Facile synthesis of tetraphenylpyrazine-based AIE molecules with distinguishable fluorescence for aging latent fingerprint visualization

In this study, a lipophilic aggregation-induced emission (AIE)-active tetraphenylpyrazine (TPP)-derived compound (TPP-APBP-P) was designed and synthesized. It was found that the compound retains stable detection capability even after prolonged exposure to high-temperature environments (for up to 9 hours) or when applied to the detection of aged fingerprints (up to one month old). The successful synthesis of this material is of great significance for advancing immersion-based fluorescent fingerprint detection technology.