期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 213, 期 -, 页码 167-175出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2019.01.032
关键词
Fe3+; Naked eye; Binding ability; DFT calculation; Cell imaging
类别
资金
- National Natural Science Foundation of China [21502056]
- Natural Science Foundation of Guangdong Province, China [2016A030310463]
- Fundamental Research Funds for the Central Universities [2017MS079]
- Medical Scientific Research Foundation of Guangdong Province, China [A2018080]
Fe3+ ions play an important role in both biological and environmental field. In this work, two novel rhodamine-based colorimetric and fluorescent probes (RBA2 and RBA3) were designed and synthesized for the efficient detection of Fe3+. Upon the addition of Fe3+, the fluorescence intensity of RBA2 and RBA3 enhanced 108-fold and 222-fold, respectively. RBA2 and RBA3 exhibited a low detection limit which could achieve 12.8 nM and 11.0 nM. In addition, the binding modes of RBA2 and RBA3 with Fe3+ were proved to be 1:1 stoichiometry in the complexes by Job's plot, ESI-MS and H-1 NMR results. The complexing ability of RBA3 with Fe3+ excessed to that of RBA2 that was determined by the binding association constants, and highly consistent with DFT calculations results. Furthermore, RBA2 and RBA3 were further utilized to detect Fe3+ in living cells and real water samples, indicating their promising prospects in biological and environmental field. (C) 2019 Elsevier B.V. All rights reserved.
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