A novel copper formate-based framework RbCu(HCO2)2Cl: synthesis, crystal structure, thermal, vibrational and magnetic properties and antibacterial activity
In this contribution, we report on the synthesis and characterization of a novel biologically active Cu(II)-based paddle-wheel (PW) metal–organic framework (MOF), RbCu(HCO2)2Cl (1). Single-crystal X-ray diffraction results confirmed a monoclinic unit cell with space group P21/n and the Rb+ cation as...
| Autores: | , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad de Castilla-La Mancha |
| Repositorio: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/47230 |
| Acceso en línea: | https://doi.org/10.1039/D5MA01055A https://pubs.rsc.org/en/content/articlelanding/2026/ma/d5ma01055a https://hdl.handle.net/10578/47230 |
| Access Level: | acceso abierto |
| Palabra clave: | novel copper formate-based framework RbCu(HCO2)2Cl synthesis crystal structure thermal vibrational and magnetic properties antibacterial activity |
| Sumario: | In this contribution, we report on the synthesis and characterization of a novel biologically active Cu(II)-based paddle-wheel (PW) metal–organic framework (MOF), RbCu(HCO2)2Cl (1). Single-crystal X-ray diffraction results confirmed a monoclinic unit cell with space group P21/n and the Rb+ cation as a counter-balanced ion located in the cavities of the framework of the dinuclear copper–copper dimer formed by a PW-arrangement of formate anions in the syn–syn configuration. Each Cu(II) atom has a square-pyramidal environment with a Cu⋯Cu intramolecular distance of 2.7070 (7) Å. The IR spectrum confirms the existence of the formate anion (HCO2−). Magnetic susceptibility experiments, performed from 5 to 300 K, revealed a strong antiferromagnetic coupling (J = −531 cm−1) between the two Cu2+ ions linked by four formate groups. The powder EPR spectra show the typical lines of the triplet state (S = 1) with significant zero-field splitting, attributed to Cu2+–Cu2+ dimers. In vitro antibacterial activity was evaluated against two Gram-positive bacteria (Staphylococcus aureus CECT 86 and Listeria monocytogenes CECT 4031) and two Gram-negative bacteria (Escherichia coli CECT 99 and Klebsiella pneumoniae CECT 143T). The studies revealed that MOF 1 exhibits both bacteriostatic and bactericidal activity against all the microorganisms analyzed, making it a potential candidate for treating bacterial infections. The obtained findings provide more insight into the interesting properties of Cu-based frameworks and antibacterial activity. |
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