4.4 Article

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

Journal

JOURNAL OF FLUORESCENCE
Volume 18, Issue 6, Pages 1187-1192

Publisher

SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10895-008-0365-7

Keywords

Fluorescence; Chemosensor; Ratiometric; FRET; Hg2+

Funding

  1. Science Research Foundation of Xiamen University [E43011]
  2. National Natural Science Foundation of China [20675067]

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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 x 10(-6) and 5x10(-8) M, respectively.

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