Jump to main content
Jump to site search

Issue 35, 2014
Previous Article Next Article

Linking Cr3 triangles through phosphonates and lanthanides: synthetic, structural, magnetic and EPR studies

Author affiliations

Abstract

The preparation and structural characterisation of five 3d–4f mixed metal phosphonate cages with general formula [CrIII6LnIII23-O)2(H2O)2(O3PtBu)4(O2CtBu)12(HOiBu)2(iPrNH2)2] where LnIII = La, 1; Tb, 3; Dy, 4; Ho, 5 and [CrIII6GdIII23-O)2(H2O)2(O3PtBu)4(O2CtBu)12(HOiBu)4] (2) are reported. The structure contains two oxo-centred {Cr3} triangles, bridged by phosphonates and lanthanides. The magnetic behaviour of 1 has been modelled as two non-interacting isosceles triangles, involving two antiferromagnetic interactions (J1 = −8.8 cm−1) with a smaller ferromagnetic interaction for the unique edge of the triangle (J2 = +1.3 cm−1) giving an isolated S = 3/2 ground state per triangle. The quartet ground state has been proven through simulation of electron paramagnetic resonance (EPR) spectra obtained at the X- and Q-band. EPR simulations have also resulted in the introduction of small single-ion Zero Field Splitting (ZFS) parameters D = ±0.19 cm−1 and rhombic term E = ±0.02 cm−1, which are consistent with strong exchange limit calculations for an isolated S = 3/2 (D = ±0.22 and E = ±0.018 cm−1).

Graphical abstract: Linking Cr3 triangles through phosphonates and lanthanides: synthetic, structural, magnetic and EPR studies

Back to tab navigation

Supplementary files

Publication details

The article was received on 29 Apr 2014, accepted on 18 Jul 2014 and first published on 29 Jul 2014


Article type: Paper
DOI: 10.1039/C4DT01264J
Author version available: Download Author version (PDF)
Citation: Dalton Trans., 2014,43, 13242-13249
  •   Request permissions

    Linking Cr3 triangles through phosphonates and lanthanides: synthetic, structural, magnetic and EPR studies

    K. H. Zangana, E. M. Pineda, I. J. Vitorica-Yrezabal, E. J. L. McInnes and R. E. P. Winpenny, Dalton Trans., 2014, 43, 13242
    DOI: 10.1039/C4DT01264J

Search articles by author

Spotlight

Advertisements