its Cu (II), Ni (II), Co (II), and Fe (II) complexes have been prepared. Their chemical
structures were characterized by elemental analysis, molar conductivity, FT-IR, UV–Vis,
TGA, LC-MS/MS, 1 H and 13 C NMR (for ligand). Also, the photoluminescence properties of
the free ligand and its metal complexes were investigated in DMF solution. The ligand is
emissive at 430–630 nm range and the emission band is almost turned off upon …