Li Dongmei, Zhong Zhimin, Zheng Gengxiu, Tian Zhongzhen
Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, No. 336, West Road of Nan Xinzhuang, Jinan 250022, China.
Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, No. 336, West Road of Nan Xinzhuang, Jinan 250022, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2017 Oct 5;185:173-178. doi: 10.1016/j.saa.2017.05.053. Epub 2017 May 24.
A novel naphthalene benzimidazole (NBI)-based chemosensor (D2) was developed for fluoride ion (F) detection. The absorption spectrum of D2 changed dramatically from yellow to blue in the visible region accompanied with a 225nm red shift of its absorption maximum upon the addition of F in DMSO. D2 also exhibited a fluorescence turn-off response towards the fluoride ion. The emission intensity of D2 decreased drastically along the increasing F concentration and the detection limit for F was as low as 3.2×10mol/L. H NMR and HRMS-ESI results indicated that the formation of NBI-O through the desilylation reaction of F with NBI-OSi was responsible for the spectral changes. Overall, this kind of NBI-type molecules represent a new type chemosensor for the spectral detection of fluoride ion in solution.
开发了一种基于新型萘并苯并咪唑（NBI）的化学传感器（D2）用于氟离子（F⁻）检测。在二甲基亚砜（DMSO）中加入F⁻后，D2的吸收光谱在可见光区域从黄色急剧变为蓝色，其最大吸收波长发生了225nm的红移。D2对氟离子还表现出荧光猝灭响应。随着F⁻浓度的增加，D2的发射强度急剧下降，F⁻的检测限低至3.2×10⁻⁸mol/L。¹H NMR和HRMS-ESI结果表明，F⁻与NBI-OSi通过去硅烷化反应形成NBI-O是光谱变化的原因。总体而言，这种NBI型分子代表了一种用于溶液中氟离子光谱检测的新型化学传感器。
