Abstract
9-formyl-8-hydroxy-2,3,6,7-tetrahydro-1H, 5H-benzo[ij]-quinolizine rhodamine B hydrazone (FHQRH), a novel colorimetric chemosensor for Cu2+, was synthesized by a three-step synthetic route. It was found that FHQRH showed a high selectivity for Cu2+ ions and excellent anti-interference capability toward other metal ions. The FHQRH solution exhibited a visual color change after the addition of Cu2+, owing to the open spirocyclic structure via coordination with Cu2+. The complexation coefficient of FHQRH toward Cu2+ was measured to be 1:1. Furthermore, this Cu2+ chemosensor has a remarkable low detection limit of 0.45 μM, which is 2 % of the toxic level (20 μM) in drinking water as defined by the US Environment Protection Agency (EPA).
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Acknowledgments
This work was supported by Anhui Provincial Higher Educational Institutions Natural Science Foundation of China (KJ2011B168); the Natural Science Foundation of China (No. 21401065).
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Li, C., Xiang, K., Liu, Y. et al. A novel colorimetric chemosensor for Cu2+ with high selectivity and sensitivity based on Rhodamine B. Res Chem Intermed 41, 10169–10180 (2015). https://doi.org/10.1007/s11164-015-2024-3
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DOI: https://doi.org/10.1007/s11164-015-2024-3