1. Two Zn(II) complexes based on bis(benzimidazole) and different dicarboxylate anions: synthesis, structures, and fluorescent properties.
- Author
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Wu, Zhengwei, Gao, Wei, Zhang, Jiaqi, Lv, Yue, Fei, Cailing, and Wu, Huilu
- Abstract
AbstractTwo new zinc(II) complexes, [Zn2(PBM)2(terephthalate)(formate)2] (
1 ) and {[Zn(PBM)(fumarate)]∙H2O}n (2 ), were synthesized using 1,3-bis(1H-benzo[d]imidazol-2-yl)propane (PBM) and two different dicarboxylic acids under solvothermal conditions. Complexes1 and2 have been characterized by infrared spectroscopy, elemental analysis, and single-crystal X-ray diffraction analysis. The structural analysis showed that1 was a binuclear structure and then formed a 3D supramolecular network structure through hydrogen bond and π-π conjugation, while2 was a one-dimensional coordination polymer. In1 and2 , the zinc ions were four-coordinate with an N2O2 donor set and a slightly distorted tetrahedral geometry. The solid-state fluorescence properties indicate that the fluorescence peaks belong to the π*-π transition of the ligand PBM, which has a significant red shift and enhancement with the order being1 >2 >1 results in a stronger fluorescence of1 than2 . Therefore, coordination and π∙∙∙π conjugation will affect the fluorescence of complexes. [ABSTRACT FROM AUTHOR]- Published
- 2024
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