Developing a portable device for visual and on-site detection of fluoride in groundwater is highly anticipated. In this paper, 2-(tert-butyl-diphenylsilanyloxy)-5-nitro-1H-benzoimidazole (1) has been rationally designed via a silanization reaction for self-calibration detection of fluoride, and the detection limit was calculated as 0.11 μM. The contact of 1 with fluoride would induce the cleavage of Si-O bond and trigger the emergence of excited state intramolecular proton transfer (ESIPT) process, and then the enol-like emission at 437 nm decreased accompanying with the increase of keto-like tautomerism emission at 550 nm. More importantly, considering the demand of field detection for fluoride in groundwater and combining the function of smartphone to obtain the chroma of photos. The chroma value of the fluorescence color changes from blue to yellow could be conveniently determined through a color recognizer application installed in smartphone. The device can accurately reflect the concentration of fluoride by analyzing the chroma value. The test in actual water samples confirmed that the simple device based on smartphone could be used efficiently for visual, on-site and accurate detection of fluoride in groundwater.

高度期望开发一种便携式设备，用于视觉和现场检测地下水中的氟化物。本文通过硅烷化反应合理设计了2-（叔丁基-二苯基甲硅烷基氧基）-5-硝基-1 H-苯并咪唑（1），用于氟的自校准检测，计算的检出限为0.11μM 。1的接触氟化物会引起Si-O键的断裂并激发激发态分子内质子转移（ESIPT）过程的出现，然后随着在550 nm处酮类互变异构体发射的增加，在437 nm处的烯醇类发射减少。 。更重要的是，考虑到现场检测地下水中氟化物的需求，并结合智能手机的功能以获得照片的色度。可以通过安装在智能手机中的颜色识别器应用程序方便地确定荧光颜色从蓝色变为黄色的色度值。该设备可以通过分析色度值来准确反映氟化物的浓度。在实际水样中进行的测试证实，基于智能手机的简单设备可以有效地用于视觉，