of ethylenediamine (en = ethylenediamine) led to two new hexa-Ni-substituted Keggin-type tungstoarsenates [Ni63-OH)3(en)3(H2O)6(B-α-AsW9O34)]·6H2O (1) and [Ni63-OH)3(en)3(H2O)6(B-α-AsW9O34)]·10H2O (2), which have been characterized by elemental analyses, IR spectra, powder X-ray diffraction, thermogravimetric analyses and single-crystal X-ray diffraction. Crystal data for 1: hexagonal, R3c, a = b = 20.4379(5) Å, c = 21.5062(6) Å, β = 120o, V = 7779.8 (3) Å3 and Z = 6; for 2: momoclinic, P21/c, a = 13.4200(3) Å, b = 19.1428(5) Å, c = 22.8845(9) Å, β = 112.403(3)o, V = 5435.2(3) Å3 and Z = 4. Structural analyses reveal that the [Ni63-OH)3(B-α-AsW9O34)] clusters in 1 and 2 are covalently functionalized by neutral en ligands, in which two similar {Ni63-OH)3(en)3(H2O)6}9+ cores have been observed by our lab. Notably, 1 and 2 represent the highest number of substituted transition metal ions in all known lacunary Keggin-type polyoxotungstoarsenate monomers.

Original languageEnglish
Pages (from-to)1047-1059
Number of pages13
JournalJournal of Cluster Science
Volume25
Issue number4
DOIs
Publication statusPublished - Jul 2014

Keywords

  • Hydrothermal synthesis
  • Lacunary precursor
  • Organic functionalization
  • Substituted polyoxotungstoarsenate

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