Syntheses, crystal structures and luminescent properties of two new Zn(II) coordination polymers based on a dicarboxylate and different imidazole-containing ligands

To investigate the effect of different imidazole-containing ligands on the structure of coordination polymers, two new Zn(II) coordination polymers based on 1,4-cyclohexanedicarboxylic acid (H 2 cda) and two different imidazole-containing ligands, [Zn(cda)(bib) 0.5 ] n ( 1 ) and [Zn(cda)(bmib) 0.5 ] n ( 2 ) (bib = 1,4-bis(imidazol-1-yl)benzene and bmib = 1,4-bis(2-methylimidazol-3-ium-yl)benzene), have been synthesized and characterized by single-crystal X-ray diffraction.

Complex 1 shows a 3-D structure with point symbol (4.8 2 .10 3 ).(4.8 2 ). Complex 2 displays a 2-D layer structure with an –AB– stacking sequence.