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Coordination Cluster Compounds
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Coordination Cluster Compounds

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (10 February 2024) | Viewed by 3040

Special Issue Editors

Dr. Beñat Artetxe

E-Mail Website
Guest Editor
Department of Inorganic Chemistry, Universidad del Pais Vasco UPV/EHU, P.O. Box 644, 48080 Bilbao, Spain
Interests: polyoxometalates; coordination chemistry; X-ray diffraction; crystal structures; photoluminescence; solution studies
Special Issues, Collections and Topics in MDPI journals
Dr. Santiago Reinoso

E-Mail Website
Guest Editor
Departamento de Ciencias & Institute for Advanced Materials and Mathemathics (InaMat2), Universidad Pública de Navarra (UPNA), Pamplona, Spain
Interests: polyoxometalates; coordination chemistry of transition metals and rare earths; synthetic inorganic chemistry; single-crystal X-ray diffraction
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Coordination clusters represent one of the most intriguing areas of inorganic chemistry because it encompasses polynuclear species of very diverse nature such as polyoxometalates, metal-organic polyhedra, and metal-chalcogenide/halide clusters. Their rich solution equilibria, together with a remarkable structural variety that allows systematic compositional variations, have resulted in molecular entities with a wide range of properties (e.g., acidity, outstanding redox behavior, magnetism, optics, catalytic and/or biological activity) arising from the combination of both inorganic metal cations and non-metallic ligands. In some specific cases, the possibility of generating vacant metallic sites in a controlled way allows their use as ligands towards additional electrophilic moieties or organic functions (e.g., transition-metal cations, rare earths, p-block organoderivatives, etc.), thus paving the way for providing the clusters with tailored additional properties

This Special Issue aims to emphasize the latest advances in the chemistry of such type of inorganic clusters by covering topics from fundamental aspects (synthesis, reactivity, spectroscopy, structure, solution studies) to functional materials that incorporate these molecular units (organic polymers, functional surfaces, inorganic matrixes, nanoparticles), as well as their potential applications in fields like catalysis, photo- and electrochemistry, electronics, optics, bio-medicine, energy storage, sorption and environmental remediation.

Dr. Beñat Artetxe
Dr. Santiago Reinoso
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. Materials 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 2600 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
  • metal-halide/chalcogenide clusters
  • coordination chemistry
  • post-functionalization
  • solution studies
  • crystallochemistry
  • functional materials
  • catalysis and magnetism
  • optics and electronics
  • biological applications

Published Papers (2 papers)

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Research

15 pages, 2536 KiB  
Article
Systematic Approach to the Synthesis of Cobalt-Containing Polyoxometalates for Their Application as Energy Storage Materials
by Ángela Barros, Beñat Artetxe, Unai Eletxigerra, Estibaliz Aranzabe and Juan M. Gutiérrez-Zorrilla
Materials 2023, 16(14), 5054; https://doi.org/10.3390/ma16145054 - 17 Jul 2023
Cited by 2 | Viewed by 1329
Abstract
New energy storage materials are an object of study within the framework of the global energy transition. The development of renewable sources is being boosted thanks to stationary energy storage systems such as redox flow batteries (RFBs). This work reports the synthesis of [...] Read more.
New energy storage materials are an object of study within the framework of the global energy transition. The development of renewable sources is being boosted thanks to stationary energy storage systems such as redox flow batteries (RFBs). This work reports the synthesis of the cobalt-containing Keggin-type polyoxometalates [CoW12O40]6− (CoW12) and [Co(H2O)SiW11O39]6− (CoSiW11), which have previously been shown to have applicability in RFBs. These procedures were reassessed to meet the strict requirements associated with the further implementation of RFBs, including fast and affordable synthetic procedures with high reaction yields. In contrast to the lengthy and complicated synthetic approaches published to date, the optimized synthesis reported in this work enables the isolation of the pure crystalline salt of the CoW12 anion with a 75% reduction of the time of the whole reaction procedure, eliminating tedious steps such as the recrystallization and including a 20% increased yield. The control of the stoichiometry, fine-tuning of reaction conditions, and the identification of intermediate species, as well as the acidic equilibria taking place during the process, were monitored via thermal, spectroscopic, and structural analyses. In the case of the CoSiW11 anion, its preparation was based on a simple and highly efficient procedure. Moreover, promising electrochemical properties were observed with the use of the one-pot synthetic approach, in which the stoichiometric amounts of the starting reagents are dissolved in the supporting electrolyte to be directly implemented as the electrolyte for a RFB. Full article
(This article belongs to the Special Issue Coordination Cluster Compounds)
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14 pages, 3458 KiB  
Article
Preferential Enrichment of Enantiomer from Amino Acid Schiff Bases by Coordination Interaction and Crystallization
by Li Yan, Zhongkui Li, Xue Zhong, Jianxin Du, Yan Xiong, Shaochun Peng and Hui Li
Materials 2023, 16(2), 530; https://doi.org/10.3390/ma16020530 - 05 Jan 2023
Cited by 1 | Viewed by 1304
Abstract
In this paper, preferential enrichment (PE) is described for three pairs of novel amino acid Schiff base Cu(II)/Cu(I) complexes. Single crystal X-ray diffraction indicated that 1-S/R are one-dimensional coordination polymers (CPs) with helical structures, and 2-S/R and [...] Read more.
In this paper, preferential enrichment (PE) is described for three pairs of novel amino acid Schiff base Cu(II)/Cu(I) complexes. Single crystal X-ray diffraction indicated that 1-S/R are one-dimensional coordination polymers (CPs) with helical structures, and 2-S/R and 3-S/R are one-dimensional CPs with auxiliary ligands. By tuning the pH, the solvent and second ligands, the 1-S/R, 3-S/R underwent polymorphic transitions, resulting in enantioselective liberation of excess enantiomers into solution, until the deposited crystals were slightly enriched with the opposite enantiomer, thereby successfully exhibiting PE. However, under the effects of Cu(II), the solvent and low pH, 2-S/R did not exhibit PE and resulted in enrichment of racemic compounds, which was attributed to amino acid Schiff base chiral complex mechanisms of PE. The three pairs of Cu complex structures were characterized by UV-vis, MS and X-ray photoelectron spectroscopy (XPS). All chiral properties were studied by circular dichroism (CD) in the solid and liquid. Full article
(This article belongs to the Special Issue Coordination Cluster Compounds)
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