Synthesis, crystal structure and highly sensitive detection property of a fluorescent copper coordination polymer

A new luminescent metal-organic framework [Cu(Hbcb)(PYTPY)] (1) (H(3)bcb=3,5-bis((5'-carboxylbenzyl)oxy)benzoic acid, PYTPY= 4'-(4-pyridyl)-2,2':6',2 ''-terpyridine) has been successfully synthesized and structurally characterized by elemental analysis, IR and single crystal X-ray diffraction. Analysis revealed that an infinite one-dimensional ladder chain was created by offset face-to-face pi-pi stacking interactions between H(3)bcb and PYTPY. And it exhibits a three-dimensional supramolecular structure through the pi-pi stacking interactions between chains. The thermal stabilities and gas adsorption properties of complex 1 was studied. The experimental results show that complex 1 has good thermal stabilities and selective adsorption properties for CO2. The solid-state luminescent properties of MOFs have been measured carefully by ultraviolet irradiation at room temperature. Most noteworthy, complex 1 exhibits a high sensitivity for Fe3+ and nitrobenzene in ethanol solution with mixed metal ions and aromatic compounds, which makes it be a promising crystalline material as luminescent probe to Fe3+ and nitrobenzene. Importantly, complex 1 can keep its original framework and be reused in sensing experiments. The sensing mechanism has also been studied in detail. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

A new luminescent metal-organic framework [Cu(Hbcb)(PYTPY)] has been successfully synthesized and characterized, showing good thermal stability and selective adsorption properties for CO2. It exhibits high sensitivity for Fe3+ and nitrobenzene, making it a promising material for sensing applications. The complex can maintain its framework and be reused in experiments, with a detailed understanding of the sensing mechanism.