Effects of structural order on magnetic properties of S = 1 [Ni(HF2)(pyz)2]PF6 (pyz = pyrazine)

POSTER

Abstract

We have discovered a third polymorph in the [Ni(HF2)(pyz)2]PF6 family of coordination polymers. As compared to the previously published structures that possess structurally ordered frameworks1, a new example features a disordered, monoclinic unit cell. This new variant allows us to examine the effects of structural order and disorder on superexchange pathways, specifically along the Ni-FHF-Ni and Ni-pyz-Ni directions. We consider the local distortions to the Ni(II) coordination sphere and the geometries afforded by the ligands. This presentation will address the possible discrepancies in magnetic properties for these polymorphs as gleaned by examination of their structures.

1Manson, et al. Inorg. Chem. 50, 5990 (2011)

Presenters

  • Ashley Glover

    Chemistry, Eastern Washington University

Authors

  • Ashley Glover

    Chemistry, Eastern Washington University

  • Jamie Manson

    Chemistry, Eastern Washington University, Dept. of Chemistry and Biochemistry, Eastern Washington University, Eastern Washington University, Department of Chemistry and Biochemistry, Eastern Washington University

  • Sam Curley

    Physics, University of Warwick, Warwick University

  • Robert Williams

    Physics, University of Warwick

  • Paul Goddard

    Physics, University of Warwick, Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom, Warwick University, Department of Physics, University of Warwick

  • John Singleton

    National High Magnetic Field Laboratory, Los Alamos National Laboratory, MPA-MAG, Los Alamos National Laboratory, National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545, Los Alamos National Laboratory, NHMFL, Los Alamos National Labs, NHMFL, Los Alamos National Laboratory, Los Alamos, National High Magnetic Field Laboratory, NHMFL, Los Alamos Natl Lab, Los Alamos Natl Lab

  • Saul H. Lapidus

    Advanced Photon Source, Argonne National Laboratory, X-ray Science Division, Argonne National Laboratory, Advanced Photon Source, Argonne Natl Lab

  • Roger Johnson

    University of Oxford, ISIS Pulsed Neutron Source, Rutherford Appleton Laboratory, Clarendon Laboratory, University of Oxford, Department of Physics, University of Oxford, Physics, University of Oxford

  • Pascal Manuel

    ISIS Pulsed Neutron Source, Rutherford Appleton Laboratory, ISIS Facility, STFC

  • Wei Zhou

    National Institute of Standards and Technology, NIST Center for Neutron Research

  • Jesper Bendix

    University of Copenhagen, Chemistry