科研之友
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摘要
A new type of 18-metallacrown-6, [Fe-6(H2O)(6)L-6] (L = 1-(2-hydroxy-benzoyl)-thiosemicarbazide), has been prepared and characterized. The backbone of this metal-organic assembly is the double-azathiacrown, which is formed by six repeating units of the five-membered rings [Fe-S-C-N-N]. It is the first metal complex containing a double-azathiacrown. Due to the meridional coordination of the ligand to the Fe3+ ion, the ligand enforces the stereochemistry of the Fe3+ ions as a propeller configuration with alternating Lambda/Delta forms. Antibacterial screening data showed that the metallacrown has strong antimicrobial activity against Escherichia coli and Staphylococcus aureus.
