An Unusual Interweaving in a 3-Fold Interpenetrated Pillared-Layer Zn(II) Coordination Polymer with a Long Spacer Ligand

This communication describes a unique interweaving of a pyridyl-based long linear spacer ligand, 1,4-bis[2-(4-pyridyl)ethenyl]benzene (bpeb), in the triply interpenetrated pillar-layer porous coordination polymer [Zn 2 (ndc) 2 (bpeb)]·DMF·3H 2 O(where ndc = 2,6-naphthalenedicarboxylate) containing a paddle-wheel secondary building unit (SBU) with α-Po topology. When the dicarboxylate is changed diethylpyrocarbonate (DEPC) fromndc to biphenyl-4,4′-dicarboxylate (bpdc), the reaction furnished a completely different 3-fold interpenetrating three-dimensional coordination polymer [Zn 3 (bpdc) 3 (bpeb)]·0.5DMSO·1.5H 2 O having a uninodal eight connected network structure with hexagonal bipyramidal SBUs.