Two novel lead-based coordination polymers for luminescence sensing of anions, cations and small organic molecules.

Two novel lead-based coordination polymers, namely [Pb(cbdcp)]·0.5HO·0.5CHOH (1) and [Pb(cbdcp)] (2), have been solvothermally constructed by using a zwitterionic ligand 4-carboxy-1-(3,4-dicarboxy-benzyl)-pyridinium chloride (abbreviated as HcbdcpCl). Compound 1 has a three-dimensional framework displaying a valence-bonded SrAl topology with the 4·6·8 symbol, while compound 2 has a two-dimensional sheet structure that can be simplified into a three-dimensional ππ interaction-connected topology with the {4·6}{4·6·8} symbol. Notably, compound 1 proved to be a promising potential luminescent sensor capable of selectively detecting anions, cations and small organic molecules, especially CrO, CrO, Fe and nitrobenzene.