Selective Fe2+Ion Recognition Using a Fluorescent Pyridinyl-benzoimidazole-derived Ionophore

Jeong Ah Lee, Geun Hee Eom, Hyun Min Park, Ju Hoon Lee, Hyesun Song, Chang Seop Hong, Sungho Yoon, Cheal Kim
2012 Bulletin of the Korean Chemical Society (Print)  
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
more » ... 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. Key Words : Fluorescent chemical sensor, 6-Br-ppmbi, Fe 2+ cation Figure 4 . Digital image of the fluorescence response of 6-Brppmbi upon addition of the cations in aqueous solution excited at 364 nm using UV lamp. Left to right: Ca 2+ , Co 2+ , Cu 2+ , Fe 2+ , Hg 2+ , K + , Mg 2+ , Na + , Ni 2+ , Zn 2+ ions.
doi:10.5012/bkcs.2012.33.11.3625 fatcat:ukryvfux7ndjxlqww7nmbavese