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Synthesis, structure and magnetic properties of the polyoxovanadate cluster [Zn2(NH2(CH2)2NH2)5][{Zn(NH2(CH2)2NH2)2}2{V18O42(H2O)}].xH2O (x ∼ 12), possessing a layered structure].xH2O (x ∼ 12), possessing a layered structure

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Abstract

A hydrothermal reaction of a mixture of ZnCl2, V2O5, ethylenediamine and water gave rise to a layered poly oxovanadate material [Zn2(NH2(CH2)2NH2)5][{Zn(NH2(CH2)2NH2)2}5{V18O42(H2O)}].xH2O (x ∼ 12) (I) consisting of [V18O42]12− clusters. These clusters, with all the vanadium ions in the +4 state, are connected together through Zn(NH2(CH2)2NH2)2 linkers forming a two-dimensional structure. The layers are also separated by distorted trigonal bipyramidal [Zn2(NH2(CH2)2NH2)5] complexes. The structure, thus, presents a dual role for the Zn-ethyl-enediamine complex. The magnetic susceptibility studies indicate that the interactions between the V centres inI are predominantly antiferromagnetic in nature and the compound shows highly frustrated behaviour. The magnetic properties are compared to the theoretical calculations based on the Heisenberg model, in addition to correlating to the structure. Crystal data for the complexes are presented.

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Authors and Affiliations

  1. Framework Solids Laboratory, Solid State and Structural Chemistry Unit, Indian Institute of Science, 560 012, Bangalore

    Srinivasan Natarajan

  2. Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur PO, 560 064, Bangalore

    K. S. Narayan

  3. Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur PO, 560 064, Bangalore

    Swapan K. Pati

Authors
  1. Srinivasan Natarajan
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  2. K. S. Narayan
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  3. Swapan K. Pati
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Correspondence to Srinivasan Natarajan.

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Dedicated to Prof J Gopalakrishnan on his 62nd birthday.

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Natarajan, S., Narayan, K.S. & Pati, S.K. Synthesis, structure and magnetic properties of the polyoxovanadate cluster [Zn2(NH2(CH2)2NH2)5][{Zn(NH2(CH2)2NH2)2}2{V18O42(H2O)}].xH2O (x ∼ 12), possessing a layered structure].xH2O (x ∼ 12), possessing a layered structure. J Chem Sci 118, 57–65 (2006). https://doi.org/10.1007/BF02708766

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