Two copper(II) complexes with 4-benzoylpyridine ligand: Synthesis, crystal structure and luminescent properties

Two new copper(II) complexes Cu(NCS)2(4-Bzpy)2 (1) and Cu(NO3)2(4-Bzpy)4 (2) (4-Bzpy = 4-benzoylpyridine) have been synthesized and characterized by IR, UV, elemental analysis and X-ray crystallography. Cu(II) atom has a square planar environment for 1 and an distorted octahedral environment for 2, respectively. In solid state there are C–H⋯π interactions and C–H⋯S hydrogen bonds between adjacent molecules in complex 1. The molecule of complex 2 is further connected by multiform π–π interactions, C–H⋯π interactions and C–H⋯O hydrogen bonds to form a three-dimensional supramolecular structure. The luminescent properties of the complexes 1 and 2 were both investigated in H2O solution and in solid state at room temperature, respectively.

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► Two new copper(II) complexes have been synthesized.
► IR, UV, elemental analysis for the complexes.
► X-ray single-crystal structure analyses and discussion for the complexes.
► The luminescent properties of the complexes in H2O solution and in solid state.