Hydrogen-bonding organization of (4,4) coordination layers into a 3-D molecular architecture with channels clathrating guest molecules [Cu(tdc)(bpy)(H 2O)](bpy) (tdc=thiophine-2,5-dicarboxylate; bpy=4,4 ′-bipyridine)

Abstract

The hydrothermal reaction of Cu(OAc) 2 · H 2O with thiophene-2,5-dicarboxylic acid (H 2tdc) and 4,4 ′-bipyridine (bpy) gave a copper(II) coordination polymer {[Cu(tdc)(bpy)(H 2O)](bpy)} n ( 1), in which the (4,4) layers are assembled via strong hydrogen bonds between the aqua ligands and the uncoordinated carboxylate oxygen atoms into a porous 3-D molecular architecture with parallelogrammic channels. The guest bpy molecules reside in the channels, involving intermolecular C–H⋯N hydrogen bonds with the host framework, can be removed upon heating at reduced pressure.