Magnetic Slow Relaxation in Cyclic Tb<sup>III</sup>‐Nitronyl Nitroxide Radical Complexes

Tian, Haixia; Liu, Ruina; Wang, Xiaoling; Yang, Pei‐Pei; Li, Zuo‐Xi; Li, Licun; Liao, Dai‐Zheng

doi:10.1002/ejic.200900584

Cited by 73 publications

(11 citation statements)

References 44 publications

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“…The Tb-O nitroxide bond length in 3 is slightly shorter than that for other terbium(III) compounds coordinated by a nitroxide oxygen atom previously reported in the literature. 10,11,22 The Ln1-O1-N1 bond angle is slightly larger in 5 [137.9(7)°] when compared with that observed in 3 [135.8(3)°]. The torsion angles between the imidazole and phenyl rings are larger than the corresponding angles in 1 and 2, revealing that monocoordination of the IPhIN biradical allows it to have more structural flexibility compared with dinuclear coordination.…”

Section: Ab Initio Calculations For Compoundmentioning

confidence: 98%

First coordination compounds based on a bis(imino nitroxide) biradical and 4f metal ions: synthesis, crystal structures and magnetic properties

et al. 2016

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aThe synthesis, crystal structures and magnetic properties of two families of heterospin complexes containing lanthanide ions and a bis(imino nitroxide) biradical 4',5', (5)) is coordinated to the biradical. Ferromagnetic intramolecular magnetic interactions between Gd III and the biradical were found for 1 and 4, while intramolecular magnetic interactions between the radicals were ferro-and antiferromagnetic, respectively. Compound 2 shows a field induced slow relaxation of magnetization, which (under an external applied field of 2 kOe) exhibits an activation energy barrier of ΔE/k B = 27 K and a pre-exponential factor of 1.4 × 10 −8 s. To support the magnetic characterization of compound 3 ab initio calculations were also performed.

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Section: Ab Initio Calculations For Compoundmentioning

confidence: 98%

First coordination compounds based on a bis(imino nitroxide) biradical and 4f metal ions: synthesis, crystal structures and magnetic properties

et al. 2016

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“…From a synthetic approach, this makes it rather challenging to apply the aforementioned design strategies to optimize the SMM properties, especially in complexes with nuclearities greater than two, where control over the symmetry and magnetic axiality can be challenging. Many recent developments are now focused on introducing radical ligands into metal complexes (Figure 3), which can give rise to stronger magnetic interactions, even with lanthanides [72–82] . This is due to the fact that radicals can better attain the deeply buried 4f orbitals, thereby allowing for direct exchange coupling between the lanthanide and radical ligand.…”

Section: Advancements In the Field Of Single‐molecule Magnetsmentioning

confidence: 99%

Shining New Light on Multifunctional Lanthanide Single‐Molecule Magnets

2020

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Single‐molecule magnets (SMMs) are at the forefront of new technological advances in quantum information processing and spintronics. Despite the recent impressive breakthroughs in extending the magnetic blocking temperatures beyond liquid‐nitrogen temperatures, significant challenges await in terms of integrating and addressing such compounds in devices. With this ultimate goal in mind, the design of multifunctional SMMs not only allows to imbue molecules of interest with specific properties that would allow for in situ monitoring of the SMM operation in real time, but can also provide critical insights into our understanding of the magnetic behaviour. In this Review, we highlight how magnetism and luminescence can be harmoniously combined within single molecules to achieve these objectives. The key design principles to attain the simultaneous combination of photoluminescence and slow relaxation of the magnetization are discussed, along with an outlook on how such molecules could be beneficial for emerging next‐generation spintronics devices.

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“…28) [303], while the coupling constants for the Gd III species was determined to be J 1,Gd-L = +2.60 cm −1 and J 2,Gd-L = −0.24 cm −1 [256]. A related complex, [Tb(hfac) 3 (NIT3Py)] 2 , in which meta pyridyl-substituted nitronyl nitroxide ligands link two Tb III centers, also displayed slow magnetic relaxation under a 3 kOe dc field, featuring a barrier of 13.2 cm −1 [305].…”

Section: Nitronyl Nitroxide Radical-bridged Lanthanide Complexesmentioning

confidence: 99%