A novel turn-on type fluorescent probe with a large red-shift based on TPE for detection of F−

A tetraphenylethylene derivative with AIE properties was successfully synthesized, displayed a large Stokes shift (Δλ = 123 nm) in THF. TBIP could also be used as a turn-on fluorescent probe for fluoride ion recognition, with a large red-shift (101 nm), rapid response, and excellent selectivity. The limit of detection (LOD) was calculated and derived as 0.006 μM in solvent, which was far lower than the maximum pollutant level of fluorine ion in drinking water, and fluorescence color changing from blue-purple to yellow. The application research indicated that the sensor could detect F− in natural water sensitively, and could prepare qualitative test strips for fluorine ion detection.