Journal
SCIENCE CHINA-CHEMISTRY
Volume 57, Issue 7, Pages 1043-1047Publisher
SCIENCE PRESS
DOI: 10.1007/s11426-014-5107-x
Keywords
turn-on; gold ion fluorescent probe; low detection limit; good selectivity and sensitivity; bioimaging application
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Funding
- National Natural Science Foundation of China [21222605, 21006009, 21136002, 21376039]
- Fundamental Research Funds for the Central Universities of China
- Program for New Century Excellent Talents in University
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education
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A new fluorescent probe RY was synthesized for the detection of Au3+ ions based on a rhodamine B derivative. The fluorescent probe showed good selectivity and sensitivity to Au3+ ions. Obvious color and fluorescence changes could be observed with the naked eye while the fluorescent probe reacted with the Au3+ ions. The detection limit of the probe was determined to be 36 ppb by the fluorescence titration; the excellent linear relationship suggests that the probe is potentially useful for quantitative detection of Au3+ in vitro. We also demonstrated its bioimaging application in both living cells and mice; this was the first time that a fluorescent probe was successfully applied to imaging Au3+ in living animals.
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