Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Selective Fe2+ Ion Recognition Using a Fluorescent Pyridinyl-benzoimidazole-derived Ionophore

  • Lee, Jeong Ah (Department of Fine Chemistry, Seoul National University of Science & Technology) ;
  • Eom, Geun Hee (Department of Fine Chemistry, Seoul National University of Science & Technology) ;
  • Park, Hyun Min (Department of Fine Chemistry, Seoul National University of Science & Technology) ;
  • Lee, Ju Hoon (Department of Fine Chemistry, Seoul National University of Science & Technology) ;
  • Song, Hyesun (Department of Bio & Nano Chemistry, Kookmin University) ;
  • Hong, Chang Seop (Department of Chemistry, Korea University) ;
  • Yoon, Sungho (Department of Bio & Nano Chemistry, Kookmin University) ;
  • Kim, Cheal (Department of Fine Chemistry, Seoul National University of Science & Technology)
  • Received : 2012.04.13
  • Accepted : 2012.08.08
  • Published : 2012.11.20
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Abstract

Fluorescent organic molecules that respond to changes in the $Fe^{2+}$ concentration with selectivity to other abundant di-valent metal ions will offer the ability to understand the dynamic fluctuations of the $Fe^{2+}$ ion in interesting media. The use of 6-Br-ppmbi, derived from 2-pyridin-2-yl-benzimidazole, for metal ion-selective fluorescence recognition was investigated. Screening of the main group and transition metal ions showed exclusive selectivity for $Fe^{2+}$ ions even in the presence of competing metal ions. In addition, the requirement for low concentrations of probe molecules to detect certain amounts of $Fe^{2+}$ ions make this sensor unique compared to previously reported $Fe^{2+}$ ion sensors.

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