Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 400, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2020.112719
Keywords
3,5-dichlorosalicylaldehyde; Half-salamo-based compound; Fluorescent chemosensors; Pb2+ ion; Cys
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Funding
- National Natural Science Foundation of China [21761018]
- Program for Excellent Team of Scientific Research in Lanzhou Jiaotong University [201706]
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A half-salamo-based fluorescent chemosensor HL based on 3,5-dichlorosalicylaldehyde was developed. Sensor HL showed a single selectivity for heavy metal Pb2+ ion by on-turn fluorescence in various common metal ions. After forming a 2 : 1 type complex with Pb2+ ion, the minimum detection limit (LOD) of HL for Pb2+ ion was calculated as 5.65 x 10(-8) M. In addition, the complex formed by HL and Pb2+ ion was used as a new chemosensor L-Pb2+ for further recognition of cysteine (Cys), thereby releasing HL. The minimum detection limit (LOD) of Cys for L- Pb2+ was calculated as 3.80 x 10(-7) M. The on-off-on mode of chemosensors HL and L- Pb2+ achieved by alternately adding Pb2+ and Cys has reached the recycling of chemosensors.
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