title: A reversible and reusable selective chemosensor for fluoride detection using a phenolic OH-containing BODIPY dye by both colorimetric 'naked-eye' and fluorometric modes.
abstract: A novel BODIPY-based probe 1 was designed and synthesized as a selective fluorescent and colorimetric chemosensor for fluoride. The spectral responses of 1 to fluoride in acetonitrile were studied: an approximately 118 nm red shift in absorption and 'turn-off' emission response was observed. The striking pink to indigo change in ambient light was thought to be due to the deprotonation of the phenol moiety by way of O-H · · · F hydrogen bonding interactions. Interestingly, when the nonfluorescent 1-F(-) solution treated with trifluoroacetic acid (TFA) resulted in color change from indigo to pink and a significant enhancement of fluorescence intensity (10-fold). Furthermore, the reversibility and reusability of probe 1 for the detection of F(-) ion was tested for four cycles indicating the probe 1 could be used in reversible manner.
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, China, lingyun@scut.edu.cn.
authors.forename: Lingyun
authors.initials: L
authors.lastname: Wang
authors.forename: Guipo
authors.initials: G
authors.lastname: Fang
authors.forename: Derong
authors.initials: D
authors.lastname: Cao