Anion-Controlled Copper(II) Coordination Polymers Based on Angular Dipyridyl Ligand

mer An increasing interest has been directed toward the study of new metal-organic frameworks due to potential appli-cations. 1-4 In this case, the particular product formed depends on a delicate balance between alternative confor-mations of the organic ligands and on the nature of the metals and anions as well as solvent molecules employed. Topologically, an angular bidentate ligand can form a dis-crete dimer, a 1D chain, and an infinite loop-chain, etc. 5 On the other hand, the use of longer ligands tends to lead the construction of frameworks with interpenetrating structure, which hinders the formation of the useful void space. 6-8 In our efforts to investigate the factors for the control of the self-assembly of such frameworks, dipyridyl-based ligands separated by a phenyl amide spacer N,N'-bis(4-pyridylcarbonyl)-4,4'-diaminodiphenyl ether (L) has attract-ed our attention in connection with the coordination affinity and structural control of discrete or divergent coordination networks upon metal complexation under appropriate conditions. 9,10 Li et al