Synthesis, crystal structure and excellent photoluminescence properties of copper (II) and cobalt (II) complexes with Bis(1[(4-butylphenyl)imino]methyl naphthalen-2-ol) Schiff base

摘要

Copper (II) and Cobalt (II) metal complexes (4a- and4b-complexes) using Schiff base ligand 1-[(4-butylphenyl)imino]methyl naphthalen-2-ol (3) have been synthesized. The single crystals of Copper (II) and Cobalt (II) complex phosphors were grown and characterized by Fourier-Transform Infrared (FT-IR), single crystal X-ray diffraction (XRD), SEM (Scanning Electron Microscope) and EDS (Energy Dispersive X-ray spectroscopy). Photoluminescence study of the phosphors revealed the presence of excitation peaks at 333?nm and 360?nm for4a-complex (λemi?=?495?nm) and excitation peaks at 300?nm and 360?nm for4b-complex (λemi?=?496?nm). The calculated CCT values of the complexes pointed out that these materials can be used to obtain cold white light from the light emitting devices. Diffuse reflectance spectra (DRS) showed the measured band gap energies of 1.78?eV and 1.44?eV for Cu (II) and Co (II) complexes, respectively. It is concluded that the4a- and4b-complexes become white and blue green light emitting diodes respectively and will be useful in the development of strong electroluminescent materials.