Synthesis and characterization of Anderson-Evans type polyoxometalates, antibacterial properties
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2023
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Abstract
In the present work, the new aluminium-substituted polyoxometalates of the Anderson-Evans type have been prepared and structurally defined by the reaction of aluminium (III) chloride hexahydrate and sodium tungstate dihydrate/sodium molybdate dihydrate in an aqueous basic medium. Elemental analysis, FT-IR, TGA, 1H NMR, and 31P NMR analysis revealed that these polyoxometalates had the following formula: $[Ph_4P]_3[Al(OH)_6Mo_6O_{18}]$·$4H_2O 1$, $[Ph_4P]_3[Al(OH)_6W_6O_{18}]$·$_4H2O 2,$ $[C_ 7H_{10}N]_3[Al(OH)_6Mo_6O_{18}]$·$4H_2O 3$, $[C_7H_{10}N]_3[Al(OH)_6W_6O_{18}]$·$4H_2O 4$. The compounds 1 and 2 show promising antibacterial activity against gram-positive Staphylcoccus aureus ATCC 25923 and gram-negative Escherichia coli ATCC 25922 bacteria.