Novel chromogenic ligands for lithium and sodium based on calix[4]arene tetraesters
- 1 January 1992
- journal article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 18,p. 1287-1289
- https://doi.org/10.1039/c39920001287
Abstract
Two new chromogenic calix[4]arene tetraesters bearing nitrophenol residues display a striking cation-selective shift in absorbance maximum from the ultraviolet to the visible region in the presence of base upon addition of lithium ion or, to a lesser extent, sodium ion; the metal salt causes a change from colourless to yellow, the colour density being concentration dependent.Keywords
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