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A Reusable Eu 3+ Complex for Naked‐Eye Discrimination of Methanol from Ethanol with a Ratiometric Fluorimetric Equilibrium in Methanol/Ethanol Mixtures
Ist Teil von
European journal of inorganic chemistry, 2019-11, Vol.2019 (44), p.4727-4734
Erscheinungsjahr
2019
Quelle
Wiley Online Library All Journals
Beschreibungen/Notizen
Immediate naked eye distinction of methanol from ethanol can be performed by simple dissolution, in each of these solvents, of either [Na][EuFOD
4
] (
1
) complex or in mixture of products from the reaction between [P
6,6,6,14
][Eu(FOD)
4
] and NaOPhMe
3
, referred as
2
, ([P
6,6,6,14
]
+
= 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 Eu
3+
luminescence in the visible region due to the interaction of the [P
6,6,6,14
][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.