Metal-dependent dimensionality in coordination polymers of a semi-rigid dicarboxylate ligand with additional amide groups: Syntheses, structures and luminescent properties

Three new coordination polymers, [CdL(H2O)3·H2O]n (1), [MnL(H2O)2]n (2) and [ZnL]n (3) (L = 2,2′-[1,4-bis(-benzamido)]diacetate) have been hydrothermally synthesized. Complex 1 and complex 2 are 1-D infinite zigzag chain and 2-D rectangular grid networks, respectively, in which are further stabilized by hydrogen bonds, thus affording two 3-D supramolecular frameworks. Complex 3 exhibits a (4, 4)-connected PtS topology. Moreover, an unusual phenomenon has been observed that the dimension of these coordination polymers gradually increases with the decrease of coordination numbers of metal ions. In addition, complex 1 exhibits a strong blue luminescence in the solid state at room temperature and may be potential candidate for luminescent materials.

Graphical abstractThree different dimensional transition metal polymers with a semi-rigid ligand have been hydrothermally synthesized and structural characterized, in which unusually, the dimension of these coordination polymers gradually increases with the decrease of coordination number of metal center.Figure optionsDownload full-size imageDownload as PowerPoint slide