The development of sensitive, cheap, and portable methods for detecting nitroaromatics explosives has a profound significance and value for public health and environmental protection. For this purpose, a new D-π-A barbituric acid derivative CB-CYH with aggregation-induced emission (AIE) behavior was synthesized, which can interact with picric acid through photoinduced electron transfer (PET). Scanning electron microscopy (SEM) and dynamic light scattering (DLS) indicate that the enhanced emission of the compounds is related to the formation of nano-aggregates. It is well known that an important source of mechanochromic fluorescence (MCF) characteristic materials is the compound with AIE characteristics. The chemosensing test paper prepared by aggregated nanoparticles based on AIE properties is often subjected to external friction or squeeze during transportation or storage, resulting in changes of their optical properties, and destruction of test paper followed. Therefore, the development of compounds with AIE properties and stable optical properties in the presence of external stimuli is particularly important for chemosensing test paper. Molecular dynamics simulation (MDS) shows that the presence of hydrophobic cycloalkyl group in CB-CYH, which caused the molecules to be closely interspersed with each other; hence, it is difficult to change the microstructure and stacking mode of molecules by external stimulation simultaneously; the optical properties are not changed by external stimuli. Therefore, the test paper based on the AIE effect of CB-CYH was developed as chemosensing test paper for the detection of nitroaromatics.

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基于巴比妥酸衍生物纳米粒子聚集的化学传感试纸

灵敏，廉价，便携式的硝基芳香族爆炸物检测方法的发展对公共卫生和环境保护具有深远的意义和价值。为此，新的D- π-合成了具有聚集诱导发射（AIE）行为的巴比妥酸衍生物CB-CYH，其可以通过光致电子转移（PET）与苦味酸相互作用。扫描电子显微镜（SEM）和动态光散射（DLS）表明，化合物发射的增强与纳米聚集体的形成有关。众所周知，机械致变色荧光（MCF）特征材料的重要来源是具有AIE特征的化合物。由聚集的基于AIE特性的纳米粒子制备的化学传感试纸经常在运输或存储过程中受到外摩擦或挤压，从而导致其光学性能发生变化，从而破坏试纸。因此，在化学刺激的情况下，在有外部刺激的情况下开发具有AIE特性和稳定光学特性的化合物特别重要。分子动力学模拟（MDS）表明，CB-CYH中存在疏水性环烷基，这导致分子彼此紧密地散布。因此，难以通过外部刺激同时改变分子的微观结构和堆积方式。光学特性不会因外部刺激而改变。因此，开发了基于CB-CYH的AIE效应的试纸作为用于检测硝基芳香族化合物的化学传感试纸。这导致分子彼此紧密地散布；因此，难以通过外部刺激同时改变分子的微观结构和堆积方式。光学特性不会因外部刺激而改变。因此，开发了基于CB-CYH的AIE效应的试纸作为用于检测硝基芳香族化合物的化学传感试纸。这导致分子彼此紧密地散布；因此，难以通过外部刺激同时改变分子的微观结构和堆积方式。光学特性不会因外部刺激而改变。因此，开发了基于CB-CYH的AIE效应的试纸作为用于检测硝基芳香族化合物的化学传感试纸。