Biopolymers and Polymer Sciences

The synthesis and crystal structure of a novel polymeric silver(I)-iron(II) complex containing bridging ligand 4’-(4-(2,2,2-tris(1H-pyrazol-1-ido)ethoxymethyl)phenyl-2,2’:6’,2”-terpyridine (TPT) are described. The reaction of TPT with FeCl2.6H2O afforded a complex [Fe(TPT)2]Cl2 which in turn reacted with a range of silver salts such as AgNO3, AgClO4 resulted in the formation of hetero-metal complexes which were characterized using 1H NMR and ES-MS techniques. The reaction solution of the [Fe(TPT)2]Cl2 complex with molar equivalent of AgClO4 resulted in a solution with face needlelike crystals suitable for single X-ray crystallography. The complex was crystallized the triclinic space group, PÄ«. The smallest repeating unit of the complex contains an [Fe(TPT)Ag2(H2O)2](ClO4)3 unit. The Fe atom is coordinated by three nitrogen of terpyridine moiety from one TPT ligand and by three nitrogen of terpyridine moiety from another TPT ligand in an octahedral geometry fashion. While one Ag atom is coordinated by two nitrogen atoms of one pyrazolyl moiety from a TPT ligand and two nitrogen atoms of adjacent pyrazolyl moiety from another TPT ligand to generate a linear coordination polymer in a tetragedral geometry. The third nitrogen atom of the last pyrazolyl part is also coordinated to a silver ion which was itself coordinated to two water molecules through their oxygen atoms in a trigonal planar geometry. The shortest Ag-Ag distance is 5.337(1) Å within a TPT ligand. The Fe-Ag distances are 10.480(1) Å, 15.0637(1) Å within a unit cell. In vitro the study of the complex against some bacterial pathogens were also investigated.