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][BF4]) we examined the behaviour of some probes in [bmim][BF4]/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 relevant4-benzoylamino-2,5-diphenyl-1,2,3-triazole as well as the spectrometric properties of pyrene and Nile Red were evaluated. With the samepurpose also 1H 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 determinea partially preorganized structure for [bmim][X]. This is perturbed at some degrees by quantity and nature of guest molecules. For exampleconductivity measurements support the idea that different charged aggregates are present in the [bmim][X]/co-solvent binary mixtures.
|Numero di pagine||9|
|Stato di pubblicazione||Published - 2008|
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