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Magnetochemistry
Special Issues
New Advances in Single-Molecule Magnets
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New Advances in Single-Molecule Magnets

A special issue of Magnetochemistry (ISSN 2312-7481). This special issue belongs to the section "Molecular Magnetism".

Deadline for manuscript submissions: closed (25 January 2023) | Viewed by 4173

Special Issue Editor

Dr. Thaddeus Boron III

E-Mail Website
Guest Editor
Department of Chemistry, Advanced Technology and Science Hall, Slippery Rock University, Slippery Rock, PA 17257, USA
Interests: coordination complexes; single-molecule magnets
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The interest in single-molecule magnets and single-chain magnets has increased significantly since their initial characterization approximately 30 years ago. The field has expanded from multi-metal transition metal-based coordination complexes and polymers to include single-ion transition metal molecules, mixed lanthanide-transition metal systems, single-ion lanthanide complexes, and even molecules that contain actinide metals. Challenges remain in the field, particularly in the a priori design of single-molecule and single-chain magnets. Not only must the molecular spin of the molecules must be controlled, but the magnetoanisotropy of the systems must be managed when designing a new molecule or coordination polymer. Recent advances in the area of single-ion magnets have been instrumental in understanding the behavior of magnetoanisotropy.

We invite investigators to contribute original research articles that focus on the development of novel single-molecule and single-chain magnets. We are particularly interested in articles that explore the rational synthetic design of these types of systems and the synthetic control of magnetoanisotropy.

Dr. Thaddeus Boron III
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Magnetochemistry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • single-molecule magnets
  • single-ion magnets
  • single-chain magnets
  • molecular design
  • magnetoanisotropy

Published Papers (2 papers)

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Research

21 pages, 5250 KiB  
Article
Mononuclear Heptacoordinated 3d-Metal Helicates as a New Family of Single Ion Magnets
by Yulia P. Tupolova, Denis V. Korchagin, Anastasya S. Andreeva, Valery V. Tkachev, Gennadii V. Shilov, Vladimir A. Lazarenko, Leonid D. Popov, Konstantin A. Babeshkin, Nikolay N. Efimov, Roman B. Morgunov, Andrei V. Palii, Stanislav P. Kubrin, Igor N. Shcherbakov and Sergey M. Aldoshin
Magnetochemistry 2022, 8(11), 153; https://doi.org/10.3390/magnetochemistry8110153 - 09 Nov 2022
Cited by 3 | Viewed by 2427
Abstract
The series of Co(II), Fe(II), and Ni(II) mononuclear coordination compounds of [CoL(NCS)2]·3DMSO (1), [CoL(H2O)2](ClO4)2·DMSO (2), [CoL(H2O)(EtOH)][CoCl4]·2H2O (2a), [FeL(NCS)2]·DMSO ( [...] Read more.
The series of Co(II), Fe(II), and Ni(II) mononuclear coordination compounds of [CoL(NCS)2]·3DMSO (1), [CoL(H2O)2](ClO4)2·DMSO (2), [CoL(H2O)(EtOH)][CoCl4]·2H2O (2a), [FeL(NCS)2]·DMSO (3), and [NiL(NCS)2]·CH3CN (4) composition (where L is 2,6-bis(1-(2-(4,6-dimethylpyrimidin-2-yl)hydrazineylidene)ethyl)pyridine), with an [MLA2] coordination unit (where A is a pair of apical monodentate ligands), was synthesized. In compounds 1, 2, 2a, and 3, the ligand L is pentadentate, and cobalt and iron ions are placed in a heavily distorted pentagonal pyramidal coordination environment, while in 4 the Ni(II) ion is hexacoordinated. Easy plane-type magnetic anisotropy (D = 13.69, 11.46, 19.5, and 6.2 cm−1 for 1, 2, 2a, and 4, respectively) was established for cobalt and nickel compounds, while easy axis-type magnetic anisotropy (D = −14.5 cm−1) was established for iron compound 3. The cobalt coordination compounds 1 and 2 show SIM behavior under a 1500 Oe external magnetic field, with effective magnetization reversal barriers of 65(1) and 60(1) K for 1 and 2, respectively. The combination of Orbach and Raman relaxation mechanisms was shown to adequately describe the temperature dependence of relaxation times for 1 and 2. CASSCF/NEVPT2 calculations were performed to model the parameters of the effective spin Hamiltonian for the compounds under study. Full article
(This article belongs to the Special Issue New Advances in Single-Molecule Magnets)
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14 pages, 10523 KiB  
Article
Effect of Ligand Substitution on Zero-Field Slow Magnetic Relaxation in Mononuclear Dy(III) β-Diketonate Complexes with Phenanthroline-Based Ligands
by Egor V. Gorshkov, Denis V. Korchagin, Elena A. Yureva, Gennadii V. Shilov, Mikhail V. Zhidkov, Alexei I. Dmitriev, Nikolay N. Efimov, Andrew V. Palii and Sergey M. Aldoshin
Magnetochemistry 2022, 8(11), 151; https://doi.org/10.3390/magnetochemistry8110151 - 07 Nov 2022
Cited by 3 | Viewed by 1520
Abstract
Herein, we report the synthesis, structure and magnetic properties of two mononuclear complexes of general formula [Dy(acac)3(L)], where L = 2,2-dimethyl-1,3-dioxolo[4,5-f][1,10] phenanthroline (1) or 1,10-phenanthroline-5,6-dione (2), and acac− = acetylacetonate anion. A distorted square-antiprismatic [...] Read more.
Herein, we report the synthesis, structure and magnetic properties of two mononuclear complexes of general formula [Dy(acac)3(L)], where L = 2,2-dimethyl-1,3-dioxolo[4,5-f][1,10] phenanthroline (1) or 1,10-phenanthroline-5,6-dione (2), and acac− = acetylacetonate anion. A distorted square-antiprismatic N2O6 environment around the central Dy(III) ion is formed by three acetylacetonate anions and a phenanthroline-type ligand. Both complexes display a single-molecule magnet (SMM) behavior at zero applied magnetic field. Modification of the peripheral part of ligands L provide substantial effects both on the magnetic relaxation barrier Ueff and on the quantum tunneling of magnetization (QTM). Ab initio quantum-chemical calculations are used to analyze the electronic structure and magnetic properties. Full article
(This article belongs to the Special Issue New Advances in Single-Molecule Magnets)
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