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Rational design of a FRET-based ratiometric fluorescent probe with large Pseudo-Stokes shift for detecting Hg2+ in living cells based on rhodamine and anthracene fluorophores.
- Source :
-
Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy . Aug2022, Vol. 276, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
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Abstract
- A new probe based on anthracene-xanthene dyes for detecting Hg2+ was designed and the detailed mechanism was researched systematically. [Display omitted] • A colorimetric and fluorometric probe 1 based on anthracene and xanthene was synthesized. • 1 having highly selective recognition of Hg2+ by FRET mechanism. • The detection mechanism had been verified by NMR, ESI-MS, and HPLC spectra. • The probe can detect Hg2+ in living cells. The development of fluorescent dyes has been a continuing attractive research topic in the field of fluorescence sensing and bioimaging technologies, most of them were subject to a single signal change. In this work, a novel colorimetric and ratiometric fluorescent probe 1 based on rhodamine and anthracene groups was designed and synthesized via the fluorescence resonance energy transfer (FRET) mechanism. Probe 1 showed excellent selectivity, higher sensitivity and ratiometric response to Hg2+ in the CH 3 CN/H 2 O (1/1, v/v) system, with a fast response time (less than 30 s); The fluorescent color changed from purple to orange and the solution visible to the naked-eye changed from colorless to pink. The Pseudo-Stokes shift was 174 nm upon addition of Hg2+. The limit of detection (LOD) was calculated to be 0.81 μM and 0.38 μM according to fluorescence and UV/vis measurements, respectively. Furthermore, a possible mechanism for the detection of Hg2+ by probe 1 was verified by using 1H NMR, ESI-MS, and HPLC spectra. Meanwhile, probe 1 was successfully used for cell imaging for the detection of Hg2+ in living cells. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13861425
- Volume :
- 276
- Database :
- Academic Search Index
- Journal :
- Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy
- Publication Type :
- Academic Journal
- Accession number :
- 156552640
- Full Text :
- https://doi.org/10.1016/j.saa.2022.121242