Journal
TETRAHEDRON LETTERS
Volume 56, Issue 29, Pages 4293-4298Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2015.05.045
Keywords
Ratiometric sensing; FRET; ICT; Hg2+; Fluorescence probe
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Funding
- Qinghai Science & Technology Department of China [2011-H-808]
- National Natural Science Foundation of China [21362027]
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Rhodamine B and phenothiazine building blocks have been used to synthesize a novel ratiometric fluorescent probe I for Hg2+. Based on fluorescence resonance energy transfer (FRET) and internal charge transfer (ICT) mechanisms, a low detection limit for Hg2+ of 1.8 ppb has been achieved. The intensity ratio (F580 nm/F520 nm) of fluorescent probe 1 increased on going from 0.1 to 1.0 equiv of Hg2+. In the FRET process, energy is transferred from the phenothiazine moiety to the rhodamine B moiety. Probe 1 shows a selective response to Hg2+ by color and fluorescence changes. (c) 2015 Elsevier Ltd. All rights reserved.
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