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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
Author(s) -
Leal João P.,
Paz Filipe A. Almeida,
Mendes Ricardo F.,
Moreira Tiago,
Outis Mani,
Laia César A. T.,
Monteiro Bernardo,
Pereira Cláudia C. L.
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201900843
Subject(s) - chemistry , methanol , naked eye , ethanol , detection limit , dissolution , fluorescence , luminescence , calibration curve , analytical chemistry (journal) , inorganic chemistry , chromatography , organic chemistry , physics , optoelectronics , quantum mechanics
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.