Magnetic properties of hybrid organo-inorganic copper(II) oxovanadate(V) phosphate and phosphonate bridged systems

E. Spodine, D. Venegas-Yazigi, S. Ushak, V. Paredes-García, M. Saldias, E. Le Fur, J. Y. Pivan

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The hybrid organo-inorganic compounds [Cu4(bipy)4V4O11(PO4)2]nH2O (n ∼ 5) (1), [Cu2(phen)2(PO4)(H2PO4)2(VO2) · 2H2O] (2) and [Cu2(phen)2(O3PCH2PO3)(V2O5) (H2O)]H2O (3) which present different bridging forms of the phosphate/phosphonate group, show different bulk magnetic properties. We herein analyze the magnetic behaviour of these compounds in terms of their structural parameters. We also report a theoretical study for compound (1) assuming four different magnetic exchange pathways between the copper centres present in the tetranuclear unit. For compound (1) the following J values were obtained J1 = +3.29; J2 = -0.63; J3 = -2.23; J4 = -46.14 cm-1. Compound (2) presents a Curie-Weiss behaviour in the whole range of temperature (3-300 K), and compound (3) shows a maximum for the magnetic susceptibility at 64 K, typical for antiferromagnetic interactions. These data where fitted using a model previously reported in the literature, assuming two different magnetic exchange pathways between the four copper(II) centres, with J1 = -30.0 and J2 = -8.5 cm-1.

Original languageEnglish
Pages (from-to)2121-2125
Number of pages5
JournalPolyhedron
Volume26
Issue number9-11
DOIs
Publication statusPublished - 15 Jun 2007

Keywords

  • Copper(II)
  • DFT calculations
  • Magnetic properties
  • Organo-inorganic systems
  • Phosphate
  • Phosphonate

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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