Fulvalene as a platform for the synthesis of a dimetallic dysprosocenium single-molecule magnet

He, Mian; Guo, Fu‐Sheng; Tang, Jinkui; Mansikkamäki, Akseli; Layfield, Richard A.

doi:10.1039/d0sc02033h

Cited by 38 publications

(33 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Attempts to adapt this particular strategy to dysprosocenium complexes suffer from a similar problemweak superexchange interactions of the lanthanides with other metal centers through diamagnetic bridging ligands limit their influence on the slow magnetic relaxation. [28][29][30] Therefore, the route towards the high-performance MNMs based on superexchange interactions has been largely abandoned.…”

Section: Introductionmentioning

confidence: 99%

An 'Intermetallic' Molecular Nanomagnet with the Lanthanide Coordinated Only by Transition Metals

Magott

Brzozowska

Baran

et al. 2022

Preprint

View full text Add to dashboard Cite

The best performing molecular nanomagnets are currently designed by carefully arranging p-element donor atoms (usually carbon, nitrogen and/or oxygen) around the central magnetic ion. Inspired by the structure of the hardest intermetallic magnet SmCo5, we have demonstrated a nanomagnetic molecule where the central lanthanide (Ln) ion Er is coordinated solely by three transition metal (TM) ions in a perfectly trigonal planar fashion. The molecule [Er(ReCp2)3] (ErRe3) constitutes the first example of a molecular nanomagnet (MNM; or single molecule magnet SMM) with unsupported Ln-TM bonds and paves the way towards molecular intermetallics with strong direct magnetic exchange interactions. Such interactions are believed to be crucial for quenching the quantum tunneling of magnetization which limits the application of Ln-SMMs as sub-nanometer magnetic memory units.

show abstract

Section: Introductionmentioning

confidence: 99%

An 'Intermetallic' Molecular Nanomagnet with the Lanthanide Coordinated Only by Transition Metals

Magott

Brzozowska

Baran

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…QTM is frequently the reason for a very fast relaxation acceleration under zero magnetic field, so its exclusion is crucial to improve single molecule magnet performance. Even weak exchange interaction (mostly dipolar in nature) between two lanthanide ions can be significant enough to hinder the quantum tunneling of magnetization at H DC = 0 [14][15][16][17][18][19][20]. Moreover, magnetic interactions are necessary to engineer universal qugates (quantum gates) as demonstrated for dinuclear LnLn molecules [21].…”

Section: Introductionmentioning

confidence: 99%

Low-Coordinate Dinuclear Dysprosium(III) Single Molecule Magnets Utilizing LiCl as Bridging Moieties and Tris(amido)amine as Blocking Ligands

et al. 2021

View full text Add to dashboard Cite

A low-coordinate dinuclear dysprosium complex {[Dy(N3N)(THF)][LiCl(THF)]}2 (Dy2) with a double bridging ‘LiCl’ moiety and tris(amido)amine (N3N)3- anions as a blocking ligand is synthesized and characterized structurally and magnetically. Thanks to the use of the chelating blocking ligand (N3N)3− equipped with large steric –SiMe3 groups, the coordination sphere of both DyIII ions is restricted to only six donor atoms. The three amido nitrogen atoms determine the orientation of the easy magnetization axes of both DyIII centers. Consequently, Dy2 shows slow magnetic relaxation typical for single molecule magnets (SMMs). However, the effective energy barrier for magnetization reversal determined from the AC magnetic susceptibility measurements is much lower than the separation between the ground and the first excited Kramers doublet based on the CASSCF ab initio calculations. In order to better understand the possible influence of the anticipated intramolecular magnetic interactions in this dinuclear molecule, its GdIII-analog {[Gd(N3N)(THF)][LiCl(THF)]}2 (Gd2) is also synthesized and studied magnetically. Detailed magnetic measurements reveal very weak antiferromagnetic interactions in Gd2. This in turn suggests similar antiferromagnetic interactions in Dy2, which might be responsible for its peculiar SMM behavior and the absence of the magnetic hysteresis loop.

show abstract

“…All the lanthanides, except Gd(III) which is completely isotropic, and Eu(III) which has a non-magnetic ground state (angular momentum quantum number J = 0), are potential candidates in the assembly of SMMs. Again among them, complexes of Dy(III) have been the most widely studied because Dy(III) has a high J value of 15/2 and g value of 4/3 [12][13][14][15][16][17]. In addition, Dy(III) is a Kramers ion, having an odd J value which results in a time-reversal symmetric degenerate M J states.…”

Section: Introductionmentioning

confidence: 99%

High-Coordinate Mononuclear Ln(III) Complexes: Synthetic Strategies and Magnetic Properties

2020

View full text Add to dashboard Cite

Single-molecule magnets involving monometallic 4f complexes have been investigated extensively in last two decades to understand the factors that govern the slow magnetization relaxation behavior in these complexes and to establish a magneto-structural correlation. The prime goal in this direction is to suppress the temperature independent quantum tunneling of magnetization (QTM) effect via fine-tuning the coordination geometry/microenvironment. Among the various coordination geometries that have been pursued, complexes containing high coordination number around Ln(III) are sparse. Herein, we present a summary of the various synthetic strategies that were used for the assembly of 10- and 12-coordinated Ln(III) complexes. The magnetic properties of such complexes are also described.

show abstract

Fulvalene as a platform for the synthesis of a dimetallic dysprosocenium single-molecule magnet

Abstract: A series of fulvalene-supported dimetallic dysprosium metallocene SMMs provides a roadmap to poly-cationic dysprosocenium single-molecule magnets.

Cited by 38 publications

References 59 publications

An 'Intermetallic' Molecular Nanomagnet with the Lanthanide Coordinated Only by Transition Metals

An 'Intermetallic' Molecular Nanomagnet with the Lanthanide Coordinated Only by Transition Metals

Low-Coordinate Dinuclear Dysprosium(III) Single Molecule Magnets Utilizing LiCl as Bridging Moieties and Tris(amido)amine as Blocking Ligands

High-Coordinate Mononuclear Ln(III) Complexes: Synthetic Strategies and Magnetic Properties

Contact Info

Product

Resources

About