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 AgNO3 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 MnFe2O4 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.

Automated summary

Two new coordination polymers were successfully synthesized by reacting AgNO3 and cyanide with two ligands, for the preparation of magnetic nanocomposites. These materials showed high antibacterial activity against Gram-negative and Gram-positive bacteria, with simple separation and recyclable properties suitable for biological applications.