Background: Multifunctional fluorescent probes have attracted much attention due to their wide range of applications and high utilization. In this study, a multifunctional fluorescent probe (E)-3-(4-(7-(4-(diphenylamino)phenyl)benzo[c] [1,2,5]thiadiazol-4-yl)phenyl)acrylic acid (TBAC) based on triphenylamine was designed and synthesized.

Results: The TBAC probe provided excellent aggregation-induced emission (AIE) performance and could be used as a fluorescent ink for printing. It was also prepared successfully for application as a fingerprint powder, facilitating the visual detection of invisible fingerprints on surfaces such as glass, plastic, tinfoil, metal, aluminum, and resin. The probe exhibited a clear fluorescence response to 12 volatile amines via an AIE-based 'on-off' mechanism in an EtOH/HO (4/6, v/v) solution. The TBAC/bromocresol green (BCG) indicator label also enabled non-destructive and rapid assessment of salmon freshness through dual-channel colorimetric and fluorescence responses.

Conclusion: The versatility of TBAC makes it a promising material for various applications, including fluorescent materials, criminal detection, and food safety. This study provides a new basis for the multifunctional application of fluorescent probes. © 2025 Society of Chemical Industry.

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Source
http://dx.doi.org/10.1002/jsfa.14144DOI Listing

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