6533b7dcfe1ef96bd1272b69

RESEARCH PRODUCT

p-Nitrophenolate: A Probe for Determining Acid Strength in Ionic Liquids

Renato NotoFrancesca D'annaSandra La Marca

subject

chemistry.chemical_classificationAqueous solutionMolecular StructureCarboxylic acidOrganic ChemistryInorganic chemistryCarboxylic AcidsIonic LiquidsWaterProtonationSettore CHIM/06 - Chimica OrganicaHydrogen-Ion ConcentrationNitrophenolsSolutionsAcid strengthNitrophenolchemistry.chemical_compoundchemistryIonic Liquids Carboxylic acids Acidity measurementsIonic liquidMoleculeTitration

description

In order to obtain an acidity scale in room-temperature ionic liquid solutions, the protonation equilibrium of sodium p-nitrophenolate in [bm(2)im][NTf(2)] and in [bmpyrr][NTf(2)], at 298 K, has been studied by means of spectrophotometric titration. Carboxylic acids differing in both structure and in water solution strength have been used. Data collected indicate that in the analyzed ionic liquid solutions carboxylic acids are less dissociated than in water solution. Furthermore, by virtue of a mutual interaction, the studied equilibrium seems to be affected by both the nature of the ionic liquids and the carboxylic acids.

yearjournalcountryeditionlanguage
2009-01-28The Journal of Organic Chemistry
https://doi.org/10.1021/jo802473p