A Reusable Eu3+ Complex for Naked-Eye Discrimination of Methanol from Ethanol with a Ratiometric Fluorimetric Equilibrium in Methanol/Ethanol Mixtures
authors Leal, JP; Paz, FAA; Mendes, RF; Moreira, T; Outis, M; Laia, CAT; Monteiro, B; Pereira, CCL
nationality International
journal EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
author keywords Sensors; Europium; Fluorescence; Methanol; Ethanol; Ionic liquids
keywords DIRECT-INJECTION; IONIC LIQUID; QUANTIFICATION; BEVERAGES; ALCOHOL
abstract Immediate naked eye distinction of methanol from ethanol can be performed by simple dissolution, in each of these solvents, of either [Na][EuFOD4] (1) complex or in mixture of products from the reaction between [P-6,P-6,P-6,P-14][Eu(FOD)(4)] and NaOPhMe3, referred as 2, ([P-6,P-6,P-6,P-14](+) = trihexyltetradecylphosphonium cation, FOD- = 1,1,1,2,2,3,3-heptafluoro-7,7-dimethyloctane-4,6-dionate). Additionally, an easy, low-cost, efficient and fast spectrofluorimetric method for the detection and quantification of methanol in mixtures with ethanol is described. This method is based on the changes in the Eu3+ luminescence in the visible region due to the interaction of the [P-6,P-6,P-6,P-14][Eu(FOD)(4)] complex with these alcohols. A limit of detection as low as 15 % (w/w) of methanol in mixtures of ethanol/methanol is discussed considering a linear calibration curve.
publisher WILEY-V C H VERLAG GMBH
issn 1434-1948
year published 2019
volume 2019
issue 44
beginning page 4727
ending page 4734
digital object identifier (doi) 10.1002/ejic.201900843
web of science category Chemistry, Inorganic & Nuclear
subject category Chemistry
unique article identifier WOS:000497228700001
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journal impact factor 2.507
5 year journal impact factor 2.381
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