Novel colorimetric anion sensors based on N-acetylglyoxylic amides containing nitrophenyl signalling units
摘要:
N-acetylglyoxylic amides 4 and 5 bearing pendant 4-nitrophenyl and 2,4-dinitrophenyl groups respectively were synthesized and evaluated as anion sensors. A crystal structure of 4 was obtained by X-ray crystallography. Compounds 4 and 5 behaved as calorimetric sensors for CN- and F-, and exhibited naked eye-detectable color changes upon the addition of these anions. The chromogenic properties of 4 and 5 were assessed by UV-Vis and H-1 NMR spectroscopy. (C) 2013 Elsevier B.V. All rights reserved.