Hydrogen-bonding assemblies constructed from metalloligand building blocks and H2O

By using a metalloligand building unit, novel hydrogen-bonding assemblies, [Fe(H2O)6][Cu(2,4-pydca)2] (1) and [Cu(2,4-pydca)(imidazole)2] · 2H2O (2) (2,4-pydca = 2,4-pyridinedicarboxylate), were prepared and characterized by X-ray crystallography. These compounds have metalloligand dimer units, [Cu2(2,4-pydca)4]4− and [Cu2(2,4-pydca)2(imidazole)4], each of which assembles by π-π (1) and hydrogen-bonding (2) interactions to form 1-D metalloligand arrays. The 1-D metalloligand arrays are linked by rich hydrogen-bonding interactions via H2O molecules, forming 3-D networks.