Abstract
A new rhodamine-based fluorescent chemosensor (1) has been designed and synthesized by linking rhodamine 6G hydrazide with N-methylisatin via an imine linkage. The receptor can selectively recognize and sense Pb2+, Hg2+ and Cd2+ by showing different fluorescence characteristics. In ethanol/HEPES buffer medium, the addition of Cd2+ caused a yellowish-green fluorescence, while the presence of Pb2+ or Hg2+ gave rise to an orange fluorescence. Additionally, the sensor shows an irreversible fluorescence response to Pb2+ and reversible fluorescence responses to Hg2+ and Cd2+.
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This work is supported by the National Natural Science Foundation of China (21162010), the Natural Science Foundation of Hainan Province (No. 20162028) and Program for Innovative Research Team in University (IRT-16R19).
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Su, W., Yuan, S. & Wang, E. A Rhodamine-Based Fluorescent Chemosensor for the Detection of Pb2+, Hg2+ and Cd2+ . J Fluoresc 27, 1871–1875 (2017). https://doi.org/10.1007/s10895-017-2124-0
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DOI: https://doi.org/10.1007/s10895-017-2124-0