A colorless neutral receptor with no particular chromogenic substituents selectively recognizes fluoride ions with a concomitant development of a yellow color (see scheme). The receptor contains two equivalent arms, each equipped with a thiourea fragment. Color originates from the extended π delocalization induced by the strong hydrogen-bonding interaction of the F− ion with the internal NH groups of thiourea moieties.
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Titolo: | A Colorimetric Approach to Anion Sensing: A Selective Chemosensor of Fluoride Ions, in which Color is Generated by Anion-Enhanced π Delocalization |
Autori: | |
Data di pubblicazione: | 2004 |
Rivista: | |
Abstract: | A colorless neutral receptor with no particular chromogenic substituents selectively recognizes fluoride ions with a concomitant development of a yellow color (see scheme). The receptor contains two equivalent arms, each equipped with a thiourea fragment. Color originates from the extended π delocalization induced by the strong hydrogen-bonding interaction of the F− ion with the internal NH groups of thiourea moieties. |
Handle: | http://hdl.handle.net/11571/21238 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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