New microporous coordination polymer affording guest-coordination sites at channel wallsElectronic supplementary information (ESI) available: Fig. S1: XRPD patterns of (a) simulation, (b) 2 and (c) 3. See http://www.rsc.org/suppdata/cc/b1/b108695b/

Utilization of a metalloligand, (Cu(2,4-pydca)2(H2O).2Et3NH) (1) (2,4-pydca = pyridine-2,4-dicarboxylate), as a building unit provides a novel porous coordination polymer, (ZnCu(2,4-pydca)2(H2O)3(DMF).DMF)n (2), in which the Zn(II) ion at the node of the network acts as a linker and the Cu(II) ion in the channel wall is available for guest-coordination.