Journal
DYES AND PIGMENTS
Volume 98, Issue 2, Pages 286-289Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2013.03.002
Keywords
Fluorescent chemodosimeter; Rhodamine-6G derivative; Hg2+; Desulfurization reaction; Biological imaging; Fluorescence enhancement
Funding
- National Natural Science Foundation of China [21172127, 21072110, 21205065]
- Natural Science Foundation of Shandong province [ZR2011BM010]
- CAS Key Laboratory of Molecular Recognition and Function [2009LMRF004]
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An easily available novel fluorescent chemodosimeter based on thiorhodamine 6G-amide has been synthesized and displayed highly selective and sensitive Hg2+-amplified fluorescence emission and absorbance above 500 nm in aqueous solution with a broad pH range 6-10. The mechanism for the high selectivity of the probe to Hg2+ has never been reported, which is the Hg2+-induced desulfurization reaction and spirolactam opening of rhodamine. This sensor was applied for biological imaging to confirm that it can be used as a fluorescent probe for monitoring Hg2+ in living cells with satisfying results, which further demonstrates its value of practical applications in environmental and biological systems. (C) 2013 Elsevier Ltd. All rights reserved.
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