Simple synthesis of novel magnetic silver polymer nanocomposites with a good separation capacity and intrinsic antibacterial activities with high performance

Two new coordination polymers namely, [(AgCN) 4 L S ] n ( 1 ) and [(AgCN) 3 L N ] n ( 2 ), were successfully synthesized by the reaction of AgNO 3 and cyanide as a co-anion with L S [1,1′-(hexane-1,4-diyl)bis(3-methylimidazoline-2-thione] and L N [1,1,3,3-tetrakis(3,5-dimethyl-1-pyrazole)propane] ligands in order to use them for the preparation of magnetic nanocomposites with MnFe 2 O 4 nanoparticles by an efficient and facile method. They were then well characterized via numerous techniques, including elemental analysis, FT-IR spectroscopy, TGA, PXRD, SEM, TEM, EDX, VSM, BET, ICP, and single-crystal X-ray diffraction. The considered polymers and their magnetic nanocomposites with nearly the same antibacterial activity demonstrated a highly inhibitive effect on the growth of Gram-negative ( Escherichia coli , Pseudomonas aeruginosa ) and Gram-positive ( Staphylococcus aureus , Bacillus subtilis ) bacteria. By considering the simple separation and recyclable characters of the magnetic nanocomposites, these materials are suitable to be used in biological applications. Two new nanocomposites containing the MnFe 2 O 4 of the unprecedented Ag complexes with N- and S-donor ligands were synthesized. The nanocomposites can be prepared by a simple procedure and use efficiently for antibacterial activity and other purposes.