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Two Rhodamine-based Turn on Chemosensors with High Sensitivity, Selectivity, and Naked-Eye Detection for Hg2+
Yan Zhou, Li-qiang Yan, Zhi-neng Kong, Wen-qi Du, Bao-ying Wu, Zheng-jian Qi
College of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
Abstract:
Two novel rhodamine-based fluorescence enhanced molecular probes (RA1 and RA2) were synthesized, which were both designed as comparative fluoroionophore and chromophore for the optical detection of Hg2+. The recognizing behaviors were investigated both experimentally and computationally. They exhibited high selectivity and sensitivity for Hg2+ over other commonly coexistent metal ions in CH3CN/H2O (1:1, V/V) solution. Test shows that hydroxy benzene of rich electron was beneficial to the chelate of Hg2+ with sensors. The detection limit was measured to be at least 0.14 μmol/L. After addition of Hg2+, the color changed from colourless to pink, which was easily detected by the naked eye in both solution and hydrogel sensor.
Key words:  Fluorescent sensor  Rhodamine  Mercury
FundProject:This work was supported by the Fundamental Research Funds for the Central Universities (KYLX15 0125) and National Major Scientific Instruments and Equipment Development Projects (2014YQ060773)
高灵敏,高选择和可视化识别Hg2+的罗丹明turn-on型化学传感器
周妍, 闫力强, 孔志能, 杜文琦, 吴宝赢, 祁争健
东南大学化学化工学院, 南京 211189
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DOI:10.1063/1674-0068/30/cjcp1608153
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