Abstract
A novel Zn6 metallamacrocycle based on a multidentate terpyridyl carboxylic acid ligand, namely [ZnL(HCOO)]6 (1), (HL = 4′-(4-carboxyphenyl)-2,2′:6′,2″-terpyridine), has been synthesized by the solvothermal method. Compound 1 was structurally characterized by elemental analysis, FT-IR, powder X-ray diffraction, thermogravimetric analysis and single-crystal X-ray diffraction. Compound 1 displays a hexanuclear Zn metallacycle structure, which extends into a honeycomb structure via π⋯π interactions. Compound 1 exhibits high selective sensing for the Fe3+ ion with great quenching efficiency and a low sensitive detection limit of 5.36 × 10−8 M. In addition, compound 1 is also a selective sensing material for the CCl4 molecule with a detection limit of 8.87 × 10−5 M. Furthermore, the luminescent sensing mechanisms for the Fe3+ ion and CCl4 molecule have been explored.
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