4.7 Article

A novel ratiometric fluorescent Fe3+ sensor based on a phenanthroimidazole chromophore

Journal

ANALYTICA CHIMICA ACTA
Volume 634, Issue 2, Pages 262-266

Publisher

ELSEVIER
DOI: 10.1016/j.aca.2008.12.049

Keywords

Fluorescent sensors; Fluorescence; Iron; Ratiometric; Phenanthroimidazole

Funding

  1. Key Project of Chinese Ministry of Education [108167]
  2. National Science Foundation of China [20872032]
  3. Scientific Research Foundation for the Returned Overseas Chinese Scholars
  4. State Education Ministry [2007-24]
  5. Hunan University research funds

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Phenanthroimidazole derivative 1 has been developed as a rare example of ratiometric fluorescent sensors for Fe3+. Interestingly, upon treatment with Fe3+, 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 Fe3+ is in the 1.0 x 10(-5)-1.5 x 10(-4) M concentration range and the detection limit is 5.26 x 10(-6) M. In addition, the sensor showed good selectivity to Fe3+ with the selectivity coefficients (KFe3+ = SFe3+/S-0) of Fe3+ over other metal ions tested in the range of 5-68. (C) 2009 Elsevier B.V. All rights reserved.

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