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(H2O)2]n (5), form 1-D chains. Compounds Zn(3,3′-ADB)(CH3CH2OH) (6) and Co3(3,3′-ADB)2(phen)2(CH3COO)2 (7) form 2D sheets which have the (4,4) topology. Two-dimensional sheets are also formed in the case of Cd(4,4′-ADB)(phen)(H2O) (8), Y2(3,3′-ADB)3(phen)2 (9), Sm2(3,3′-ADB)3(phen)2 (10) and Er2(3,3′-ADB)3(phen)2 (11) with 9, 10 and 11 being isomorphous. In the structure of Ba(4,4′-ADB) (12), Ba(II) carboxylate units form 2D sheets which are linked by organic links to form a 3D pillared structure.
