High-Field EPR Investigation and Detailed Modeling of the Magnetoanisotropy Tensor of an Unusual Mixed-Valent MnIV2MnIII2MnII Cluster

Wang, Xiaoling; Hale, Ashlyn R.; Hill, Stephen; Christou, George

doi:10.1007/s00723-022-01517-4

Appl Magn Reson

2022

DOI: 10.1007/s00723-022-01517-4

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High-Field EPR Investigation and Detailed Modeling of the Magnetoanisotropy Tensor of an Unusual Mixed-Valent MnIV2MnIII2MnII Cluster

Xiaoling Wang

Ashlyn R. Hale

Stephen Hill

et al.

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2024

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Cited by 2 publications

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Ferromagnetic Exchange and Slow Magnetic Relaxation in Cobalt Bis(1,2-dithiolene)-Bridged Dilanthanide Complexes

Vincent,

Lubert-Perquel,

Hill

et al. 2024

Inorg. Chem.

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The construction of multinuclear lanthanide-based molecules with significant magnetic exchange interactions represents a key challenge in the realization of single-molecule magnets with high operating temperatures. Here, we report the synthesis and magnetic characterization of two series of heterobimetallic compounds, (Cp* 2 Ln) 2 (μ-Co(pdt) 2 ) (Ln = Y 3+ , Gd 3+ , Dy 3+ ; pdt 2− = 1,2-diphenylethylenedithiolate) and [K(18-crown-6)][(Cp* 2 Ln) 2 (μ-Co(pdt) 2 )] (Ln = Y 3+ , Gd 3+ ), featuring two lanthanide centers bridged by a cobalt bis(1,2dithiolene) complex. Dc magnetic susceptibility data collected for the Gd congeners indicate significant Gd−Co ferromagnetic exchange interactions with fits affording J = +11.5 and +7.33 cm −1 , respectively. Magnetization decay and ac magnetic susceptibility measurements carried out on the single-molecule magnet (Cp* 2 Dy) 2 (μ-Co(pdt) 2 ) reveal full suppression of quantum tunneling and open-loop hysteresis persisting up to 3.5 K. These results, along with those of high-field EPR spectroscopy, suggest that transition metalloligands can enforce strong exchange interactions with adjacent lanthanide centers while maintaining a geometry that preserves molecular anisotropy. Furthermore, the magnetic properties of [K(18-crown-6)][(Cp* 2 Gd) 2 (μ-Co(pdt) 2 )] show that increasing the spin of the ground state of the bridging complex may be a viable alternative to increasing J in obtaining well-isolated, strongly coupled magnetic ground states.

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Ferromagnetic Exchange and Slow Magnetic Relaxation in Cobalt Bis(1,2-dithiolene)-Bridged Dilanthanide Complexes

Vincent,

Lubert-Perquel,

Hill

et al. 2024

Inorg. Chem.

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The synthesis and structures of four new copper(II) adamantoid clusters

Turnbull,

Mukda,

Dickie

et al. 2024

Journal of Coordination Chemistry

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High-Field EPR Investigation and Detailed Modeling of the Magnetoanisotropy Tensor of an Unusual Mixed-Valent MnIV2MnIII2MnII Cluster

Cited by 2 publications

References 78 publications

Ferromagnetic Exchange and Slow Magnetic Relaxation in Cobalt Bis(1,2-dithiolene)-Bridged Dilanthanide Complexes

Ferromagnetic Exchange and Slow Magnetic Relaxation in Cobalt Bis(1,2-dithiolene)-Bridged Dilanthanide Complexes

The synthesis and structures of four new copper(II) adamantoid clusters

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