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Magnetochemistry
Special Issues
Paramagnetic Metal Ion-Containing Polyoxometalates
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Paramagnetic Metal Ion-Containing Polyoxometalates

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

Deadline for manuscript submissions: closed (20 November 2021) | Viewed by 9276

Special Issue Editor

Dr. Masooma Ibrahim

E-Mail Website
Guest Editor
Karlsruhe Institute of Technology, Institute of Nanotechnology (INT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
Interests: polyoxometalate (POM); molecular magnetism; catalysis; 3d-POMs; 4f-POMs; 3d-4f-POMs; polyoxometalate-based inorganic frameworks (POMIF); extended frameworks
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Polyoxometalates (POMs) are anionic metal oxide clusters of early transition metals (Mo, W, V, and Nb) in their highest oxidation states. POM-based materials have attracted great attention due to their outstanding physical and chemical properties that make them promising candidates for applications in various areas. The electronic and topological structures of POM systems can be tuned by incorporation of transition metal ions or groups of transition metal ions at specific sites of the various lacunary POM ligands. Thus, the resultant properties directed by the structure–property relationship allows for a bottom-up approach to the development of multifunctional materials. Within the class of transition metal-substituted POMs, the paramagnetic metal ion-containing POMs represents the largest subclass due to their remarkable structural diversities, different chemical compositions, and potential applications in the field of molecular magnetism, magnetocaloric refrigerants, magnetic resonance imaging (MRI), magnetic sensing, molecular spintronics, and quantum computing.

This Special Issue invites research papers covering all research areas related to paramagnetic metal ion-containing POMs (magnetic POMs with 3d-transition metals ions, lanthanide ions, actinide ions, main group elements, heterometallic ions, and organic–inorganic hybrids), their preparation, characterization, and various applications.

You may choose our Joint Special Issue in Applied Sciences.

Dr. Masooma Ibrahim
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 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

  • polyoxometalates (POMs)
  • lacunary POMs
  • magnetic POMs
  • paramagnetic metal
  • molecular magnetism
  • heterometallic POMs
  • magnetocaloric refrigerants
  • magnetic resonance imaging (MRI)

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Published Papers (3 papers)

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Research

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15 pages, 5143 KiB  
Article
Electrochemical, Electrocatalytic, and Magnetic Properties of Vanadium-Containing Polyoxometalates
by Joseph Dika Manga, Anne-Lucie Teillout, Eric Rivière, Pedro de Oliveira and Israël Martyr Mbomekallé
Magnetochemistry 2021, 7(12), 157; https://doi.org/10.3390/magnetochemistry7120157 - 3 Dec 2021
Cited by 2 | Viewed by 3002
Abstract
Mono-substituted vanadium-containing Dawson-type polyoxometalates having the general formula α1-[VIVW17X2O62]8− and α2-[VIVW17X2O62]8−, with X = As or P, were synthesised and [...] Read more.
Mono-substituted vanadium-containing Dawson-type polyoxometalates having the general formula α1-[VIVW17X2O62]8− and α2-[VIVW17X2O62]8−, with X = As or P, were synthesised and subject to a comprehensive electrochemical study comprising the pH dependency. These POMs exhibit an electrocatalytic behaviour towards the oxidation of thiols (namely cysteine), rendering them interesting species for mimicking oxidative stress situations, at physiological pH values. The efficiency of the electro-oxidation was assessed with thiols of different nature, and the substrate that responded best was used to compare the electrocatalytic capabilities of the POM series. The magnetic behaviour of these POMs was also evaluated and compared to their analogues, α1- and α2-[VVW17X2O62]7− (X = As or P), at low temperatures and showed, as expected, a paramagnetic behaviour of VIV based compounds. Full article
(This article belongs to the Special Issue Paramagnetic Metal Ion-Containing Polyoxometalates)
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9 pages, 3291 KiB  
Article
A New FeIII Substituted Arsenotungstate [FeIII2(AsIIIW6O23)2(AsIIIO3H)2]12−: Synthesis, Structure, Characterization and Magnetic Properties
by Masooma Ibrahim, Yan Peng and Christopher E. Anson
Magnetochemistry 2020, 6(4), 54; https://doi.org/10.3390/magnetochemistry6040054 - 25 Oct 2020
Cited by 2 | Viewed by 3006
Abstract
The iron(III)-containing arsenotungstate [FeIII2(AsIIIW6O23)2(AsIIIO3H)2]12− (1) was prepared via a simple, one-pot reaction in aqueous basic medium. The compound was isolated as its sodium [...] Read more.
The iron(III)-containing arsenotungstate [FeIII2(AsIIIW6O23)2(AsIIIO3H)2]12− (1) was prepared via a simple, one-pot reaction in aqueous basic medium. The compound was isolated as its sodium salt, and structurally-characterized by Single Crystal X-ray Diffraction (SCXRD), Powder X-ray Diffraction (PXRD), Fourier-Transform Infrared (FT-IR) spectroscopy, Thermogravimetric Analysis (TGA) and elemental analysis. Its magnetic properties are reported; the antiferromagnetic coupling between the two FeIII centers is unusually weak as a result of the bridging geometry imposed by the rigid arsenotungstate metalloligands. Full article
(This article belongs to the Special Issue Paramagnetic Metal Ion-Containing Polyoxometalates)
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Review

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23 pages, 6959 KiB  
Review
Hervé- and Krebs-Type Magnetic Polyoxometalate Dimers
by Aleksandar Kondinski, Abhishek Banerjee and Sib Sankar Mal
Magnetochemistry 2022, 8(9), 96; https://doi.org/10.3390/magnetochemistry8090096 - 27 Aug 2022
Cited by 1 | Viewed by 2388
Abstract
Lacunary polyoxometalates (POMs) are negatively charged metal–oxo clusters, formally obtained from plenary topologies via fragment removal. Owing to the fragment removal, the lacunary POMs archetypes are rich in nucleophilic terminal oxo ligands, making them suitable for post-synthetic coordination with various heterometals. Trilacunary heteropolytungstates [...] Read more.
Lacunary polyoxometalates (POMs) are negatively charged metal–oxo clusters, formally obtained from plenary topologies via fragment removal. Owing to the fragment removal, the lacunary POMs archetypes are rich in nucleophilic terminal oxo ligands, making them suitable for post-synthetic coordination with various heterometals. Trilacunary heteropolytungstates (hetero-POTs) based on bowl-shaped {W9O30} framework incorporating a central lone-pair containing {XO3} hetergroup (X = AsIII, SbIII, and BiIII) function as all-inorganic scaffolds that in the presence of d-block metal cations typically construct sandwich-like dimers of Hervé and/or Krebs. Herein we review the preparative approaches, as well as compositional and magnetic versatility of the constructed Hervé- and Krebs-type dimers and discuss prospective uses as POMtronics. Full article
(This article belongs to the Special Issue Paramagnetic Metal Ion-Containing Polyoxometalates)
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