Liquid-liquid miscibility and volumetric properties of aqueous solutions of ionic liquids as a function of temperature


Autoria(s): Wang, Silu; Jacquemin, Johan; Husson, Pascale; Hardacre, Christpher; Costa Gomes, Margarita F.
Data(s)

01/11/2009

Resumo

The volumetric properties of seven {water + ionic liquid} binary mixtures have been studied as a function of temperature from (293 to 343) K. The phase behaviour of the systems was first investigated using a nephelometric method and excess molar volumes were calculated from densities measured using an Anton Paar densimeter and fitted using a Redlich-Kister type equation. Two ionic liquids fully miscible with water (1-butyl-3-methylimidazolium tetrafluoroborate ([CCIm][BF]) and 1-ethyl-3-methylimidazolium ethylsulfate ([CCIm][EtSO])) and five ionic liquids only partially miscible with water (1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([CCIm][NTf]), 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([CCIm][NTf]), 1-butyl-3-methylimidazolium hexafluorophosphate ([CCIm][PF]), 1-butyl-3-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([CCPyrro][NTf]), and butyltrimethylammonium bis(trifluoromethylsulfonyl)imide ([N][NTf])) were chosen. Small excess volumes (less than 0.5 cm · mol at 298 K) are obtained compared with the molar volumes of the pure components (less than 0.3% of the molar volume of the pure ionic liquid). For all the considered systems, except for {[CCIm][EtSO] + water}, positive excess molar volumes were calculated. Finally, an increase of the non-ideality character is observed for all the systems as temperature increases. © 2009 Elsevier Ltd. All rights reserved.

Formato

application/pdf

Identificador

http://pure.qub.ac.uk/portal/en/publications/liquidliquid-miscibility-and-volumetric-properties-of-aqueous-solutions-of-ionic-liquids-as-a-function-of-temperature(23acdca5-1b0f-4418-81d5-5614f55bcc2d).html

http://dx.doi.org/10.1016/j.jct.2009.05.009

http://pure.qub.ac.uk/ws/files/4457635/Wang2009.pdf

http://www.scopus.com/inward/record.url?scp=69049108626&partnerID=8YFLogxK

Idioma(s)

eng

Direitos

info:eu-repo/semantics/restrictedAccess

Fonte

Wang , S , Jacquemin , J , Husson , P , Hardacre , C & Costa Gomes , M F 2009 , ' Liquid-liquid miscibility and volumetric properties of aqueous solutions of ionic liquids as a function of temperature ' The Journal of Chemical Thermodynamics , vol 41 , no. 11 , pp. 1206-1214 . DOI: 10.1016/j.jct.2009.05.009

Palavras-Chave #/dk/atira/pure/subjectarea/asjc/1600/1606 #Physical and Theoretical Chemistry #/dk/atira/pure/subjectarea/asjc/2500 #Materials Science(all) #/dk/atira/pure/subjectarea/asjc/3100/3107 #Atomic and Molecular Physics, and Optics
Tipo

article