title: Highly specific and reversible fluoride sensor based on an organic semiconductor.
abstract: A novel sulfonamide-conjugated benzo-[2,1-b:3,4-b']bithiophene semiconductor has been designed and synthetized in order to develop a probe for specific detection of anions both in the homogeneous (solution) and heterogeneous phase. Its photophysical and electrochemical data were reported in this study. On the basis of the optical and NMR titrations analysis, the chelator was found to be highly selective for fluoride compared to others anions (Ka = 1.6 × 10(4) M(-1) in dimethyl sulfoxide (DMSO)). In addition, from an intricate sample, the novel chelator shows exceptional specificity toward fluoride and reveals a complete reversibility after addition of trifluoroacetic acid (TFA). Sensing films were obtained by electrochemical polymerization of the probe on an electrode surface, which clearly show effective detection of fluoride.
authors.affiliation: Centre Interdisciplinaire de Nanoscience de Marseille (CINaM-UMR CNRS 7325), Aix-Marseille Université , 163 Ave de Luminy Case 913, 13288 Marseille Cedex 09, France.
authors.forename: Hecham
authors.initials: H
authors.lastname: Aboubakr
authors.forename: Hugues
authors.initials: H
authors.lastname: Brisset
authors.forename: Olivier
authors.initials: O
authors.lastname: Siri
authors.forename: Jean-Manuel
authors.initials: JM
authors.lastname: Raimundo
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D004563:Electrochemistry; D005459:Fluorides / Q000032:analysis* / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D012666:Semiconductors; D013449:Sulfonamides / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry*
chemical_list: D013449:Sulfonamides; D013876:Thiophenes; D005459:Fluorides; D004121:Dimethyl Sulfoxide