Vertical Interpenetration of 1D Water Column and 1D Coordination Polymer Chain

Hydrothermal reaction of 1-amino-1-phenylmethane-1,1-diphosphonic acid (APhMDPH₄), ZnO and 2,2′-bipyridyl (2,2-bipy) affords a novel zinc phosphonate compound, i.e. Zn₃(L₁H)₂(2,2′-bipy)₃ · 18H₂O (1), in which the phosphonate ligand, L₁H₄, is generated via an in situ concentration reaction. This compound is a one-dimensional (1D) zigzag coordination polymer chain and a huge, complex 1D water column. The 1D water column and the 1D coordination polymer chain are joined together to form a vertical interpenetrating network, which is reported for the first time.