Five new coordination polymers, namely, [Ni 2 (L) 2 (4,4Јbipy) 3 )]·H 2 O] n (1), [Ni 2 (L) 2 (O) (bpp) 2 ] n (2), [Zn(L)(bib) 0.5 ] n (3), [Zn(L)(PyBIm)] n (4), and [Zn 3 (L) 2 (OH)(im)] n (5) [H 2 L = benzophenone-2,4Ј-dicarboxylic acid, 4,4Ј-bipy = 4,4Ј-bipyridine, bpp = 1,3bis(4-pyridyl)propane, PyBIm = 2-(4-pyridyl)benzimidazole, and im = imidazole] were synthesized under hydrothermal conditions. Structure determination revealed that compound 1 is a 3D network and exhibits a 4-connected metal-organic framework with (4 2 .6 3 .8) topology, whereas 1512 compounds 2, 3, 4, and 5 are two-dimensional layer structures. In compounds 2-4, dinuclear metal clusters are formed through carboxylic groups. In compound 5, trinuclear metal clusters are formed through μ 3 -OH and carboxylic groups. The carboxylic groups exhibit three coordination modes in compounds 1-5: monodentately, bidentate-chelating, and bis-monodentately. Furthermore, the luminescent properties for compounds 3, 4, and 5 were investigated.[Zn(L)(bib) 0.5
] n (3)Single-crystal X-ray reveals that complex 3 crystallizes in the triclinic space group P1. In the asymmetry unit, exists an independent Zn II ion, which is coordinated by four oxygen