Synthesis, characterization and photoluminescence studies of new Cu(II) complex

Abstract

In the current work, a new coordination complex, [Cu(HL)(2)], 1 [H2L = 2-((E)-(2-hydroxypropylimino) methyl)-4-nitrophenol] was successfully synthesized and characterized by IR, UV-vis and photoluminescence spectroscopic techniques, single crystal and powder X-ray diffraction measurements. In the crystalline structure of complex 1, the aliphatic -OH group of the ligand is not coordinated and points away from the metal coordination zone, and also actively participates in intermolecular bifurcated O-H center dot center dot center dot O hydrogen bonds which link the molecules to form hydrogen-bonded linear chains. C-H center dot center dot center dot pi and pi center dot center dot center dot pi contacts also connect the molecules in the structure which form to 3D structure. This hydrogen bonded polymeric networks lie in the bc-plane and stacks along to the a-axis. Furthermore, complex 1 and its ligand H2L display an intense navy-blue emission and blue emission in the solid state at room temperature, respectively, when they are excited under UV light.