The use of Differential Scanning Calorimetry (DSC) to characterize phase diagrams of ionic mixtures of 1-n-butyl-3-methylimidazolium chloride and niobium chloride or zinc chloride

The thermal behavior of the BMICl/NbCl 5 and BMICl/ZnCl 2 mixtures was investigated by DSC and correlated with previous studies using Raman spectroscopy. Combining both results, it was possible to built the phase diagram for these mixtures and suggest the formation of different compounds and the equ...

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Bibliographic Details
Published in:Thermochimica acta 2010-04, Vol.502 (1), p.20-23
Main Authors: Alves, Melquizedeque B., Umpierre, Alexandre P., Santos Jr, Vianney O., Soares, Valerio C.D., Dupont, Jairton, Rubim, Joel C., Suarez, Paulo A.Z.
Format: Article
Language:English
Subjects:
1-n-butyl-3-methylimidazolium
Chemistry
DSC
Exact sciences and technology
General and physical chemistry
Ionic liquids
Niobium pentachloride
Phase diagram
Phase equilibria
Zinc chloride
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Summary:The thermal behavior of the BMICl/NbCl 5 and BMICl/ZnCl 2 mixtures was investigated by DSC and correlated with previous studies using Raman spectroscopy. Combining both results, it was possible to built the phase diagram for these mixtures and suggest the formation of different compounds and the equilibria in the euthetic mixtures. The phase diagram of BMICl and NbCl 5 mixture showed that probably only one compound is formed at X NbCl5 = 0.50 (BMINbCl 6) and euthetic mixtures are present in the 0 ≤ X NbCl5 ≤ 0.50 composition range. For the BMICl and ZnCl 2, four different compounds were detected: (BMI) 2(ZnCl 4) for X ZnCl2 = 0.35; (BMI) 2(Zn 2Cl 6); (BMI) 2(Zn 3Cl 8) and (BMI) 2(Zn 4Cl 10) for X ZnCl2 = 0.70, and between these isoplets euthetic mixtures are formed.
ISSN:0040-6031
1872-762X
DOI:10.1016/j.tca.2010.01.023