Contraction of fluorescent compounds exhibiting strong luminescence and high photochemical stability for VOC sensing

Sensors, as core components of information technology, are crucial for data acquisition and are widely recognized for their technological significance and expansive market potential. Film-based fluorescence sensing stands out among various technologies for its exceptional sensitivity, selectivity, and adaptability, making it an ideal candidate for trace substance detection. This technology, particularly through the use of fluorescent units exhibiting twisted intramolecular charge transfer (TICT) properties, shows remarkable sensitivity to microenvironmental changes. However, TICT can also quench fluorescence, thereby diminishing the units' photostability. To address this, we employed theoretical models to integrate ring strain and steric hindrance, leading to the development of a new series of highly luminescent fluorescent derivatives. These derivatives demonstrate enhanced photostability and are capable of sensitively detecting gaseous substances, including triacetone triperoxide (TATP).