{[Cu(biPY)2.5(H2O)](ClO4)2•(H2O)• (CH3OH)1.5}n(bipy=4,4′-bipyridine):: organic template effect in formation of a novel bilayer coordination polymer with large chiral channels

In the presence of the organic template molecule, 4-amino-3,5-bis(4-pyridyl)-1,2,4-triazole, a unique acentric coordination polymer based on linear 4,4'-bipyridine (bipy) bridging ligand, {[Cu(bipY)(2.5)(H2O)](ClO4)(2) . (H2O) . (CH3OH)(1.5)}(n) (1), was obtained by the reaction of Cu(II) perchlorate with bipy in H2O/CH3OH medium. The bidendate bipy molecules bridge the Cu-11 centers to form a 2-D bilayer framework with an 8(2).10 topology, and the monodendate bipy ligands, locating up and down each 2-D architecture, are involved in significant aromatic stacking interactions with the adjacent 2-D motifs, resulting in a 3-D porous network with large square channels for including the guest solvents and anions. (C) 2004 Elsevier B.V. All rights reserved.