Zhang Honghong, Li Fanghui, Yu Jiahong, Zhao Weijun
School of Chemistry and Molecular Engineering Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research Center Shanghai Key Laboratory of Functional Materials Chemistry Institute of Fine Chemicals Frontiers Science Center for Materiobiology and Dynamic Chemistry East China University of Science & Technology Shanghai China.
Smart Mol. 2024 Aug 27;3(1):e20240014. doi: 10.1002/smo.20240014. eCollection 2025 Mar.
Icing detection is critically important for preventing safety accidents and economic losses, especially concerning ice formation from invalidated anti-icing fluids (water and ethylene glycol) under extreme conditions. Traditional technologies like ultrasonics and capacitor-antenna face challenges with limited detection areas, lower accuracy, and susceptibility to electromagnetic interference. Here, we introduce a novel viscosity-ultrasensitive fluorescent probe 4',4‴-(2,2-diphenylethene-1,1-diyl) bis-(3,5-dicarboxylate) () based on AIEgens for monitoring ice formation of anti-icing fluids in low-temperature environments. , consisting of four sodium carboxylate groups and multiple freely rotating benzene rings, demonstrates outstanding solubility in anti-icing fluids and exhibits no fluorescent background signal even at low temperatures (<-20°C). Upon freezing, relocates from the water phase to higher viscosity ethylene glycol, causing restriction of benzene rings and a significantly increased green fluorescence signal. can successfully determine whether the anti-icing fluids are icing from -5 to -20°C with a high contrast ratio. Due to its simple setup, fast operation, and broad applicability, our new method is anticipated to be employed for rapid, real-time, and large-scale icing detection.
结冰检测对于预防安全事故和经济损失至关重要，特别是在极端条件下，由失效的防冰液（水和乙二醇）形成冰的情况。像超声波和电容天线这样的传统技术面临检测区域有限、精度较低以及易受电磁干扰等挑战。在此，我们基于聚集诱导发光（AIE）分子介绍一种新型的粘度超灵敏荧光探针4',4‴-(2,2-二苯乙烯-1,1-二基)双-(3,5-二羧酸盐)（），用于监测低温环境下防冰液的结冰情况。由四个羧酸钠基团和多个可自由旋转的苯环组成，在防冰液中表现出出色的溶解性，即使在低温（<-20°C）下也没有荧光背景信号。结冰时，从水相转移到粘度更高的乙二醇中，导致苯环受限，绿色荧光信号显著增强。可以在-5至-20°C范围内以高对比度成功确定防冰液是否结冰。由于其设置简单、操作快速且适用性广泛，我们的新方法有望用于快速、实时和大规模的结冰检测。
