Three novel azo-azomethine ligands have been synthesized in an accomplished one-pot synthesis protocol. The mononuclear Ru(II) complexes of these azo-azomethine dyes were prepared and characterized by the combination of elemental analyses, IR, UV-Visible spectroscopy and H-1-C-13 NMR spectra. Solid state structures of 3, 4 and 7 were determined by single crystal X-ray diffraction studies. The electrochemical and photoluminescence properties of the compounds were studied. The 1931 CIE (x, y) chromaticity coordinates of the ligands and their metal complexes were investigated and the x, y values of the compounds were found to be close to the National Television Standard Committee (NTSC) standard. Quantum chemical calculation of related ligands and complexes are performed at B3LYP/6-31G(d, p) and B3LYP/6-31G(d, p) (LANL2DZ) level in vacuum.