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    Sodium salt of boron-substituted first keggin-type polyoxometalate; synthesis, crystal structure and investigation of antimicrobial activities
    (Pergamon-Elsevier Science Ltd, 2025) Besli, Erdem; Colak, Ferdag; Sahin, Onur; Dikim, Selinsu; Colak, Alper Tolga
    This study aims to investigate the antimicrobial activity of the boron-containing polyoxometalate (BPOM) Na7[H1.5BW12O40]center dot 6en (1), synthesized as a single crystal. The structural and thermal properties of this novel BPOM were thoroughly analyzed using FT-IR, TGA, and X-ray diffraction (XRD) techniques. The incorporation of boron into these structures is believed to enhance their antimicrobial properties. The antimicrobial activity of the compound was evaluated against two Gram-positive bacteria (Staphylococcus aureus, Bacillus cereus), three Gramnegative bacteria (Escherichia coli, Legionella spp., Legionella pneumophila sg 2-15), and a yeast (Candida albicans) using disc diffusion and tube dilution (Minimal Inhibition Concentration) methods. The results demonstrated that the synthesized compound exhibited significant antimicrobial activity, particularly against Bacillus cereus (Gram-positive) and Legionella spp. and Legionella pneumophila sg 2-15 (Gram-negative).