Ten Coordination Polymers Constructed Using an Unprecedented Azamacrocyclic Octacarboxylate Ligand 1,4,8,11-Tetrazacyclododecane‑N,N′,N″,N‴‑Tetra-Methylene-Isophthalic Acid: Syntheses, Structures, and Photoluminescent Properties

Ten new coordination complexes, [Cd3(H2L)­(H2O)7]­·6H2O (1), [Mn3(H2L)­(H2O)7]­·7H2O (2), [Zn3(H2L)­(H2O)6]­·6H2O (3), [Co3(H2L)­(H2O)6]­·5.75H2O (4), [Fe3(H2L)­(H2O)8]­·6.5H2O (5), [Co3(H2L)­(teta)3]­·5H2O (6), [Ni4(L)­(teta)4]­·2.5H2O (7), [Ni3(H2L)­(teta)­(H2O)6]­·6H2O (8), [Cd4(L)­(teta)4­(H2O)2]­·H2O (9), and [Cu2(H4L)­(teta)2]­·2H2O (10) (H8L = 1,4,8,11-tetrazacyclododecane-N,N′,N″,N‴-tetra-methylene-isophthalic acid and teta = 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane) have been synthesized. Their structures have been confirmed and further characterized by relative physical methods. Compounds 1 and 2 are isomorphous and demonstrate the identical three-dimensional (3D) (4,6)-connected nets with (64·72)­(68·76·8) topologies. Compounds 3–5 are isostructural and unfold 3D 4-fold interpenetrating frameworks with (412·63) topologies. Compound 6 is a 3D 2-fold interpenetrating framework with (412·63) topology. Compound 7 features a 3D 6-connected (412·63) net. Compounds 8 and 9 reveal two-dimensional (2D) layers, where hydrogen-bonding interactions further link adjacent layers together to obtain 3D supramolecular architectures. Compound 10 presents a one-dimensional ribbon. These ribbons are combined by π–π stackings to produce a 2D supramolecular layer. In addition, the fluorescent properties of H8L and compounds 1, 3, and 9 have been explored, and the luminescent sensing properties of compounds 1 and 3 for small molecules have been studied.