Synthesis And Characterization Of Coordination Polymers Based On Novel Bisbenzimidazole Ligands

Coordination polymers?CPs?play an important role in chemistry and material science due to their diverse topological frameworks and widely applications in photocatalysis and fluorescence sensors.The N-donor and carboxylate ligand system are the representative selection for constructing CPs.In which,the fully deprotonated/partially deprotonated carboxylic groups can be coordinated with the metal centers using a variety of coordination modes.The flexible bis?benzimidazole?ligands as the typical N-donor ligands can bend or rotate when coordinating to metal centers and consequently generate more robust and intricate networks.Ten new Zn/Cd-based CPs were synthesized by 1,3-bis?benzimidazol-1-yl?-2-propanol?L1?,1,3-bis?5,6-dimethylbenzimidazol-1-yl?-2-propanol?L2?and 1,3-bis?2-methylbenzimidazol-1-yl?-2-propanol?L3?and different kinds of carboxylate ligands.The thermogravimetric,photocatalytic,and luminescence sensing properties were also investigated.1 exhibits a 4-connected 3D hxg/P framework.2 is 2D hcb network.3 forms a 1D chain.4 has a three-fold interpenetrated sqc6 framework.5 possesses a 2D?4,4?-connected 4,4L10 topology.6 displays a 3D?3,5?-connected 3,5T1 framework.7 possesses a 2D sql layer.8 forms a 1D chain.9 forms a 1D chain.10 could be simplified a 3D?3,4?-connected sqc2210 network.The ten coordination polymers have high thermal stabilities.7 shows the highest degradation efficiency for MB compared with other nine complexes.1 can be used as a probe to detect acetone.2 and 6 can be used as sensors to detect Cr₂O₇^2– ions.6 can also be used to detect Fe³⁺ in aqueous solution.Figure 82;Table 10;Reference 70...