Synthesis, Crystal Structure and Characterization of Zn(II) Complex Constructed from 2,2'-Bisbenzimidazole

Abstract

The design and synthesis of novel coordination polymers have received remarkable attention not only due to their intriguing variety of structures and topologies, but also to their potential applications in many fields such as ion exchange, catalysis and for the development of optical, electronic and magnetic devices 1-4. However, it is still a challenge to construct coordination polymer, which may be affected by many factors, such as metal ions, organic ligands, metal-to-ligand ratios, reaction temperature, solvents, and counter ions 5-7. Among these factors, metal ions and organic ligands play crucial roles in synthesizing new coordination polymer. So various multicarboxylate ligands have been used to produce coordination polymer, due to their versatile bridge modes and excellent coordination capacities. As a rigid and versatile bridging ligand, 5-hydroxyisophthalic acid has been extensively studied for designing new coordination polymer because its two carboxylic groups can bond with metal centers and the hydroxyl group, an electron-with drawing group coexisting in isophthalic acid, can not only act as a hydrogen bond acceptor, can but also take on some spatial effects 8,9. On the other hand, benzimidazole derivatives contain multiple nitrogen-donor sites with the possibility of reversible protonation and deprotonation properties and can be coordinated to a transition metal in