Rate this Article: Synthesis, Characterization and Antimicrobial Activity Studies of Mixed-1,10-phenanthroline-Mn(II),Co(II), Cu(II), Ni(II) and Hg(II) Complexes with Schiff Base[2,2-(1Z,1Z)-(biphenyl-4,4-diylbis(azan-1-yl-1-ylidene))bis(methan-1-yl-1-ylidene)diphenol]