Abstract

Divalent copper coordination polymers containing aliphatic dicarboxylate and bis(3-pyridylmethyl)piperazine (3-bpmp) tethering ligands exhibit different topologies depending on the length of the polymethylene chain and stoichiometric ratio. {[Cu(succinate)(3-bpmp)]·8H 2O} n ( 1) and {[Cu(adipate)(3-bpmp)(H 2O)]·10H 2O} n ( 4) both display (4,4) rhomboid grids, although the latter shows significant undulations to accommodate the additional girth of the dicarboxylate tethers. [Cu 2(succinate) 2(3-bpmp) 0.5(H 2O)] n ( 2) and [Cu 2(glutarate) 2(3-bpmp)] n ( 3) possess {Cu 2(OCO) 3} partial paddlewheel and {Cu 2(OCO) 4} complete paddlewheel carboxylate bridged dimeric units, respectively. However, 2 has a (6,3) brick-layered structure with a rare binodal moganite ( mog) supramolecular topology, while 3 possesses a non-interpenetrated primitive cubic network. Intriguing co-crystallized water tapes are seen in 1 and 4. Thermal dehydration and decomposition behavior of 1– 4 is also presented.

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