Synthesis, Crystal Structure and Photoluminescent Property of Cadmium(II) Metal-organic Framework with Mixed Carboxylate and Bis(imidazole) Ligand

The rational design and appropriate use of the characteristic ligands is critical in the construction of the desired MOFs. Among various organic ligands, multidentate N- or O-donor ligands such as pyridine or pyrazine-carboxylic acids, have drawn extensive attention in the construction of coordination polymers owing to their versatile coordination modes and structural stability.7 For example, pyridine-2,6-, 2,5-, or 3,4-dicarboxylic and pyra-zile-2,3-dicarboxylic acids have been employed as successful multifunctional ligands, and a variety of MOFs with diverse topologies and interesting properties have been obtained. However, compared with other pyridine-dicarboxylic acids, pyridine-2,3-dicarboxylic acid (H2PDA) is rarely employed as a linkage ligand