Tetraphenylethylene fluorophore-based AIE-fluorescent ionogels

Aggregation-induced emission (AIE) systems face challenges in low-visibility environments, particularly for monitoring applications at night, due to optical and electrical signal feedback limitations. To address this issue, we developed fluorescent ionogels (TPPE-IL) by incorporating TPPE into an ionic liquid matrix. This innovative combination enhances the performance of wearable electronic devices through improved ionic conductivity, softness, and transparency. TPPE-IL exhibits significantly higher fluorescence intensity than hydrogel systems, making it more effective for nighttime monitoring. It demonstrates exceptional fluorescence stability during continuous stretch-release cycles (1000 s) and robust adhesive properties. Additionally, it exhibits excellent environmental stability and dehydration resistance. The sensitivity of TPPE-IL as a sensing material is 1.85, making it suitable for high-performance deformation sensors. Notably, the strain sensor based on TPPE-IL enables real-time monitoring of human and giant salamander movements at night, providing high sensitivity and reliable signal response. This study highlights the potential of TPPE ionogels in wearable electronics and ecological monitoring, offering a significant reference for developing new fluorescent ionogels.