title: Novel azo dye-based color chemosensors for fluoride ions.
abstract: Two novel fluoride (F(-)) sensors based on an azo dye (solvent yellow 4) were designed and synthesized. The chemosensors exhibited selectivity and high sensitivity towards F(-) over other anions such as Cl(-), Br(-), I(-), CH3COO(-), C6H5COO(-), and H2PO4(-), as noted by the naked eye and UV-vis spectral changes in DMSO/CH3CN (1:9, v/v). An obvious change in the color of the sensor solution from pale yellow to pink occurred after the addition of F(-), while the addition of other anions did not cause any change in color. These results imply that the two sensors are viable, portable chemosensors for the detection of F(-) ions in various biological and environmental fields.
authors.affiliation: Bio-energy Research Institute, Chonnam National University, Gwangju 500-757, Republic of Korea. Electronic address: choej47@gmail.com.
authors.forename: Eun Jin
authors.initials: EJ
authors.lastname: Cho
authors.affiliation: Gwangju Center, Korea Basic Science Institute, Gwangju 500-757, Republic of Korea.
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Lee
authors.affiliation: Bio-energy Research Institute, Chonnam National University, Gwangju 500-757, Republic of Korea; Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea.
authors.forename: Hyeun-Jong
authors.initials: HJ
authors.lastname: Bae
authors.affiliation: Gwangju Center, Korea Basic Science Institute, Gwangju 500-757, Republic of Korea. Electronic address: yjlee@kbsi.re.kr.
authors.forename: Young Ju
authors.initials: YJ
authors.lastname: Lee
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D015374:Biosensing Techniques / Q000379:methods*; D003124:Colorimetry; D004396:Coloring Agents / Q000737:chemistry*; D005461:Fluorine / Q000032:analysis*; D009682:Magnetic Resonance Spectroscopy; D013056:Spectrophotometry, Ultraviolet
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D005461:Fluorine
keywords: Azo dye; Chemosensor; Color change; Fluoride sensor; Naked eye