Abstract
A new luminescent metal-organic framework [Cu(Hbcb)(PYTPY)] (1) (H3bcb=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 π-π stacking interactions between H3bcb and PYTPY. And it exhibits a three-dimensional supramolecular structure through the π-π 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.
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