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• W3017717048 endingPage "12784" @default.
• W3017717048 startingPage "12769" @default.
• W3017717048 abstract "Abstract Previously reported ferromagnetic triangles (N n Bu 4 ) 2 [Cu 3 ( μ 3 ‐Cl) 2 ( μ ‐4‐NO 2 ‐pz) 3 Cl 3 ] ( 1 ), (PPN) 2 [Cu 3 ( μ 3 ‐Cl) 2 ( μ ‐pz) 3 Cl 3 ] ( 2 ), (bmim) 2 [Cu 3 ( μ 3 ‐Cl) 2 ( μ ‐pz) 3 Cl 3 ] ( 3 ) and newly reported (PPh 4 ) 2 [Cu 3 ( μ 3 ‐Cl) 2 ( μ ‐4‐Ph‐pz) 3 Cl 3 ] ( 4 ) were studied by magnetic susceptometry, electron paramagnetic resonance (EPR) spectroscopy and ab initio calculations to assess the origins of their ferromagnetism and of the magnetic anisotropy of their ground S= 3/2 state (PPN + =bis(triphenylphosphine)iminium, bmim + =1‐butyl‐3‐methylbenzimidazolium, pz − =pyrazolate). Ab initio studies revealed the d character of the magnetic orbitals of the compressed trigonal bipyramidal copper(II) ions. Ferromagnetic interactions were attributed to weak orbital overlap via the pyrazolate bridges. From the wavefunctions expansions, the ratios of the magnetic couplings were determined, which were indeterminate by magnetic susceptometry. Single‐crystal EPR studies of 1 were carried out to extend the spin Hamiltonian with terms which induce zero‐field splitting (zfs), namely dipolar interactions, anisotropic exchange and Dzyaloshinskii–Moriya interactions (DMI). The data were treated through both a giant‐spin model and through a multispin exchange‐coupled model. The latter indicated that ≈62 % of the zfs is due to anisotropic and ≈38 % due to dipolar interactions. The powder EPR data of all complexes were fitted to a simplified form of the multispin model and the anisotropic and dipolar contributions to the ground state zfs were estimated." @default.
• W3017717048 created "2020-05-01" @default.
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• W3017717048 date "2020-09-04" @default.
• W3017717048 modified "2023-10-18" @default.
• W3017717048 title "Origin of Ferromagnetism and Magnetic Anisotropy in a Family of Copper(II) Triangles" @default.
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• W3017717048 doi "https://doi.org/10.1002/chem.202001028" @default.
• W3017717048 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32343007" @default.
• W3017717048 hasPublicationYear "2020" @default.
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