4.6 Article

A FRET-based fluorescent and colorimetric probe for the specific detection of picric acid

Journal

RSC ADVANCES
Volume 8, Issue 55, Pages 31658-31665

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ra05468a

Keywords

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Funding

  1. Natural Science Foundation of China [21663032]
  2. Natural Science Foundation of Shaanxi Province [2018JQ2079, 2018JQ2040]
  3. Scientific Research Program - Shaanxi Provincial Education Department [17JK0869, 15JS121]
  4. Yan'an Science & Technology Innovation Team [2015CHTD-04]
  5. Startup Foundation for Docotors and Youth Science Foundation of Yan'an University [YDBK2015-06, YDBY2016-001, YDQ2017-14]
  6. National Undergraduate Training Programs for Innovation and Entrepreneurship [201710719005]

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Picric acid (PA) as an environmental pollutant and high explosive, has recently received considerable attention. In this paper, a novel fluorescent and colorimetric chemo-probe (L) for the highly selective and sensitive detection of picric acid has been revealed. The probe was facilely constructed using rhodamine B, ethylenediamine and 4-(9H-carbazol-9-yl)benzoyl chloride. Significant fluorescence changes based on an intramolecular fluorescence resonance energy transfer (FRET) effect followed by a distinct color change from colorless to pink were observed after addition of picric acid to the probe solution. Selectivity measurements revealed that the as-synthesized probe exhibited high selectivity toward PA in the presence or absence of other analytes. The experimental titration results suggested that the as-synthesized probe is an effective tool for detection of PA with a nanomolar scale detection limit (820 nM) and could also serve as a naked-eye indicator for PA detection.

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