Coordination polymers constructed by linking metal ions with azodibenzoate anions

Abstract

Twelve new coordination polymers have been obtained using three different azodibenzoate ligands, 3,3′'-azodibenzoic acid (3,3′'-ADB), 3,3′'-azoxydibenzoic acid (3,3′'-AODB) and 4,4′'-azodibenzoic acid (4,4′'-ADB) in combination with a variety of metal ions and co-ligands. Their crystal structures have been elucidated using single crystal X-ray diffraction analysis and the thermal stabilities of some of the products have been investigated using thermogravimetric analysis. The compounds, [Pb(3,3′'-ADB)(phen)] n (1), [Cu2(3,3′'-AODB) (PPh3)2]n (2), [Zn(4,4′'-ADB)(Py) 2]n (3), [Cd(4,4′'-ADB)(H2O) 2]n (4), and [Co(4,4′'-ADB)(Py)2(H 2O)2]n (5), form 1-D chains. Compounds Zn(3,3′'-ADB)(CH3CH2OH) (6..