Abstract
When one or more nitro groups are incorporated into an anion receptor, intramolecular proton transfer from nearby –NH groups often takes place and is a significant obstacle for the construction of supramolecular systems. In this paper, by employing an intramolecular hydrogen bond between –NH and nitro groups in order to reduce the acidity of the amide group, we were able to construct a receptor that formed stable supramolecular systems. The receptor forms a 1:2 supramolecular compound with fluoride, whereas 1:1 complexes were formed with AcO− and H2PO4 − in DMSO solution. Using this system, an easy-to-prepare test paper for the detection of F− in low concentration at (10−4 M) in water was developed.
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Acknowledgments
This project was supported by the National Natural Science Foundation of China (No. 20371028; 20671052).
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Yu, X., Lin, H. & Lin, H. A colorimetric anion receptor containing the cis-Ru(bipy)2 2+ group. Transition Met Chem 33, 829–834 (2008). https://doi.org/10.1007/s11243-008-9118-3
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DOI: https://doi.org/10.1007/s11243-008-9118-3