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Molecules
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Design of Coordination Compounds with Novel Magnetic Properties
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Design of Coordination Compounds with Novel Magnetic Properties

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (15 May 2023) | Viewed by 4959

Special Issue Editors

Prof. Dr. Salah Massoud

E-Mail Website
Guest Editor
Department of Chemistry, University of Louisiana at Lafayette, B. O. Box 44370, Lafayette, LA 70504-4370, USA
Interests: coordination chemistry relevant to biological systems, namely DNA cleavage and phosphodiester hydrolysis by mononuclear and polynuclear coordination compounds and anticancer agents based on novel Cu(II) complexes; molecular magnetism, magnetic properties, single-molecule magnets (SMMs) and field-induced single-ion magnets (SIMs); synthesis and characterization of novel mononuclear, polynuclear and coordination polymers (CPs); luminescence emission properties of (n-1)d10 coordination compounds Zn(II) and Cd(II) and lanthanides; carbon dioxide fixation by coordination compounds
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Febee Louka

E-Mail Website
Guest Editor
Department of Chemistry, University of Louisiana at Lafayette, B. O. Box 44370, Lafayette, LA 70504-4370, USA
Interests: synthesis and characterization of novel mononuclear, binuclear and polynuclear coordination compounds based metal(II) complexes and their applications in biological systems; studying the effect of changing the metal and the steric effect on the mechanism of DNA cleavage by metal(II) complexes; investigating the role of the ligand on the efficiency of copper(II) complexes based on different ligands as anticancer agents and studying the cytotoxicity; synthesis and characterization of novel mononuclear, polynuclear and coordination polymers (CPs) and investigate the luminescence emission properties; synthesis of poly-metal complexes for coating micro- and nano- biosensors used in the medicinal field

Special Issue Information

Dear Colleagues,

The coordination compounds play crucial roles in the field of coordination chemistry since its discovery by Alfred Werner (Nobel Prize in Chemistry 1913). The interaction of metal ions and organic ligands led to the creation of interesting molecules of fascinating structures and topologies. This class of compounds excited the research community in developing and finding many applications for these compounds in medicinal chemistry, molecular biology and biological models, material sciences, physics, luminescence, nanotechnology, metal-organic framework (MOFs), multifunctional biomolecular ligand and transition metal ions (BioMOFs) and molecular magnetism. All these potential applications make the coordination chemistry and specifically designing novel coordination compounds with new ligands is one of the most productive area in chemistry. One of the very interesting area that coordination compounds can enhance our understanding with is the field of molecular magnetism, which is rapidly evolved. In addition, to the traditional aspects of this field in studying the magnetic properties to get some insights about the electronic interaction in multinuclear systems and Spin-Cross Over phenomenon (SCO), other sophisticated properties such as molecular nanomagnets and Single-Molecule Magnets (SMMs) have been emerged in the last two decades. The SMMs maintain magnetization in the zero external field and some of these molecules retain the magnetization above the boiling point of liquid nitrogen. These molecules play the key role in increasing the memory storage and in the design of quantum computers. The 4f-electrons of lanthanide ions and the ligand field have contributed drastically in improving the performance of lanthanides-based SMMs. The scope of this theme is focused on the synthesis and design of coordination compounds of novel magnetic properties.

Prof. Dr. Salah Massoud
Prof. Dr. Febee Louka
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. Molecules is an international peer-reviewed open access semimonthly 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

  • Coordination compounds
  • Magnetic properties
  • Single-molecule magnets (SMMs)
  • Lanthanides
  • Spin-cross over (SCO)
  • Metamagnetic transition

Published Papers (3 papers)

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Research

12 pages, 4785 KiB  
Article
Single-Molecule Magnet Properties in 3d4f Heterobimetallic Iron and Dysprosium Complexes Involving Hydrazone Ligand
by Bertrand Lefeuvre, Thierry Guizouarn, Vincent Dorcet, Marie Cordier and Fabrice Pointillart
Molecules 2023, 28(17), 6359; https://doi.org/10.3390/molecules28176359 - 30 Aug 2023
Viewed by 758
Abstract
The reaction between the ((E)-N′-(2-hydroxy-3-methoxybenzylidene)pyrazine-2-carbohydrazide) (H2opch) ligand and the metallo-precursor [Dy(hfac)3]·2H2O led to the formation of an homometallic coordination complex with the formula [Dy2(hfac)3(H2O)(Hopch)2][Dy(hfac)4 [...] Read more.
The reaction between the ((E)-N′-(2-hydroxy-3-methoxybenzylidene)pyrazine-2-carbohydrazide) (H2opch) ligand and the metallo-precursor [Dy(hfac)3]·2H2O led to the formation of an homometallic coordination complex with the formula [Dy2(hfac)3(H2O)(Hopch)2][Dy(hfac)4] (1). In presence of both [Dy(hfac)3] 2H2O and the Fe(II) salt, the heterobimetallic tetranuclear [FeDy3(hfac)8(H2O)2(opch)2] (2) was isolated, while the addition of the co-ligand 1,2-Bis(2-hydroxy-3-methoxybenzylidene) hydrazine (H2bmh) led to the formation of two heterobimetallic tetranuclear complexes with the formula [Fe3Dy(hfac)6(opch)2(H2bmh)] C6H14 (3) C6H14 and [Fe2Dy2(hfac)7(opch)2(H2bmh)] 0.5C7H16 (4) 0.5C7H16. Single crystal X-ray diffraction and dc magnetic investigation demonstrated that 3 and 4 involved the iron center in the +II and +III oxidation states. Dynamic magnetic measurements highlighted the single-molecule magnet behavior of 1 and 2 in a zero applied dc field primarily due to the ferromagnetic interactions taking place in these compounds. Full article
(This article belongs to the Special Issue Design of Coordination Compounds with Novel Magnetic Properties)
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20 pages, 3349 KiB  
Article
Magnetostructural Properties of Some Doubly-Bridged Phenoxido Copper(II) Complexes
by Salah S. Massoud, Febee R. Louka, Madison T. Dial, Nahed N. M. H. Salem, Roland C. Fischer, Ana Torvisco, Franz A. Mautner, Kai Nakashima, Makoto Handa and Masahiro Mikuriya
Molecules 2023, 28(6), 2648; https://doi.org/10.3390/molecules28062648 - 14 Mar 2023
Cited by 3 | Viewed by 1554
Abstract
Three new tripod tetradentate phenolate-amines (H2L1, H2L4 and H2L9), together with seven more already related published ligands, were synthesized, and characterized. With these ligands, two new dinuclear doubly-bridged-phenoxido copper(II) complexes ( [...] Read more.
Three new tripod tetradentate phenolate-amines (H2L1, H2L4 and H2L9), together with seven more already related published ligands, were synthesized, and characterized. With these ligands, two new dinuclear doubly-bridged-phenoxido copper(II) complexes (3, 4), and six more complexes (1, 2, 5–8), a new trinuclear complex (9) with an alternative doubly-bridged-phenoxido and –methoxido, as well as the 1D polymer (10) were synthesized, and their molecular structures were characterized by spectroscopic methods and X-ray single crystal crystallography. The Cu(II) centers in these complexes exhibit distorted square-pyramidal arrangement in 1–4, mixed square pyramidal and square planar in 5, 6, and 9, and distorted octahedral (5+1) arrangements in 7 and 8. The temperature dependence magnetic susceptibility study over the temperature range 2–300 K revealed moderate–relatively strong antiferromagnetic coupling (AF) (|J| = 289–145 cm−1) in complexes 1–6, weak-moderate AF (|J| = 59 cm−1) in the trinuclear complex 9, but weak AF interactions (|J| = 3.6 & 4.6 cm−1) were obtained in 7 and 8. No correlation was found between the exchange coupling J and the geometrical structural parameters of the four-membered Cu2O2 rings. Full article
(This article belongs to the Special Issue Design of Coordination Compounds with Novel Magnetic Properties)
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13 pages, 1442 KiB  
Article
Crystal Structure and Magnetic Properties of Trinuclear Transition Metal Complexes (MnII, CoII, NiII and CuII) with Bridging Sulfonate-Functionalized 1,2,4-Triazole Derivatives
by Andrea Moneo-Corcuera, Breogán Pato-Doldan, Irene Sánchez-Molina, David Nieto-Castro and José Ramón Galán-Mascarós
Molecules 2021, 26(19), 6020; https://doi.org/10.3390/molecules26196020 - 4 Oct 2021
Cited by 4 | Viewed by 1867
Abstract
Here we present the synthesis, structure and magnetic properties of complexes of general formula (Mn)(Me2NH2)4][Mn3(μ-L)6(H2O)6] and (Me2NH2)6[M3(μ-L)6(H2O) [...] Read more.
Here we present the synthesis, structure and magnetic properties of complexes of general formula (Mn)(Me2NH2)4][Mn3(μ-L)6(H2O)6] and (Me2NH2)6[M3(μ-L)6(H2O)6] (M = CoII, NiII and CuII); L−2 = 4-(1,2,4-triazol-4-yl) ethanedisulfonate). The trinuclear polyanions were isolated as dimethylammonium salts, and their crystal structures determined by single crystal and powder X-ray diffraction data. The polyanionic part of these salts have the same molecular structure, which consists of a linear array of metal(II) ions linked by triple N1-N2-triazole bridges. In turn, the composition and crystal packing of the MnII salt differs from the rest of the complexes (with six dimethyl ammonia as countercations) in containing one Mn+2 and four dimethyl ammonia as countercations. Magnetic data indicate dominant intramolecular antiferromagnetic interactions stabilizing a paramagnetic ground state. Susceptibility data have been successfully modeled with a simple isotropic Hamiltonian for a centrosymmetric linear trimer, H = −2J (S1S2 + S2S3) with super-exchange parameters J = −0.4 K for MnII, −7.5 K for NiII and −45 K for CuII complex. The magnetic properties of these complexes and their easy processing opens unique possibilities for their incorporation as magnetic molecular probes into such hybrid materials as magnetic/conducting multifunctional materials or as dopant for organic conducting polymers. Full article
(This article belongs to the Special Issue Design of Coordination Compounds with Novel Magnetic Properties)
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