title: 2-(1-Pyrenyl) benzimidazole as a ratiometric and "turn-on" fluorescent probe for iron(III) ions in aqueous solution.
abstract: A highly selective and sensitive ratiometric and "turn-on" fluorescent probe for Fe(3+), 2-(1-pyrenyl) benzimidazole (L), was synthesized by a one-step process. In emission spectra, the relative intensity ratio of excimer to monomer fluorescence (IE450/IM387) of L increased 510-fold upon the addition of 30 equiv. of Fe(3+) with a detection limit of 0.2 μM (11.2 ppb) in aqueous solution. Meanwhile, the fluorescence excitation spectra of L showed a fluorescent "turn-on" probe for Fe(3+) with 30-fold enhancement in excitation band intensity of excimer.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Shipai, Guangzhou 510631, P. R. China. mlj898021@aliyun.com.
authors.forename: Meili
authors.initials: M
authors.lastname: Zhao
authors.forename: Zhifu
authors.initials: Z
authors.lastname: Deng
authors.forename: Jian
authors.initials: J
authors.lastname: Tang
authors.forename: Xiufen
authors.initials: X
authors.lastname: Zhou
authors.forename: Zhi
authors.initials: Z
authors.lastname: Chen
authors.forename: Xutian
authors.initials: X
authors.lastname: Li
authors.forename: Liting
authors.initials: L
authors.lastname: Yang
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Ma