title: A novel ratiometric sensor for the fast detection of palladium species with large red-shift and high resolution both in aqueous solution and solid state.
abstract: A highly selective fluorescent probe (OHBT) was designed and synthesized by linking the ESIPT fluorophore N-(3-(benzo[d]thiazol-2-yl)-4-(hydroxyphenyl) benzamide) (HBTBC) to the palladium specificity response group, allyl group, for the detection of palladium species in aqueous solution. The allyl group can be hydrolyzed by Pd(0) species through the Pd(0)-catalyzed Tsuji-Trost reaction and thus release the fluorophore HBTBC, which shows two emission bands. The maximum emission spectra originated from the enol and keto forms at 415 and 555 nm respectively and with no overlap, which implies the high resolution of the palladium detection. The palladium species can also be detected by paper strip because of the solid-state fluorescence of probe HOBT catalyzed by palladium. This method was successfully applied in the palladium related Suzuki-Miyaura coupling reaction and the detection limit is lower than 1 μM.
authors.affiliation: State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of Chemical Biology, East China University of Science and Technology, Shanghai, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Cui
authors.forename: Weiping
authors.initials: W
authors.lastname: Zhu
authors.forename: Yufang
authors.initials: Y
authors.lastname: Xu
authors.forename: Xuhong
authors.initials: X
authors.lastname: Qian
mesh_terms: D015374:Biosensing Techniques / Q000379:methods* / Q000592:standards; D005456:Fluorescent Dyes / Q000032:analysis*; D010165:Palladium / Q000032:analysis*; D012996:Solutions; D013050:Spectrometry, Fluorescence / Q000379:methods / Q000592:standards; D013997:Time Factors; D014867:Water / Q000032:analysis*
chemical_list: D005456:Fluorescent Dyes; D012996:Solutions; D014867:Water; D010165:Palladium