{[Cu(bipy) 2.5(H 2O)](ClO 4) 2 · (H 2O) · (CH 3OH) 1.5} n (bipy = 4,4′-bipyridine): organic template effect in formation of a novel bilayer coordination polymer with large chiral channels

Abstract

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(H 2O)](ClO 4) 2 · (H 2O) · (CH 3OH) 1.5} n ( 1), was obtained by the reaction of Cu(II) perchlorate with bipy in H 2O/CH 3OH medium. The bidendate bipy molecules bridge the Cu II 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.