Two novel lead(ii) coordination complexes incorporating phenanthroline derivate: Synthesis and characterization

Two lead(ii) coordination complexes with 2-(4-fluoro-phenyl)-1H-imidazo[4,5-f][1,10]phenanthroline formulated as [Pb(L)(2)(tlba)(2))] (1) and [Pb(L)(dpea)](2) (2) (HTLBA = 2,3,4,5-tetrachlorobenzoic acid, H(2)dpea = diphenic acid) were synthesized under hydrothermal conditions. In 1, the neighboring [Pb(L)(2)(tlba)(2))] molecules formed into a two-dimensional (2D) layer structure with C-Cl?p interactions and N-H?O hydrogen bond interactions. For 2, Pb1 and Pb1(i) ions are connected by four carboxylate groups from two dpea anions to yield a binuclear unit. Two L ligands are situated in two flanks of the dimer. The L ligands from dimers in the vicinity pile up by two p-p interactions to form a 2D supramolecular structure. Moreover, PXRD of 2 was also studied.