芴酮传感器的制备及超灵敏检测有机溶剂中痕量水

Development of fluorenone sensor and its application in ultrasensitive detection of trace water in organic solutions

通过一步Suzuki-Miyaura偶联反应,制备了一种具有聚集诱导发光(AIE)性质的芴酮类荧光传感器2,7-二苯基芴酮(DHP)。在干燥有机溶剂中DHP展现出黄绿色荧光;而在含水有机溶液中,DHP的羰基官能团与水分子发生氢键相互作用,引发电荷转移,降低DHP的荧光。基于此,可实现对有机溶剂中痕量水的检测。DHP用于检测常规溶剂四氢呋喃和1,4-二氧六环中痕量水时,荧光信号强度(I)与水含量(f_(w))呈线性关系,线性方程分别为I=5.566f_(w)+0.919和I=5.125f_(w)+0.997,相关系数(R^(2))分别为0.9982和0.9994,检出限低至0.0025%和0.0027%。同时制备的基于DHP的荧光试纸条可以方便快捷的实现对有机溶剂中痕量水的检测。

A fluorenone fluorescence sensor named 2,7-diphenyl-9H-fluoren-9-one(DHP)with aggregationinduced emission(AIE)behavior was prepared by a simple Suzuki-Miyaura coupling reaction.In dry organic solvents,DHP sensor showed yellow-green fluorescence,while in organic solutions containing water,the carbonyl functional group of DHP interacted with water molecules through hydrogen bond,causing charge transfer,and leading to the reduce of the fluorescence of DHP.Based on the above,the detection of trace water in organic solvents could be realized.When DHP was used in detecting trace water in conventional solvents of tetrahydrofuran and 1,4-dioxane,there were linear relationships between the photoluminescence intensities(I)of DHP and the contents of water(f_(w)),the calibration curve equations were I=5.566f.+0.919 and I=5.125f_(w)+0.997,with the correlation coefficients(R^(2))of 0.9982 and 0.9994,respectively.The limits of detection were as low as 0.0025%and 0.0027%,respectively.Meanwhile,the fluorescence strip based on DHP sensor can be used to detect trace water in organic solvents conveniently and quickly.