6533b834fe1ef96bd129cc80

RESEARCH PRODUCT

On the characterization of some [bmim][X]/co-solvent binary mixtures: a multidisciplinary approach by using kinetic, spectrophotometric and conductometric investigations

Francesca D'annaVincenzo FrennaSandra La MarcaRenato NotoVitalba PaceDomenico Spinelli

subject

ionic liquids binary mixtures MHR reaction spectrophometric measurementsTetrafluoroborateChemistryOrganic ChemistryNile redAnalytical chemistrySettore CHIM/06 - Chimica OrganicaConductivityBiochemistrychemistry.chemical_compoundReaction rate constantDrug DiscoveryIonic liquidProton NMRPyreneMolecule

description

Abstract In order to study the intrinsic characteristics and to evaluate the structural variations determined by the addition of a co-solvent to 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF 4 ]) we examined the behaviour of some probes in [bmim][BF 4 ]/co-solvent binary mixtures. The rate constants of the piperidino-catalyzed rearrangement of the Z -phenylhydrazone of the 3-benzoyl-5-phenyl-1,2,4-oxadiazole into the relevant 4-benzoylamino-2,5-diphenyl-1,2,3-triazole as well as the spectrometric properties of pyrene and Nile Red were evaluated. With the same purpose also 1 H NMR and conductivity measurements were carried out. By comparison the behaviour of 1-butyl-3-methylimidazolium bis-(trifluoromethylsulfonylimide)/1,4-dioxane mixtures has been analyzed. The whole of data confirms the presence of weak interactions that determine a partially preorganized structure for [bmim][X]. This is perturbed at some degrees by quantity and nature of guest molecules. For example conductivity measurements support the idea that different charged aggregates are present in the [bmim][X]/co-solvent binary mixtures.

yearjournalcountryeditionlanguage
2008-01-01Tetrahedron
https://doi.org/10.1016/j.tet.2007.11.033