title: A highly selective fluorescent probe for pyrophosphate detection in aqueous solutions.
abstract: A novel and simple fluorescence enhancement method is introduced for selective pyrophosphate (PPi) sensing in an aqueous solution. The method is based on a 1:1 metal complex formation between tris(8-hydroxyquinoline-5-sulphonate) thulium(III) [Tm(QS)(3)] and PPi ion. The linear response covers a concentration range of 1.6 × 10(-7) -1.0 × 10(-5)  mol/L PPi and the detection limit is 2.3 × 10(-8)  mol/L. The association constant of Tm(QS)(3) -PPi complex was calculated as 2.6 × 10(5)  mol/L. Tm(QS)(3) shows a selective and sensitive fluorescence enhancement toward PPi ion in comparison with I(3)(-), NO(3)(-), CN(-), CO(3)(2-), Br(-), Cl(-), F(-), H(2) PO(4) (-) and SO(4)(2-), which is attributed to higher stability of the inorganic complex between pyrophosphate ion and Tm(QS)(3).
authors: Centre of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Iran.
authors: M R
authors: MR
authors: Ganjali
authors: M
authors: M
authors: Hosseini
authors: F
authors: F
authors: Aboufazeli
authors: F
authors: F
authors: Faridbod
authors: H
authors: H
authors: Goldooz
authors: A R
authors: AR
authors: Badiei
mesh_terms: D011756:Diphosphates / Q000032:analysis*; D005456:Fluorescent Dyes; D057230:Limit of Detection; D015336:Molecular Probe Techniques
chemical_list: D011756:Diphosphates; D005456:Fluorescent Dyes; C107241:diphosphoric acid