Journal
TETRAHEDRON
Volume 75, Issue 9, Pages 1223-1230Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2019.01.029
Keywords
Rhodamine B; Fe(III) ions; Fluorescent chemosensors; Cell imaging
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Funding
- NSF China [81371616]
- Key Project of Jiangsu Province for Fundamental Research and Development [BE2018717]
- Six Talent Peak Award [2015SWYY013]
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A novel turn-on rhodamine B-based fluorescent chemosensor (RBCS) was designed and synthesized by reacting N-(rhodamine B)lactam-1,2-ethylenediamine and carbon disulfide. Upon addition of Fe3+ in EtOH/H2O solution (2:1, v/v, HEPES buffer, 0.6 mM, pH 7.20), the RBCS displayed a significant fluorescence enhancement at 582 nm and a dramatic color change from colorless to pink, which can be detected by the naked eye. Significantly, the RBCS exhibited a highly selective and sensitive ability toward Fe3+. The detection limit of the probe was 2.05 x 10(-7) M. Job's plot indicated the formation of 1:1 complex between the RBCS and Fe3+. Moreover, the practical use of the RBCS is demonstrated by its application in the detection of Fe3+ in HeLa cells. (C) 2019 Elsevier Ltd. All rights reserved.
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