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Copper(II) carboxylate complexes [Cu(OOCR)L] () and [Cu(OOCR`)OCO(R`)CuL] (), where = 2-methyl pyridine, = 2-chlorophenyl acetate and R` = 2-fluorophenyl acetate were synthesized and characterized by FT-IR spectroscopy and single crystal X-ray analysis. Complex exhibits the typical paddlewheel array of a dinuclear copper(II) complex with carboxylate ligands. In complex , this scaffold is further extended into a polymeric arrangement based on alternate paddlewheel and square planar moieties with distinct coordination spheres. The complexes showed better 2,2-diphenyl-1-picrylhydrazyl (DPPH) and hydroxyl radical scavenging activities and have been found to be more potent antileishmanial agents than their corresponding free ligand acid species. UV-Vis absorption titrations revealed good DNA binding abilities {Kb = 9.8 × 10 M () and 9.9 × 10 M ()} implying partial intercalation of the complexes into DNA base pairs along with groove binding. The complexes displayed cytotoxic activity against malignant glioma U-87 (MG U87) cell lines. Computational docking studies further support complex-DNA binding by intercalation. Molecular docking investigations revealed probable interactions of the complexes with spike protein, the nucleocapsid protein of SARS-CoV-2 and with the angiotensin converting enzyme of human cells.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8716173 | PMC |
| http://dx.doi.org/10.1016/j.molstruc.2021.132308 | DOI Listing |
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