Three-dimensional network constructed with novel one-dimensional Z-shaped chains via intricate noncovalent interactions

Novel coordination polymers {[M(bpmb)(H2O)2(C2H5OH)2]·(NO3)2}n (M=Zn 1, Cd 2; bpmb= N,N′-bis (3-pyridinylmethyl)-1,4-benzenedicarboxamide) have been synthesized by the reaction of bpmb with zinc(II) salt and cadmium(II) salt in ethanol–water solution, respectively. Elemental analysis, IR spectra and X-ray crystal structure analysis were carried out to determine the compositions and crystal structures of the two compounds, which reveal that bpmb bridges the metal centers to from a one-dimensional chain. These chains were linked through noncovalent interactions to form three-dimensional networks.