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- W2898804965 abstract "Two tweezer-like anion receptors 2,2′‑bis(2‑cyano‑2‑phenylvinyl)‑5,5′‑dimethyl dipyrromethane (1) and 2,2′‑bis[2‑cyano‑2‑(4‑nitrophenyl)vinyl]‑5,5′‑dimethyl dipyrromethane (2) were synthesized in good yields, via a facile condensation of diformyldipyrromethane and the appropriate phenylacetonitrile. Anion recognition properties of these receptors were studied in detail in DMSO solution, by means of UV–vis and 1H NMR titration techniques. The obtained results indicated that receptor 2 containing a terminal nitro group exhibited the strong and selective binding to biologically important fluoride and dihydrogenphosphate ions over other anions. In addition, the binding strength of receptor 2 with fluoride was enhanced by a factor of 18, relative to receptor 1 lacking the nitro group. Remarkably, the presence or absence of nitro group within receptor compounds also had a great influence on the anion-binding selectivity. In particular, a distinct color change of DMSO solution of receptor 2 was observed only upon addition of fluoride, showing the potential of 2 acting as an effective colorimetric sensor for the detection of fluoride anion." @default.
- W2898804965 created "2018-11-09" @default.
- W2898804965 creator A5053146953 @default.
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- W2898804965 date "2019-03-01" @default.
- W2898804965 modified "2023-10-06" @default.
- W2898804965 title "Synthesis, recognition and sensing properties of dipyrrolylmethane-based anion receptors" @default.
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- W2898804965 doi "https://doi.org/10.1016/j.saa.2018.10.056" @default.
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