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A novel Hg2+-selective fluorescent chemprobe based on thiooxorhodamine-B and β-C-glycoside
1School of Chemical Engineering, Nanjing University of Science & Technology, 200 Xiaolingwei St, Nanjing, JiangSu 210 094, PR China.
Abstract:
In this paper, two novel easily available probes based on rhodamine B and β-C-glycoside were synthesized and characterized by 1H NMR, 13C NMR and elemental analysis. Sensor 1 exhibited very high sensitivity and selectivity toward Hg2+ over other metal ions, due to the opening of the spiro ring in thiooxorhodamine B caused by Hg2+ through desulfurization. The binding analysis using Job's plot suggested 1:1 stoichiometry for the complexes formed for Hg2+. The fluorescent probe is pH independent in medium condition and common interferent ions do not show any interference with the Hg2+ determination. It is anticipated that 1 could be a good candidate probe and has potential application for Hg2+ determination.
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