Zhao Meili, Deng Zhifu, Tang Jian, Zhou Xiufen, Chen Zhi, Li Xutian, Yang Liting, Ma Li-Jun
School of Chemistry and Environment, South China Normal University, Shipai, Guangzhou 510631, P. R. China.
Analyst. 2016 Apr 7;141(7):2308-12. doi: 10.1039/c5an02565f. Epub 2016 Feb 22.
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.
通过一步法合成了一种用于Fe(3+)的高选择性、高灵敏度的比率型“开启”荧光探针2-(1-芘基)苯并咪唑(L)。在发射光谱中，加入30当量的Fe(3+)后，L的准分子荧光与单体荧光的相对强度比(IE450/IM387)增加了510倍，在水溶液中的检测限为0.2 μM(11.2 ppb)。同时，L的荧光激发光谱显示其为Fe(3+)的“开启”型荧光探针，准分子激发带强度增强了30倍。
