A novel Hg2+ selective ratiometric fluorescent chemodosimeter based on an intramolecular FRET mechanism.
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 0.0-10.0x10(-6) and 5x10(-8) M, respectively.
Shang
Gui-Qin
GQ
Key Laboratory of Analytical Sciences, Ministry of Education, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.
Gao
Xia
X
Chen
Mei-Xiu
MX
Zheng
Hong
H
Xu
Jin-Gou
JG
D015374:Biosensing Techniques / Q000379:methods*; D019793:Fluorescein / Q000737:chemistry; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008628:Mercury / Q000032:analysis*; D015394:Molecular Structure; D012235:Rhodamines / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000379:methods*; D014867:Water / Q000737:chemistry
D005456:Fluorescent Dyes; D012235:Rhodamines; D014867:Water; D008628:Mercury; C029773:rhodamine B; D019793:Fluorescein