A novel ratiometric fluorescent Fe3+ sensor based on a phenanthroimidazole chromophore.
Phenanthroimidazole derivative 1 has been developed as a rare example of ratiometric fluorescent sensors for Fe(3+). Interestingly, upon treatment with Fe(3+), the sensor displayed a ratiometric fluorescent response with an enhancement of the ratios of emission intensities at 440 and 500 nm from 0.36 to 3.24. The detection range of the sensor for Fe(3+) is in the 1.0x10(-5)-1.5x10(-4) M concentration range and the detection limit is 5.26x10(-6) M. In addition, the sensor showed good selectivity to Fe(3+) with the selectivity coefficients (K(Fe3+) = S(Fe3+)/S(0) of Fe(3+) over other metal ions tested in the range of 5-68.
Lin
Weiying
W
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China. weiyinglin@hnu.cn
Long
Lingliang
L
Yuan
Lin
L
Cao
Zengmei
Z
Feng
Jianbo
J
D004566:Electrodes; D005456:Fluorescent Dyes / Q000737:chemistry*; D007093:Imidazoles / Q000737:chemistry*; D007501:Iron / Q000032:analysis*; D015394:Molecular Structure; D010616:Phenanthrenes / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000295:instrumentation* / Q000379:methods*
D005456:Fluorescent Dyes; D007093:Imidazoles; D010616:Phenanthrenes; D007501:Iron