Two Rhodamine-based Turn on Chemosensors with High Sensitivity,Selectivity, and Naked-Eye Detection for Hg2+ |
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| Authors: | Yan Zhou Li-qiang Yan Zhi-neng Kong Wen-qi Du Bao-ying Wu Zheng-jian Qi |
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| Affiliation: | College of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China |
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| 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. |
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| Keywords: | Fluorescent sensor Rhodamine Mercury |
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