Abstract
The different interactions between a chemosensor, 1-(naphthalen-2-yl)-3-(6-nitrobenzothiazol-2-yl)-thiourea (1), and F−, acetate (AcO−), Cl−, and Br− anions have been investigated theoretically at the B3LYP/6-31+G(d,p) level with the basis set superposition error (BSSE) correction. It was found that the high selectivity of compound 1 for F− can be ascribed to the ability of the anion to deprotonate the N-H fragment of the host sensor, while the chemosensor also has a strong affinity for AcO− by virtue of the formation of a hydrogen-bonded complex. Intramolecular charge transfer (ICT) causes the colorimetric signaling of compound 1 after interaction with F−/AcO−. A study of substituent effects suggested that the O/NH- and O/S-substituted derivatives are also expected to be promising candidates for chromogenic F−/AcO− chemosensors.
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Jin, R., Sun, W. Theoretical study of thiourea derivatives as chemosensors for fluoride and acetate anions. Sci. China Chem. 55, 1428–1434 (2012). https://doi.org/10.1007/s11426-012-4660-4
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DOI: https://doi.org/10.1007/s11426-012-4660-4