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Creators/Authors contains: "Bunting, Philip C"

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  1. ; ; ; (, Chemical Science)
    The characteristic statistical response of superparamagnetic materials under magnetic stimuli provides quantitative insight into structure–function relationships, facilitating comparative data interpretation and paving the way for the design of superior functional materials. 
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  2. ; ; ; (, Chemistry of Materials)
  3. ; ; ; ; ; ; (, Journal of the American Chemical Society)
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  5. ; ; ; ; ; ; ; ; (, Inorganic Chemistry)
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  6. ; ; ; ; ; ; (, Chemical Communications)
    We report a rare example of a mixed-valence iron compound with an FeNNFe core, which gives insight into the structural, spectroscopic, and magnetic influences of single-electron reductions and oxidations. In the new compound, the odd electron is localized as judged from Mössbauer spectra at 80 K and infrared spectra at room temperature, and the backbonding into the N 2 unit is intermediate between diiron( i ) and diiron(0) congeners. Magnetic susceptibility and relaxation studies on the series of FeNNFe compounds show significant magnetic anisotropy, but through-barrier pathways enable fairly rapid magnetic relaxation. 
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  7. ; ; ; (, Physical Review D)
  8. ; ; ; ; ; ; ; ; ; (, Science)
    null (Ed.)
    Orbital angular momentum is a prerequisite for magnetic anisotropy, although in transition metal complexes it is typically quenched by the ligand field. By reducing the basicity of the carbon donor atoms in a pair of alkyl ligands, we synthesized a cobalt(II) dialkyl complex, Co(C(SiMe 2 ONaph) 3 ) 2 (where Me is methyl and Naph is a naphthyl group), wherein the ligand field is sufficiently weak that interelectron repulsion and spin-orbit coupling play a dominant role in determining the electronic ground state. Assignment of a non-Aufbau (d x 2 –y 2 , d xy ) 3 (d xz , d yz ) 3 (d z 2 ) 1 electron configuration is supported by dc magnetic susceptibility data, experimental charge density maps, and ab initio calculations. Variable-field far-infrared spectroscopy and ac magnetic susceptibility measurements further reveal slow magnetic relaxation via a 450–wave number magnetic excited state. 
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