A FRET-based fluorescent and colorimetric probe for the specific detection of picric acid |
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| Authors: | Ensheng Zhang Ping Ju Pu Guo Xiufang Hou Xueyan Hou Haiming Lv Ji-jiang Wang Yuqi Zhang |
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| Institution: | Laboratory of New Energy & New Function Materials, Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan''an University, Yan''an Shaanxi 716000 P. R. China.; College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu Shandong 273165 P. R. China |
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| Abstract: | 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.A FRET-based fluorescent and colorimetric chemo-sensor has been designed and synthesized for the selective and sensitive detection of picric acid. |
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