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Structures and Applications of Transition Metal Complexes
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Structures and Applications of Transition Metal Complexes

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

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 3454

Special Issue Editor

Dr. Bing Hu

E-Mail Website
Guest Editor
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
Interests: metal cluster; organic-inorganic hybrid material; coordination polymer

Special Issue Information

Dear Colleagues,

In view of the importance of a wide variety of applications which have originated from the transition of metal ions and the structural tunability of organic components, transition metal complexes have recently attracted the attention of researchers in many fields of chemistry and materials. This Special Issue aims to highlight important approaches and recent progress in the field of transition metal complexes, mostly in terms of structure characterization and application research of transition metal complexes. Researchers are invited to present their novel ideas that we hope will potentially shape the future of these areas. In order to ensure the scope of our Special Issue is both focused and inspiring, we welcome submissions from all over the world and encourage submissions covering various transition metal complexes-related topics, including (but not limited to) structural chemistry, inorganic synthesis, catalysis, magnetism, photophysics, and photochemistry.

Dr. Bing Hu
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. 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

  • transition metal complexes
  • structure
  • application
  • synthesis
  • catalysis
  • magnetism
  • photo functionality

Published Papers (3 papers)

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Research

14 pages, 2163 KiB  
Article
On the Fragmentation of Ni(II) β-Diketonate-Diamine Complexes as Molecular Precursors for NiO Films: A Theoretical and Experimental Investigation
by Cristiano Invernizzi, Gloria Tabacchi, Roberta Seraglia, Mattia Benedet, Marco Roverso, Chiara Maccato, Sara Bogialli, Davide Barreca and Ettore Fois
Molecules 2024, 29(3), 642; https://doi.org/10.3390/molecules29030642 - 30 Jan 2024
Viewed by 807
Abstract
NiO-based nanomaterials have attracted considerable interest for different applications, which have stimulated the implementation of various synthetic approaches aimed at modulating their chemico-physical properties. In this regard, their bottom-up preparation starting from suitable precursors plays an important role, although a molecular-level insight into [...] Read more.
NiO-based nanomaterials have attracted considerable interest for different applications, which have stimulated the implementation of various synthetic approaches aimed at modulating their chemico-physical properties. In this regard, their bottom-up preparation starting from suitable precursors plays an important role, although a molecular-level insight into their reactivity remains an open issue to be properly tackled. In the present study, we focused on the fragmentation of Ni(II) diketonate-diamine adducts, of interest as vapor-phase precursors for Ni(II) oxide systems, by combining electrospray ionization mass spectrometry (ESI-MS) with multiple collisional experiments (ESI-MSn) and theoretical calculations. The outcomes of this investigation revealed common features in the fragmentation pattern of the target compounds: (i) in the first fragmentation, the three complexes yield analogous base-peak cations by losing a negatively charged diketonate moiety; in these cations, Ni-O and Ni-N interactions are stronger and the Ni positive charge is lower than in the parent neutral complexes; (ii) the tendency of ligand electronic charge to migrate towards Ni further increases in the subsequent fragmentation, leading to the formation of a tetracoordinated Ni environment featuring an interesting cation-π intramolecular interaction. Full article
(This article belongs to the Special Issue Structures and Applications of Transition Metal Complexes)
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15 pages, 4558 KiB  
Article
Electrochemical Water Oxidation and CO2 Reduction with a Nickel Molecular Catalyst
by Hengxin Jian, Mengyu Lu, Haowen Zheng, Shengrui Yan and Mei Wang
Molecules 2024, 29(3), 578; https://doi.org/10.3390/molecules29030578 - 24 Jan 2024
Viewed by 1037
Abstract
Mimicking the photosynthesis of green plants to combine water oxidation with CO2 reduction is of great significance for solving energy and environmental crises. In this context, a trinuclear nickel complex, [NiII3(paoH)6(PhPO3)2]·2ClO4 ( [...] Read more.
Mimicking the photosynthesis of green plants to combine water oxidation with CO2 reduction is of great significance for solving energy and environmental crises. In this context, a trinuclear nickel complex, [NiII3(paoH)6(PhPO3)2]·2ClO4 (1), with a novel structure has been constructed with PhPO32− (phenylphosphonate) and paoH (2-pyridine formaldehyde oxime) ligands and possesses a reflection symmetry with a mirror plane revealed by single-crystal X-ray diffraction. Bulk electrocatalysis demonstrates that complex 1 can homogeneously catalyze water oxidation and CO2 reduction simultaneously. It can catalyze water oxidation at a near-neutral condition of pH = 7.45 with a high TOF of 12.2 s−1, and the Faraday efficiency is as high as 95%. Meanwhile, it also exhibits high electrocatalytic activity for CO2 reduction towards CO with a TOF of 7.84 s−1 in DMF solution. The excellent electrocatalytic performance of the water oxidation and CO2 reduction of complex 1 could be attributed to the two unique µ3-PhPO32− bridges as the crucial factor for stabilizing the trinuclear molecule as well as the proton transformation during the catalytic process, while the oxime groups modulate the electronic structure of the metal centers via π back-bonding. Therefore, apart from the cooperation effect of the three Ni centers for catalysis, simultaneously, the two kinds of ligands in complex 1 can also synergistically coordinate the central metal, thereby significantly promoting its catalytic performance. Complex 1 represents the first nickel molecular electrocatalyst for both water oxidation and CO2 reduction. The findings in this work open an avenue for designing efficient molecular electrocatalysts with peculiar ligands. Full article
(This article belongs to the Special Issue Structures and Applications of Transition Metal Complexes)
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21 pages, 3108 KiB  
Article
The Hydrolytic Activity of Copper(II) Complexes with 1,4,7-Triazacyclononane Derivatives for the Hydrolysis of Phosphate Diesters
by Michaela Buziková, Robert Willimetz and Jan Kotek
Molecules 2023, 28(22), 7542; https://doi.org/10.3390/molecules28227542 - 11 Nov 2023
Viewed by 1045
Abstract
A set of substituted 1,4,7-triazacyclononane ligands was synthesised, including a wide series of novel derivatives bearing a thiazole or thiophene side group, with the potential to incorporate these derivatives into a polymeric material; some previously known/studied ligands were also synthesised for comparative purposes. [...] Read more.
A set of substituted 1,4,7-triazacyclononane ligands was synthesised, including a wide series of novel derivatives bearing a thiazole or thiophene side group, with the potential to incorporate these derivatives into a polymeric material; some previously known/studied ligands were also synthesised for comparative purposes. The corresponding copper(II) complexes were prepared, and their ability to mediate the hydrolysis of phosphate ester bonds was studied via UV-Vis spectrophotometry, using bis(p-nitrophenyl)phosphate as a model substrate. Some of the prepared complexes showed a considerable enhancement of the phosphate ester hydrolysis in comparison with previously studied systems, which makes them some of the most effective complexes ever tested for this purpose. Therefore, these novel, potentially bifunctional systems could provide the possibility of creating new coating materials for medicinal devices that could prevent biofilm formation. Full article
(This article belongs to the Special Issue Structures and Applications of Transition Metal Complexes)
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