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Synthesis, Modeling, Physico-Chemical and Biological Properties of Metal Complexes
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Synthesis, Modeling, Physico-Chemical and Biological Properties of Metal Complexes

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

Deadline for manuscript submissions: 30 June 2024 | Viewed by 780

Special Issue Editor

Dr. Monika Kalinowska

E-Mail Website
Guest Editor
Department of Chemistry, Biology and Biotechnology, Institute of Environmental Engineering and Energetics, Faculty of Civil Engineering and Environmental Sciences, Białystok University of Technology, Wiejska 45E Street, 15-351 Bialystok, Poland
Interests: polyphenols; metal–base complexes; structural and coordination chemistry; antioxidant and antimicrobial agents; plant extracts; spectroscopy; HPLC
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Special Issue Information

Dear Colleagues,

This Special Issue is focused on metal complexes and their synthesis, modeling, and physico-chemical and biological characterization. As metal complexes play a significant role in various scientific fields such as biology, chemistry, and materials science, a better understanding of their characteristics can contribute to the creation of novel materials, catalytic systems, and therapeutic agents. In biological studies, metal complexes can exhibit unique and valuable properties that make them suitable for a range of biomedical applications, such as drug development, imaging, and therapeutic agents.

The synthesis of metal complexes involves the combination of metal ions with ligands, which can be organic molecules or inorganic species. A wide range of metal complex structures can be generated using various synthetic approaches such as organometallic chemistry and coordination chemistry.

Quantum mechanics and computational chemistry as modeling techniques promote an understanding of electronic and structural properties as well as provide insights into the spectroscopic features, bonding nature, and catalytic activity of metal complexes.

Physico-chemical characterization techniques of metal complexes include X-ray crystallography, nuclear magnetic resonance spectroscopy, infrared spectroscopy, Raman spectroscopy, UV/Vis spectroscopy, thermogravimetric analysis and mass spectrometry and others. These analyses are utilized to determine the stability, structure, and reactivity of these materials.

The aim of this Special Issue is to publish outstanding papers that cover the latest progress in the field of metal complexes. Submissions of original research articles, reviews, and short communications related to the subject are welcome.

Dr. Monika Kalinowska
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. 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

  • metal complexes
  • coordination chemistry
  • organometallic chemistry
  • ligands
  • synthesis
  • modeling
  • physico-chemical characterization
  • biological characterization

Published Papers (1 paper)

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Research

17 pages, 3440 KiB  
Article
Structure, Antioxidant Activity and Antimicrobial Study of Light Lanthanide Complexes with p-Coumaric Acid
by Grzegorz Świderski, Ewelina Gołębiewska, Natalia Kowalczyk, Monika Kalinowska, Renata Świsłocka, Elżbieta Wołejko, Urszula Wydro, Piotr Malinowski, Anna Pietryczuk, Adam Cudowski, Waldemar Priebe and Włodzimierz Lewandowski
Materials 2024, 17(6), 1324; https://doi.org/10.3390/ma17061324 - 13 Mar 2024
Viewed by 601
Abstract
This paper presents the results of a study of the effects of the lanthanide ions Ce3+, Pr3+, Nd3+ and Sm3+ on the electronic structure and antioxidant and biological (antimicrobial and cytotoxic) properties of p-coumaric acid (p-CAH2 [...] Read more.
This paper presents the results of a study of the effects of the lanthanide ions Ce3+, Pr3+, Nd3+ and Sm3+ on the electronic structure and antioxidant and biological (antimicrobial and cytotoxic) properties of p-coumaric acid (p-CAH2). Structural studies were conducted via spectroscopic methods (FTIR, ATR, UV). Thermal degradation studies of the complexes were performed. The results are presented in the form of TG, DTG and DSC curves. Antioxidant properties were determined via activity tests against DPPH, ABTS and OH radicals. The reducing ability was tested via CUPRAC assays. Minimum inhibitory concentrations (MICs) of the ligand and lanthanide complexes were determined on E. coli, B. subtilis and C. albicans microorganisms. The antimicrobial activity was also determined using the MTT assay. The results were presented as the relative cell viability of C. albicans, P. aeruginosa, E. coli and S. aureus compared to controls and expressed as percentages. In the obtained complexes in the solid phase, lanthanide ions coordinate three ligands in a bidentate chelating coordination mode through the carboxyl group of the acid. Spectroscopic analysis showed that lanthanide ions increase the aromaticity of the pi electron system of the ligand. Thermal analysis showed that the complexes are hydrated and have a higher thermal stability than the ligand. The products of thermal decomposition of the complexes are lanthanide oxides. In the aqueous phase, the metal combines with the ligand in a 1:1 molar ratio. Antioxidant activity tests showed that the complexes have a similar ability to remove free radicals. ABTS and DPPH tests showed that the complexes have twice the ability to neutralise radicals than the ligand, and a much higher ability to remove the hydroxyl radical. The abilities of the complexes and the free ligand to reduce Cu2+ ions in the CUPRAC test are at a similar level. Lanthanide complexes of p-coumaric acid are characterised by a higher antimicrobial capacity than the free ligand against Escherichia coli bacteria, Bacillus subtilis and Candida albicans fungi. Full article
(This article belongs to the Special Issue Synthesis, Modeling, Physico-Chemical and Biological Properties of Metal Complexes)
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