A highly selective fluorescent probe for pyrophosphate detection in aqueous solutions |
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| Authors: | M R Ganjali M Hosseini F Aboufazeli F Faridbod H Goldooz A R Badiei |
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| Institution: | 1. Centre of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, , Iran;2. Department of Chemistry, Islamic Azad University, , Savadkooh, Iran;3. Endocrinology and Metabolism Research Centre, Tehran University of Medical Sciences, , Iran;4. School of Chemistry, University College of Science, University of Tehran, , Iran |
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| 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 × 105 mol/L. Tm(QS)3 shows a selective and sensitive fluorescence enhancement toward PPi ion in comparion with I3?, NO3?, CN?, CO32?, Br?, Cl?, F?, H2PO4? and SO42?, which is attributed to higher stability of the inorganic complex between pyrophosphate ion and Tm(QS)3. Copyright © 2011 John Wiley & Sons, Ltd. |
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| Keywords: | fluorescence enhancement sensor pyrophosphate Tm(QS)3 |
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