Nanoporous lanthanide-copper(II) coordination polymers:: Syntheses and crystal structures of [{M2(Cu3(iminodiacetate)6)}•8H2O]n (M = La, Nd, Eu)

Water shortage: The structures of the three-dimensional coordination polymers [{M2(Cu3(iminodiacetate)6)} ·8H2O]n (M = La (1), Nd (2), and Eu (3)) contain water molecules that are located within channels throughout the lattice structure (see picture). Investigation of their thermal stability shows that the frameworks remained intact when the guest water molecules were removed. Rehydration of the La and Eu species leads to polymers with only five lattice water molecules per polymer unit, which corresponds to a change in the bonding characteristics of the water molecules.