Synthesis and Characterization of Two Pb(II) Complexes of 2,2'-dihydroxy, Dimethoxy-1,1'-binaphthyl-3,3'-dicarboxylic Acid

摘要

Two new complexes {[Pb(L')(DMSO)_2(H_2O)]-DMF}_n (1, L~1 = 2,2'-dihydroxy-l,l'-dinaphthyl-3,3'-dicarboxylate) and {[Pb(L~2)(DMS O)-DMSO}_n (2, L~2 = 2,2'-dimethoxy-l,l' -dinaphthyl-3,3' -dicarboxylate) have been synthesized under mild conditions and structurally characterized. Crystal structural analysis reveals that complex 1 adopts a ID infinite chain structure which forms 2D sheet by hydrogen bonds interactions. Complex 2 possesses a 2D sheet structure, which was further assembled into a 3D supramolecular network through the π-π weak interactions. IR spectra indicates the carboxyl group coordinates with the Pb~(2+) ion. TGA shows that complex 2 is highly thermally stable up to 120° C.