Three rare heteromultinuclear 3d-4f salamo-like complexes constructed from auxiliary ligand 4,4′-bipy: Syntheses, structural characterizations, fluorescence and antimicobial properties

Three rare heteromultinuclear complexes, (infinity)[NiL(4,4 '-bipy)Pr (NO3)(3)]center dot(CH3)(2)CHOH (1), [{CuLSm (NO3)(3)}(2)(4,4 '-bipy)]center dot CH3OH (2) and [{CuL (CH3CH2OH)Eu (NO3)(3)] (3) with a symmetrical salamo-like hexadentate ligand H2L have been synthesized, and characterized by FT-IR, UV-vis and X-ray crystallography. Complex 1 is a 1D coordination polymer constructed from heterobimetallic [Ni(L)Pr (NO3)(3)] units which are connected by the exo-dentate ligand 4,4 '-bipy bearing nitrogen-donor atoms. Complex 2 is a heterotetranuclear dimer based on [Cu(L)Sm (NO3)(3)] moieties which are linked through the exo-dentate 4,4 '-bipy hasing nitrogen-donor atoms. Complex 3 is a heterodinuclear structure, Cu (II) atom is five-coordinate possessing a distorted square pyramidal geometry, and Eu (III) atom is a deca-coordinate adopting a distorted bicapped square antiprism. In addition, fluorescence and antimicobial properties of the ligand H2L and its complexes 1-3 have also been discussed.