A porous, two-dimensional copper coordination-polymer containing guest molecules: hydrothermal synthesis, structure, and thermal property of [Cu(BDC)(bipy)](BDCH2) (BDC=1,4-benzenedicarboxylate; bipy=4,4′-bipyridine)

The hydrothermal reaction of Cu(NO3)2·2.5H2O with 1,4-benzenedicarboxylic acid (BDCH2) and 4,4′-bipyridine (bipy) gave a two-dimensional copper(II) coordination polymer with an empirical of formula of [Cu(BDC)(bipy)](BDCH2) (1). Polymer 1 contains free BDCH2 molecules as guests in channels constructed by Cu, BDC2−, and bipy. The BDCH2 guest molecules are involved in intermolecular hydrogen bonds of the type O–H⋯O, which seem to be main forces to hold the guests in the channels. X-ray powder diffraction (XRPD) studies suggest that polymer 1 and its guest-free form have the same framework. Polymer 1 was structurally characterized by X-ray diffraction.