Does Symmetry Influence the Properties of [MnIII6CrIII]3+ Single‐Molecule Magnets?

Hoeke, Veronika; Stammler, Anja; Bögge, Hartmut; Glaser, Thorsten

doi:10.1002/zaac.201800309

Cited by 5 publications

(2 citation statements)

References 78 publications

(82 reference statements)

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“…Testing the myriad combinations is necessary to identify the most optimal and advantageous ones, which is a process that is undoubtedly neither easy nor quick. In recent years, a considerable amount of research is dedicated to (among others) the Mn 6 sub-family [ 42 , 226 , 227 ]. This trend is expected to persist, given the adaptability of these species for ligand exchange and property tuning.…”

Section: Discussionmentioning

confidence: 99%

Nanostructures as the Substrate for Single-Molecule Magnet Deposition

Adamek,

Pastukh,

Laskowska

et al. 2023

IJMS

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Anchoringsingle-molecule magnets (SMMs) on the surface of nanostructures is gaining particular interest in the field of molecular magnetism. The accurate organization of SMMs on low-dimensional substrates enables controlled interactions and the possibility of individual molecules’ manipulation, paving the route for a broad range of nanotechnological applications. In this comprehensive review article, the most studied types of SMMs are presented, and the quantum-mechanical origin of their magnetic behavior is described. The nanostructured matrices were grouped and characterized to outline to the reader their relevance for subsequent compounding with SMMs. Particular attention was paid to the fact that this process must be carried out in such a way as to preserve the initial functionality and properties of the molecules. Therefore, the work also includes a discussion of issues concerning both the methods of synthesis of the systems in question as well as advanced measurement techniques of the resulting complexes. A great deal of attention was also focused on the issue of surface–molecule interaction, which can affect the magnetic properties of SMMs, causing molecular crystal field distortion or magnetic anisotropy modification, which affects quantum tunneling or magnetic hysteresis, respectively. In our opinion, the analysis of the literature carried out in this way will greatly help the reader to design SMM-nanostructure systems.

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Section: Discussionmentioning

confidence: 99%

Nanostructures as the Substrate for Single-Molecule Magnet Deposition

Adamek,

Pastukh,

Laskowska

et al. 2023

IJMS

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“…Serendipitously, this [Mn III 6Cr III ] (ClO 4 ) 3 complex crystallized with an approximate D 3 symmetry. This D 3 ‐ [Mn III 6Cr III ] (ClO 4 ) 3 complex shows almost identical behavior compared to the S 6 symmetric [Mn III 6Cr III ] 3+ complexes . Thus, the ferromagnetic coupling in the trinuclear subunits [(chand RR )Mn III 3 ] 3+ cannot be ascribed to its different molecular symmetry, but has to originate from the specific properties of the chiral triplesalen ligand (chand RR ) 6– .…”

Section: Structural Properties Of Higher Generation [Mniii6criii]3mentioning

confidence: 99%

Optimization of Single‐Molecule Magnets by Suppression of Quantum Tunneling of the Magnetization

2020

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The ligand system triplesalen was rationally designed following requirements for polynuclear 3d single‐molecule magnets (SMMs). The essential central part is the C3 symmetric, meta‐phenylene bridging unit phloroglucinol for ferromagnetic interactions via the spin‐polarization mechanism. The triplesalen‐based [MnIII6CrIII]3+ SMMs strongly suppress the quantum tunneling of the magnetization (QTM) but exhibit blocking temperatures not exceeding 2 K. We have analyzed the reason for this behavior and found that the triplesalen ligands are not in the anticipated aromatic phloroglucinol form but in a non‐aromatic heteroradialene form. Here we present our strategies to optimize the triplesalen ligand system to suppress the heteroradialene formation and to enforce ferromagnetic interactions. This allowed us to study in detail the influence of exchange coupling on the QTM and relaxation properties of SMMs and provides valuable insights for further rational improvements of our triplesalen ligand system and of SMMs in general.

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Cube‐like 12‐MC‐4 and Offset Stacked 10‐MC‐3 Metallacrowns: Synthesis, Structure, and Magnetic Properties

Yang

Tian

et al. 2019

Zeitschrift anorg allge chemie

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Two complexes [MnIII4(naphthsao)4(naphthsaoH)4] (1) and [FeIII6O2(naphthsao)4(O2CPh)6] (2) [naphthsao = 1‐(1‐hydroxy‐naphthalen‐2‐yl)ethanone oxime] were obtained through the reactions of naphthsao ligand and MnCl2·4H2O or FeCl3·6H2O in the presence of triethylamine (Et3N). Their structures were determined by X‐ray single crystal diffraction, elemental analysis, and IR spectra. Complex 1 displays 12‐MC‐4 metallacrown structural type with cube‐like configuration and 2 shows an offset stacked 10‐MC‐3 structural type with the ring connectivity containing Fe–O–C–O–Fe–O–N–Fe–O–N. Magnetic susceptibility measurement reveals the ferromagnetic interactions and field‐induced slow relaxation of the magnetization for 1, whereas out‐of‐phase signal is not observed for 2.

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Does Symmetry Influence the Properties of [Mn^III₆Cr^III]³⁺ Single‐Molecule Magnets?

Cited by 5 publications

References 78 publications

Nanostructures as the Substrate for Single-Molecule Magnet Deposition

Nanostructures as the Substrate for Single-Molecule Magnet Deposition

Optimization of Single‐Molecule Magnets by Suppression of Quantum Tunneling of the Magnetization

Cube‐like 12‐MC‐4 and Offset Stacked 10‐MC‐3 Metallacrowns: Synthesis, Structure, and Magnetic Properties

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