Abstract
Two newly designed dinuclear ZnII and CoII complexes [Co2(L)2]·H2O (1) and [Zn2(L)2]·H2O (2) of a coumarin-based N2O2-donor ligand H2L (5′-(N,N′-diethylamino)-6′-methyl-2,2′-[ethylenedioxybis(nitrilomethylidyne)]phenolcoumarinphenol) were synthesized and characterized by physicochemical and spectroscopic methods. Complexes 1 and 2 are extremely rare asymmetric binuclear structures. The structures of complexes 1 and 2 are isostructural. In both complexes, one metal atom (Co2 or Zn1) adopts a twisted square pyramid configuration, while another metal atom (Co1 or Zn2) adopts a twisted triangular bipyramid configuration with penta-coordination. In addition, complexes 1 and 2 form 3D supramolecular structures through intermolecular hydrogen bonding interactions. Furthermore, the Hirshfeld surfaces analyses and fluorescence properties of complexes 1 and 2 have been discussed in detail.
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