STRUCTURALLY CHARACTERIZED SELF-ASSEMBLED HETEROBIMETALLIC Ni(II)-Eu(III)-SALAMO-BIPYRIDINE COORDINATION POLYMER: SYNTHESIS, PHOTOPHYSICAL AND ANTIMICROBIAL PROPERTIES

An independent self-assembling heterobimetallic [Ni(II)-Eu(III)] salamo-like coordination polymer, (1)(infinity)[Ni(L)Eu(NO3)(3)(4,4 '-bipy)], is synthesized by the one-pot reaction of a symmetrical salamo-like hexadentate ligand (H2L = 6,6 '-dimethoxy-2,2 '-[1,2-ethylenedioxybis(nitrilomethylidyne)]diphenol), Ni(OAc)(2 center dot)4H(2)O, Eu(NO3)(3 center dot)6H(2)O, and 4,4 '-bipy. The coordination polymer is obtained by the reaction in the 1:1:1:1 ratio and characterized by elemental analyses, IR and UV-Vis absorption spectra, and single crystal X-ray diffraction. The newly synthesized polymer is constructed from heterobimetallic [Ni(II)(L)Eu(III)] units connected by the 4,4 '-bipy exodentate ligand bearing N donor atoms. Meanwhile, the hydrogen bonding, pi center dot center dot center dot pi stacking and C-H center dot center dot center dot pi interactions play an important role in the structure of the coordination polymer. In terms of the antibacterial activity, the polymer dissolved in DMF has a good antibacterial effect on Staphylococcus aureus.