A novel chromophore reaction-based pyrrolopyrrole aza-BODIPY fluorescent probe for H2S detection and its application in food spoilage

A portable smartphone platform utilizing dual-sensing signals for visual determination of semicarbazide in food samples

“…[33][34][35] Chromophore reaction-based fluorescent probes show distinct colorimetric and ratiometric fluorescent signals by drastic conjugation length changes of chromophores. 36,37 For instance, the core of BODIPY, pyrrolopyrrole aza-BODIPY (PPAB), and pyrrolopyrrole cyanine (PPCy) was susceptible to being attacked by nucleophiles such as a base, hydrazine, and organic amine. [38][39][40][41][42] Herein, by virtue of the nucleophilicity of the primary amine group in SEM, our findings indicated that PPCy-1 showed a sensitive response toward SEM through a chromophore reaction (Scheme 1C).…”