In recent years, aggregation-induced emission luminogens (AIEgens) have witnessed numerous groundbreaking advances in fundamental theoretical research and functional applications. Notably, stimuli-responsive AIEgens have achieved remarkable results, demonstrating immense potential for application in various fields such as chemistry, materials science, biology, and medicine. Herein, two multi-stimuli-responsive cyanostilbene derivatives TPE-CNTPA and PH-CNTPA were synthesized by introducing tetraphenylethylene (TPE) and trifluoromethyl groups, respectively. Primarily, under the combined mechanism of aggregation-induced emission (AIE) and twisted intramolecular charge transfer (TICT), TPE-CNTPA and PH-CNTPA exhibit “on-off-on” fluorescent emission characteristics in solution. Secondly, under 365 nm ultraviolet light irradiation, the photo-induced isomerization of PH-CNTPA causes changes in photophysical property, demonstrating its responsiveness to ultraviolet light. In addition, TPE-CNTPA and PH-CNTPA exhibit high-contrast mechanochromic properties, providing broader possibilities for their potential applications in various fields. Moreover, owing to the unique fluorescence emission characteristics, TPE-CNTPA and PH-CNTP have enormous potential for application in the field of encryption anti-counterfeiting. Besides, PH-CNTPA can be utilized for the detection of trace water in single or mixed solvents, demonstrating outstanding sensitivity and anti-interference properties in different solvents. This research work reveals the potential in the fields of water sensing and anti-counterfeiting for these two multi-stimuli-responsive compounds.

中文翻译：

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多重刺激响应的氰基二苯乙烯衍生物：其荧光和力致变色特性及其在水传感和防伪方面的潜在应用


近年来，聚集诱导发光发光体（AIEgens）在基础理论研究和功能应用方面取得了许多突破性进展。值得注意的是，刺激响应型AIEgens已经取得了显着的成果，展示了在化学、材料科学、生物学和医学等各个领域的巨大应用潜力。在此，通过引入四苯乙烯（TPE）和三氟甲基，分别合成了两种多刺激响应的氰基芪衍生物TPE-CNTPA和PH-CNTPA。首先，在聚集诱导发射（AIE）和扭曲分子内电荷转移（TICT）的联合机制下，TPE-CNTPA和PH-CNTPA在溶液中表现出“开-关-开”荧光发射特性。其次，在365 nm紫外光照射下，PH-CNTPA的光致异构化引起光物理性质的变化，表明其对紫外光的响应性。此外，TPE-CNTPA和PH-CNTPA表现出高对比度的力致变色特性，为其在各个领域的潜在应用提供了更广泛的可能性。而且，由于独特的荧光发射特性，TPE-CNTPA和PH-CNTP在加密防伪领域具有巨大的应用潜力。此外，PH-CNTPA可用于单一或混合溶剂中痕量水的检测，在不同溶剂中表现出出色的灵敏度和抗干扰性能。这项研究工作揭示了这两种多刺激响应化合物在水传感和防伪领域的潜力。