Reference : Tentative determination of the acidity level in room temperature ionic liquids by electr...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/78452
Tentative determination of the acidity level in room temperature ionic liquids by electrochemical methods
English
Malherbe, Cédric mailto [Université de Liège - ULg > Département de chimie (sciences) > Chimie analytique et électrochimie >]
Robert, Thierry mailto [Université de Liège - ULg > Département de chimie (sciences) > Chimie analytique et électrochimie >]
Magna, Lionel [Institut Français du Pétrol - IFP > > > >]
Olivier-Bourbigou, Hélène [Institut Français du Pétrol - IFP > > > >]
Gilbert, Bernard mailto [Université de Liège - ULg > Département de chimie (sciences) > Département de chimie (sciences) >]
2009
ECS Transactions
The Electrochemical Society
16
49
3
Yes
International
1938-5862
1938-6737
Pennington
[en] ionic liquids ; Strehlow acidity function
[en] In our attempt to evaluate the acidity levels reached by acidified
ionic liquids (BMImBF4, BMImNTf2 and BMImOTf + HOTf or
HNTf2), the uncertainty on the pKas of the indicators needed for
the Hammett spectrophotometric procedure was pointed out. As
consequence another method is proposed, based on the H+/H2
couple potential measurement. In this purpose, if dynamic methods
failed mainly for lack of sufficient reversibility, potentiometry with
a hydrogen electrode gave meaningful results. The R0(H+)
Strehlow function, could be calculated, using the Fc+-Fc couple as
reference assumed as solvent independent. The obtained results
show that i) the acidities are much higher than those in water; ii)
the acidities measured by the hydrogen electrode are higher than
those measured by the Hammett method; iii) the sequence of
acidities for solutions of similar content of added acid is still BF4 > NTf2 > OTf as previously measured with the Hammett method.
Institut Français du Pétrol - IFP
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/78452

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
ECStrans2009.pdfPublisher postprint315.59 kBRequest copy

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.