Syntheses, crystal structures and fluorescent properties of three coordination polymers assembled from flexible bis-(imidazole-4,5-dicarboxylate) ligand and d10/s2 metal ions

Abstract Three new coordination polymers, [Zn(H 2 L 2 )(H 2 O)] n ( 1 ), [Cd(H 2 L 2 )(H 2 O)] n ( 2 ) and {[Pb(H 2 L 2 )] n ( 3 ) (H 4 L = 1,1′-(propane-1,3-diyl)bis(1H-imidazole-4,5-dicarboxylic acid)) have been successfully prepared under hydrothermal conditions. Complexes 1 and 2 are isomorphic and exhibit 2D fes network constructed from interconnected ring-like [M 2 (H 2 L) 2 ] (M = Zn or Cd) MBBs. Complex 3 displays a 3D covalent framework with seh-3 , 5-P2 1 /c net topology built by interconnected ring-like [Pb 4 (H 2 L) 2 ] MBBs. Moreover, the thermal stability and fluorescent properties of these complexes were investigated in detail.