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Transition Metal Complexes with Bioactive Ligands

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

Deadline for manuscript submissions: 16 January 2026 | Viewed by 550

Special Issue Editor

Special Issue Information

Dear Colleagues,

Bioactive ligands are small molecules known for their strong and selective interactions with biological targets such as cancer cells, free radicals, bacteria, and viruses. When coordinated to transition metals (e.g., Cu, Fe, Zn, Pd, Sn, Ni, Ru), these ligands often form complexes with enhanced biological activity, stability, and selectivity. Understanding their structural, electronic, and spectroscopic properties is essential for advancing their application in medicinal and materials chemistry.

This Special Issue invites original articles and reviews that include comprehensive spectroscopic and theoretical chemistry methods—such as Density Functional Theory (DFT), Natural Bond Orbital (NBO) analysis, Quantum Theory of Atoms in Molecules (QTAIM), Molecular Docking, and Molecular Dynamics simulations—to study the stability, reactivity, complexation modes, and interactions of bioactive ligands and their metal complexes. We particularly encourage integrated studies combining theory with experimental data, including spectroscopic assignments and mechanistic interpretations. Articles focusing on QSAR modeling and in silico screening of new compounds are also welcome. By bringing together diverse approaches, this Special Issue aims to deepen our understanding of how structure, reactivity, and biological function are connected in bioactive coordination compounds.

Dr. Dušan Dimić
Guest Editor

Manuscript Submission Information

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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
  • DFT
  • QTAIM
  • biological activity
  • bioactive ligands
  • crystal structures

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Published Papers (1 paper)

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Research

25 pages, 2959 KB  
Article
Synthesis, Characterization, HSA/DNA Binding, and Cytotoxic Activity of [RuCl26-p-cymene)(bph-κN)] Complex
by Stefan Perendija, Dušan Dimić, Thomas Eichhorn, Aleksandra Rakić, Luciano Saso, Đura Nakarada, Dragoslava Đikić, Teodora Dragojević, Jasmina Dimitrić Marković and Goran N. Kaluđerović
Molecules 2025, 30(15), 3088; https://doi.org/10.3390/molecules30153088 - 23 Jul 2025
Viewed by 379
Abstract
A novel ruthenium(II) complex, [RuCl26-p-cymene)(bph-κN)] (1), was synthesized and structurally characterized using FTIR and NMR spectroscopy. Density functional theory (DFT) calculations supported the proposed geometry and allowed for comparative analysis of experimental and [...] Read more.
A novel ruthenium(II) complex, [RuCl26-p-cymene)(bph-κN)] (1), was synthesized and structurally characterized using FTIR and NMR spectroscopy. Density functional theory (DFT) calculations supported the proposed geometry and allowed for comparative analysis of experimental and theoretical spectroscopic data. The interaction of complex 1 with human serum albumin (HSA) and calf thymus DNA was investigated through fluorescence quenching experiments, revealing spontaneous binding driven primarily by hydrophobic interactions. The thermodynamic parameters indicated mixed quenching mechanisms in both protein and DNA systems. Ethidium bromide displacement assays and molecular docking simulations confirmed DNA intercalation as the dominant binding mode, with a Gibbs free binding energy of −34.1 kJ mol−1. Antioxidant activity, assessed by EPR spectroscopy, demonstrated effective scavenging of hydroxyl and ascorbyl radicals. In vitro cytotoxicity assays against A375, MDA-MB-231, MIA PaCa-2, and SW480 cancer cell lines revealed selective activity, with pancreatic and colorectal cells showing the highest sensitivity. QTAIM analysis provided insight into metal–ligand bonding characteristics and intramolecular stabilization. These findings highlight the potential of 1 as a promising candidate for further development as an anticancer agent, particularly against multidrug-resistant tumors. Full article
(This article belongs to the Special Issue Transition Metal Complexes with Bioactive Ligands)
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