A novel molecularly imprinted fluorescent sensor for the determination of 4-nitroaniline (4-NA) was synthesized via free radical polymerization with 3-[(7-methoxy-2-oxo-2H-chromen-4-yl)methyl]-1-vinyl-1H-imidazol-3-ium bromide as the fluorescence functional monomer, 4-NA as the template molecule, ethylene glycol dimethacrylate as the cross-linker, and 2,2′-azo(bisisobutyronitrile) as the initiator. The obtained fluorescent poly(ionic liquid) was characterized through Fourier transform infrared, scanning electron microscopy, Brunauer–Emmett–Teller analysis, and fluorescence spectrophotometry. The fluorescent sensor had high fluorescence intensity, short detection time (0.5 min), good selectivity, and excellent sensitivity (limit of detection = 0.8 nM) for 4-NA, with good linear relationships of 2.67–10,000 nM. The practical applicability of the fluorescence sensor in detecting 4-NA in industrial wastewater and spiked environmental water was demonstrated, and a satisfactory result was obtained.

Highly sensitive and selective detection of 4-nitroaniline in water by a novel fluorescent sensor based on molecularly imprinted poly(ionic liquid)

通过与3-[（7-甲氧基-2-oxo-2 H -chromen-4-yl）methyl] -1自由基聚合反应合成了一种新型的分子印迹荧光传感器，用于测定4-硝基苯胺（4-NA）-乙烯基-1 H其中，以-咪唑-3-溴化铵为荧光官能单体，以4-NA为模板分子，以乙二醇二甲基丙烯酸酯为交联剂，以2,2'-偶氮（双异丁腈）为引发剂。通过傅立叶变换红外光谱，扫描电子显微镜，Brunauer-Emmett-Teller分析和荧光分光光度法对所得荧光聚离子液体进行了表征。荧光传感器对4-NA的荧光强度高，检测时间短（0.5分钟），选择性好，灵敏度高（检测限= 0.8 nM），线性关系良好，为2.67–10,000 nM。证明了荧光传感器在工业废水和加标环境水中检测4-NA的实际适用性，并获得了令人满意的结果。

基于分子印迹聚离子液体的新型荧光传感器对水中4-硝基苯胺的高灵敏度和选择性检测