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Magnetochemistry
Special Issues
Reviews on Slow-Relaxation Molecules
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Reviews on Slow-Relaxation Molecules

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

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 9213

Special Issue Editors

Prof. Dr. Marius Andruh

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Guest Editor
1. Laboratory of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, Bd. Regina Elisabeta nr. 4-12, Bucharest, Romania
2. "C. D. Nenitzescu" Institute of Organic and Supramolecular Chemistry of the Romanian Academy, Splaiul Independentei 202 B, Bucharest, Romania
Interests: molecular magnetism; crystal engineering; metallosupramolecular chemistry; homo- and hetero-polynuclear complexes
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Eva Rentschler

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Guest Editor
Department of Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
Interests: coordination chemistry; magnetism; spin crossover; fluorescence; multifunctional materials; molecular electronics; molecular systems on surfaces
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Andrea Caneschi

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Guest Editor
Department of Industrial Engineering - DIEF, University of Florence, Via di S. Marta 3, 50139 Firenze, Italy
Interests: molecular magnetism; magnetic nanoparticles; nanostructured magnetic materials; molecules on surfaces; organic radicals
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Since the discovery of the first Single Molecule Magnet (1993) and the first Single Chain Magnet (2001), the investigation of slow relaxation of the magnetization phenomena became a field of intensive interdisciplinary research. Beyond their relevance in Physics and Chemistry, one expects spectacular applications in quantum computing and high-density information storage from these molecules. In the last twenty years or so, the search for compounds with high energy barriers to magnetization reversal (high blocking temperatures) has stimulated the development of very rich coordination chemistry. A huge number of mono- and oligo-nuclear complexes, 1D coordination polymers, homo- and hetero-spin systems have been synthesized and the investigation of their dynamic magnetic properties revealed the determinants influencing the relaxation phenomena. The subtle factors influencing the magnetic anisotropy are more and better understood. This understanding further serves as a guide for the design of new, and higher performant SMMs and SCMs. An important step towards applications was achieved by organizing SMMs on surfaces.

We, therefore, think that a collection of review articles presenting the state-of-the-art in this exciting field will be useful for researchers as well as for students. There are many attractive aspects to be presented, from chemical, physical, or theoretical perspectives. 

Prof. Dr. Marius Andruh
Prof. Dr. Eva Rentschler
Prof. Dr. Andrea Caneschi
Guest Editors

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 2200 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 chain magnets
  • magnetic anisotropy
  • synthetic approaches towards slow relaxation molecules

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Published Papers (3 papers)

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Research

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12 pages, 2990 KiB  
Article
Magnetic Field Effect on the Oxidation of Unsaturated Compounds by Molecular Oxygen
by Evgenii M. Pliss and Mikhail E. Soloviev
Magnetochemistry 2022, 8(4), 44; https://doi.org/10.3390/magnetochemistry8040044 - 11 Apr 2022
Cited by 1 | Viewed by 2468
Abstract
A quantum-chemical analysis of the effect of a constant magnetic field on radical formation in the processes of chain oxidation of organic compounds by molecular oxygen is presented. The calculation of the total electronic energies and thermodynamic functions of the compounds involved in [...] Read more.
A quantum-chemical analysis of the effect of a constant magnetic field on radical formation in the processes of chain oxidation of organic compounds by molecular oxygen is presented. The calculation of the total electronic energies and thermodynamic functions of the compounds involved in the reactions was performed by the density functional method with the hybrid exchange-correlation functional of Becke, Lee, Yang and Parr DFT B3LYP/6-311G** using the NWChem software package. The effect of the magnetic field on the individual stages of chain oxidation is associated with the evolution of radical pairs. It is assumed that the dipole–dipole interaction in a radical pair is not averaged by the diffusion of radicals and should be taken into account. To a large extent, the magnetic field effect (MFE) value is influenced by the ratio between the relaxation time of the oscillatory-excited state in the radical pair (tvib) and the relaxation time of the inter-combination transitions (tst). Although the developed technique refers to liquid-phase reactions, it can be used to study the MFE for oxidation of biologically significant compounds in multiphase systems, such as micelles, liposomes and membranes. Full article
(This article belongs to the Special Issue Reviews on Slow-Relaxation Molecules)
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14 pages, 2024 KiB  
Article
Field-Induced SMM and Vis/NIR Luminescence on Mononuclear Lanthanide Complexes with 9-Anthracenecarboxylate and 2,2′:6,2″-Terpyridine
by Berta Casanovas, Oriol Porcar, Saskia Speed, Ramon Vicente, Mercè Font-Bardía and Mohamed Salah El Fallah
Magnetochemistry 2021, 7(9), 124; https://doi.org/10.3390/magnetochemistry7090124 - 10 Sep 2021
Cited by 8 | Viewed by 2655
Abstract
Five new mononuclear lanthanide complexes are synthesized by adding the several lanthanide nitrate hexahydrate salts, which for lanthanide (Ln) are Eu, Tb, Dy, Er, and Yb, with 9-anthracenecarboxylic acid (9-Hanthc) and 2,2′:6,2″-terpyridine (TPY) in mixed solution of methanol and dimethylformamide (DMF). The general [...] Read more.
Five new mononuclear lanthanide complexes are synthesized by adding the several lanthanide nitrate hexahydrate salts, which for lanthanide (Ln) are Eu, Tb, Dy, Er, and Yb, with 9-anthracenecarboxylic acid (9-Hanthc) and 2,2′:6,2″-terpyridine (TPY) in mixed solution of methanol and dimethylformamide (DMF). The general formula is [Eu(9-anthc)3(TPY)(DMF)]·H2O (1Eu) where Eu(III) is ennea-coordinated or [Ln(9-anthc)3(TPY)(H2O)]·H2O·DMF (Ln = Tb (2Tb), Dy (3Dy), Er (4Er), and Yb (5Yb)) where Ln(III) is octa-coordinated. For compounds 3Dy, 4Er, and 5Yb, the dynamic ac magnetic study indicated field-induced single molecule magnet (SMM) behavior. The photoluminescence studies in the solid state of these complexes show the sensitization of 4f-4f transitions for 4Er and 5Yb in the NIR region. Full article
(This article belongs to the Special Issue Reviews on Slow-Relaxation Molecules)
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Review

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13 pages, 4218 KiB  
Review
The Underexplored Field of Lanthanide Complexes with Helicene Ligands: Towards Chiral Lanthanide Single Molecule Magnets
by Gabriela Handzlik, Katarzyna Rzepka and Dawid Pinkowicz
Magnetochemistry 2021, 7(10), 138; https://doi.org/10.3390/magnetochemistry7100138 - 9 Oct 2021
Cited by 5 | Viewed by 3108
Abstract
The effective combination of chirality and magnetism in a single crystalline material can lead to fascinating cross-effects, such as magneto-chiral dichroism. Among a large variety of chiral ligands utilized in the design and synthesis of chiral magnetic materials, helicenes seem to be the [...] Read more.
The effective combination of chirality and magnetism in a single crystalline material can lead to fascinating cross-effects, such as magneto-chiral dichroism. Among a large variety of chiral ligands utilized in the design and synthesis of chiral magnetic materials, helicenes seem to be the most appealing ones, due to the exceptionally high specific rotation values that reach thousands of deg·cm3·g−1·dm−1, which is two orders of magnitude higher than for compounds with chiral carbon atoms. Despite the sizeable family of transition metal complexes with helicene-type ligands, there are only a few examples of such complexes with lanthanide ions. In this mini-review, we describe the most recent developments in the field of lanthanide-based complexes with helicene-type ligands and summarize insights regarding the further exploration of this family of compounds towards multifunctional chiral lanthanide single molecule magnets (Ln-SMMs). Full article
(This article belongs to the Special Issue Reviews on Slow-Relaxation Molecules)
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