Synthesis, structure and magnetism of the mixed-valent phosphonate cage, [MnIIMnIII12 (μ4 -O) 6 (μ-OH)6 (O3 P-t-Bu)10 (OH 2 )2 (DMF)4 ]·[2MeOH·4DMF]
Polyhedron 72 (2014) 35-42
Abstract:
The reaction of MnCl2·4H2O with t-BuPO 3H2 in the presence of triethylamine afforded the tridecanuclear cage, [MnIIMnIII12(μ 4-O)6(μ-OH)6(O3P-t-Bu) 10(OH2)2(DMF)4] ·[2MeOH·4DMF] (1). The structural analysis of 1 reveals that it is a mixed-valent complex containing a [MnIIMnIII12(μ4-O)6] core. The centre of the core is occupied by a MnII ion which is surrounded by 12 MnIII ions. The latter are connected to each other by six μ-OH- and 10 t-BuPO32- ligands. The vacant coordination sites of six MnIII ions situated in the periphery are occupied by four DMF and two water molecules. Magnetic studies on 1 reveal a frequency-dependent response which is characteristic of single-molecule magnets. © 2014 Elsevier Ltd. All rights reserved.A Microscopic and Spectroscopic View of Quantum Tunneling of Magnetization
Chapter in Molecular Magnets, Springer Nature (2014) 77-110
Quantifying magnetic exchange in doubly-bridged Cu-X2 -Cu (X = F, Cl, Br) chains enabled by solid state synthesis of CuF2 (pyrazine)
Chemical Communications 49:34 (2013) 3558-3560
Abstract:
Solid state techniques involving pressure and temperature have been used to synthesize the fluoride member of the CuX2(pyrazine) (X = F, Cl, Br) family of coordination polymers that cannot be crystallized by solution methods. CuF2(pyrazine) exhibits unique trans doubly-bridged Cu-F2-Cu chains that provide an opportunity to quantify magnetic superexchange in an isostructural Cu-X2-Cu series. © 2013 The Royal Society of Chemistry.Giant Ising-Type Magnetic Anisotropy in Trigonal Bipyramidal Ni(II) Complexes: Experiment and Theory
Journal of the American Chemical Society American Chemical Society (ACS) 135:8 (2013) 3017-3026
Elucidating Magnetic Exchange and Anisotropy in Weakly Coupled MnIII Dimers
Inorganic Chemistry American Chemical Society (ACS) 52:2 (2013) 718-723