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

摘要

An independent self-assembling heterobimetallic [Ni(II)—Eu(III)] salamo-like coordination polymer, QO[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(nitrilo-methylidyne)]diphenol), Ni(OAc)2 · 4H20, Eu(NO3)3 · 6H2O, 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, π---π stacking and С—Н---π 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.