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A Novel Hg2+ Selective Ratiometric Fluorescent Chemodosimeter Based on an Intramolecular FRET Mechanism

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Abstract

A irreversible Hg2+ selective ratiometric fluorescence probe FR, a fluorescein fluorophore linked to a rhodamine B hydrazide by a thiourea spacer, was designed and synthesized. The developed probe FR exhibited great ratiometric fluorescence enhancement and remarkable yellow-magenta color change toward Hg2+ with excellent selectivity in aqueous acetone solution, and the ratiometric fluorescence response to Hg2+ was not interfered by other metal cations including Fe3+, Co2+, Ni2+, Cr3+, Zn2+, Pb2+, Cd2+, Ca2+, Mg2+, Ba2+ and Mn2+. The linear range and the detection limit of this supposed ratiometric fluorescence method for Hg2+ were 0.0–10.0 × 10−6 and 5 × 10−8 M, respectively.

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Acknowledgment

This work was supported by the Science Research Foundation of Xiamen University (No.E43011) and the National Natural Science Foundation of China (No.20675067).

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Correspondence to Hong Zheng.

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Shang, GQ., Gao, X., Chen, MX. et al. A Novel Hg2+ Selective Ratiometric Fluorescent Chemodosimeter Based on an Intramolecular FRET Mechanism. J Fluoresc 18, 1187–1192 (2008). https://doi.org/10.1007/s10895-008-0365-7

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  • DOI: https://doi.org/10.1007/s10895-008-0365-7

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