期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
卷 448, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2023.115227
关键词
Coumarin; Fluorescent chemosensors; Cyanide anion; Colorimetric; Michael addition; Hydrazone
Novel chemosensors, including coumarin hydrazide, were synthesized and demonstrated the ability to detect cyanide ions through absorption and fluorescence turn-off response. The reaction mechanism between the sensors and the ions was determined through experimental and theoretical studies. The sensors exhibited high detection ability and effectiveness.
Novel chemosensors, including coumarin hydrazide, were designed and synthesized by a three-step synthesis sequence starting from 7-(diethylamino)-2-oxo-2H-chromene-3-carbohydrazide. General spectroscopic methods (FT-IR, 1H/13C NMR, and HRMS) were used to characterize all produced chemosensors. These chemosensors demonstrate the ability to detect cyanide (CN-) anion by shifting absorption and fluorescence turn-off response in DMSO. The reaction mechanism between the synthesized chemosensors and the CN- anion involves deproto-nation and addition processes; as determined by dipole-dipole interactions, reversibility, 1H NMR experiments, and theoretical studies. With limit of detection (LOD) values of 0.25 mu M and 0.15 mu M for 3a and 3b, respectively, these chemosensors exhibit exceptional detection ability and demonstrate the high effectiveness of their use for CN- anion determination.
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