The 2-(1H-imidazol-1-yl) acetic acid (Hima)， 4,4’-bpy, reacts with metal ions Pb(NO3)2 and AgNO3 respectively. Finally, ［Pb2(4,4’-bipy)(ima)(NO3)3］n (1, 3D framework) and ［Ag4(4, 4’-bipy)3(ima)2(NO3)2(H2O)2］n (2, 3D framework) coordination polymers were obtained. Based on the structural characterizations of the corresponding compounds, their chemical and physical properties, such as photoluminescence was investigated. The solid-state photoluminescence spectra of 1 and 2 at room temperature are observed to have their main emission at 552 nm and 444 nm (λex=346 nm for 1, 369 nm for 2), respectively, which is mainly assigned to the ligand-metal charge transfer (LMCT).