Synthesis, structural characterization, superoxide dismutase and antimicrobial activities studies of copper (II) complexes with 2-(E)-(2-(2-aminoethylamino) methyl)-4-bromophenol and (19E, 27E)-N 1 , N 2 -bis (phenyl (pyridine-2-yl)-methylene)-ethane-1, 2-diamine as ligands