On the characterization of some [bmim][X]/co-solvent binary mixtures: a multidisciplinary approach by using kinetic, spectrophotometric and conductometric investigations
| Autor: | Francesca D'Anna, Vincenzo Frenna, Sandra La Marca, Renato Noto, Vitalba Pace, Domenico Spinelli |
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| Přispěvatelé: | D'ANNA F, FRENNA V, LA MARCA S, NOTO R, PACE V, SPINELLI D |
| Rok vydání: | 2008 |
| Předmět: |
ionic liquids
binary mixtures MHR reaction spectrophometric measurements Tetrafluoroborate Chemistry Organic Chemistry Nile red Analytical chemistry Settore CHIM/06 - Chimica Organica Conductivity Biochemistry chemistry.chemical_compound Reaction rate constant Drug Discovery Ionic liquid Proton NMR Pyrene Molecule |
| Zdroj: | Tetrahedron. 64:672-680 |
| ISSN: | 0040-4020 |
| DOI: | 10.1016/j.tet.2007.11.033 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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