Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 402, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2020.112814
Keywords
Phenazine derivative; Heavy metal ion; Fluorescence detection; Self-assembly; Sensor
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Funding
- National Natural Science Foundation of China (NSFC) [21574104, 21662031, 21661028]
- Natural Science Foundation of Gansu Province [1506RJZA273]
- Natural Science Foundation of Northwest Normal Universtiy [NWNU-LKQN-18-24]
- Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China [IRT15R56]
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In this work, we designed and synthesized a chromene-functionalized imidazophenazine-based fluorescent sensor (PS) which can detect mercury ions and silver ion in aqueous solution by different fluorescence behavior. When Hg2+ was added to the solution of PS, the fluorescent color of PS changed from yellow to green, and the emission peak was shifted from 543 nm to 511 nm. Upon the addition of Ag+, the fluorescence of PS was quenched. The detection limits of the PS for Hg2+ and Ag+ were calculated as 1.2 x 10(-7) M and 3.6 x 10(-8) M, respectively. In addition, the Ag+-coordinated non-fluorescent complex (PS-Ag+) could be used as new chemosensor for selective fluorescent turn-on detection of Hg2+ through competitive coordination in aqueous solution with a detection limit of 1.5 x 10(-8) M.
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