The solvent effect in an axially symmetric Fe<sup>III</sup><sub>4</sub> single-molecule magnet

Zhu, Yuan‐Yuan; Yin, Tingting; Jiang, Shang‐Da; Barra, Anne‐Laure; Wernsdorfer, Wolfgang; Neugebauer, Petr; Marx, Raphael; Dörfel, María; Wang, Bing‐Wu; Wu, Zong‐Quan; Slageren, Joris van; Gao, Song

doi:10.1039/c4cc07580c

Cited by 21 publications

(7 citation statements)

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“…The relative abundance of these conformations can be calculated by assuming statistical distribution based on occupancy factors, so that only a fraction (31%) of the molecules are strictly tetragonal (Table ). This symmetry-lowering may have important consequences in determining the magnetic behavior at low temperature (vide infra). − …”

Section: Resultsmentioning

confidence: 99%

Magnetic Anisotropy of Tetrahedral Co^II Single-Ion Magnets: Solid-State Effects

et al. 2016

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This study reports the static and dynamic magnetic characterization of two mononuclear tetrahedral Co complexes, [Co{PrP(E)NP(E)Pr}], where E = S (CoS) and Se (CoSe), which behave as single-ion magnets (SIMs). Low-temperature (15 K) single-crystal X-ray diffraction studies point out that the two complexes exhibit similar structural features in their first coordination sphere, but a disordered peripheral Pr group is observed only in CoS. Although the latter complex crystallizes in an axial space group, the observed structural disorder leads to larger transverse magnetic anisotropy for the majority of the molecules compared to CoSe, as confirmed by electron paramagnetic resonance spectroscopy. Static magnetic characterization indicates that both CoS and CoSe show easy-axis anisotropy, with comparable D values (∼-30 cm). Moreover, alternating-current susceptibility measurements on these Co complexes, magnetically diluted in their isostructural Zn analogues, highlight the role of dipolar magnetic coupling in the mechanism of magnetization reversal. In addition, our findings suggest that, despite their similar anisotropic features, CoS and CoSe relax magnetically via different processes. This work provides experimental evidence that solid-state effects may affect the magnetic behavior of SIMs.

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Section: Resultsmentioning

confidence: 99%

Magnetic Anisotropy of Tetrahedral Co^II Single-Ion Magnets: Solid-State Effects

et al. 2016

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“…All reactions were carried out under aerobic condition. The synthesis procedure of the Schiff base ligands was described in our previous paper. , …”

Section: Methodsmentioning

confidence: 99%

A Family of Co^IICo^III₃ Single-Ion Magnets with Zero-Field Slow Magnetic Relaxation: Fine Tuning of Energy Barrier by Remote Substituent and Counter Cation

et al. 2015

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The synthesis, structures, and magnetic properties of a family of air-stable star-shaped Co(II)Co(III)3 complexes were investigated. These complexes contain only one paramagnetic Co(II) ion with the approximate D3 coordination environment in the center and three diamagnetic Co(III) ions in the peripheral. Magnetic studies show their slow magnetic relaxation in the absence of an applied dc field, which is characteristic behavior of single-molecule magnets (SMMs), caused by the individual Co(II) ion with approximate D3 symmetry in the center. Most importantly, it was demonstrated that the anisotropy energy barrier can be finely tuned by the periphery substituent of the ligand and the countercation. The anisotropy energy barrier can be increased significantly from 38 K to 147 K.

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“…Homoleptic tetrairon(III) propellers have formula [Fe 4 L 6 ], where H 2 L is a polydentate ligand containing a chelating pocket for the peripheral ions and an alkoxido or phenoxido bridging group . They normally crystallize as 1:1 mixtures of Λ and Δ propeller isomers (but see ref .…”

Section: Chemistry Of Fe4 and Related Complexesmentioning

confidence: 99%

“…They normally crystallize as 1:1 mixtures of Λ and Δ propeller isomers (but see ref . for an interesting case of spontaneous resolution) and their isolation in enantiopure form requires homochiral H 2 L ligands . Very recently a structurally similar mixed‐valence derivative was reported, with a central Fe 3+ ion linked to three peripheral Fe 2+ centers via phenoxido bridges …”

Section: Chemistry Of Fe4 and Related Complexesmentioning

confidence: 99%

Propeller‐Shaped Fe₄ and Fe₃M Molecular Nanomagnets: A Journey from Crystals to Addressable Single Molecules

et al. 2019

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This Microreview covers the preparation and investigation of Fe 4 and Fe 3 M complexes with a propeller-like structure, most of which function as single-molecule magnets (SMMs). The magnetic characterization of these highly symmetric and chemically versatile complexes has enabled the establishment of important magneto-structural correlations regarding magnetic anisotropy and magnetic relaxation mechanisms in SMM materials. Their chemical stability and easy functionali- [a]

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The solvent effect in an axially symmetric Fe^III₄ single-molecule magnet

Cited by 21 publications

References 19 publications

Magnetic Anisotropy of Tetrahedral Co^II Single-Ion Magnets: Solid-State Effects

Magnetic Anisotropy of Tetrahedral Co^II Single-Ion Magnets: Solid-State Effects

A Family of Co^IICo^III₃ Single-Ion Magnets with Zero-Field Slow Magnetic Relaxation: Fine Tuning of Energy Barrier by Remote Substituent and Counter Cation

Propeller‐Shaped Fe₄ and Fe₃M Molecular Nanomagnets: A Journey from Crystals to Addressable Single Molecules

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The solvent effect in an axially symmetric FeIII4 single-molecule magnet

Cited by 21 publications

References 19 publications

Magnetic Anisotropy of Tetrahedral CoII Single-Ion Magnets: Solid-State Effects

Magnetic Anisotropy of Tetrahedral CoII Single-Ion Magnets: Solid-State Effects

A Family of CoIICoIII3 Single-Ion Magnets with Zero-Field Slow Magnetic Relaxation: Fine Tuning of Energy Barrier by Remote Substituent and Counter Cation

Propeller‐Shaped Fe4 and Fe3M Molecular Nanomagnets: A Journey from Crystals to Addressable Single Molecules

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Product

Resources

About

The solvent effect in an axially symmetric Fe^III₄ single-molecule magnet

Magnetic Anisotropy of Tetrahedral Co^II Single-Ion Magnets: Solid-State Effects

Magnetic Anisotropy of Tetrahedral Co^II Single-Ion Magnets: Solid-State Effects

A Family of Co^IICo^III₃ Single-Ion Magnets with Zero-Field Slow Magnetic Relaxation: Fine Tuning of Energy Barrier by Remote Substituent and Counter Cation

Propeller‐Shaped Fe₄ and Fe₃M Molecular Nanomagnets: A Journey from Crystals to Addressable Single Molecules