1,720,984 research outputs found
Transizioni strutturali nella microemulsione AOT/Acqua/Isottano indotte da una proteina solubilizzata
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Mixtures of biocompatible lipids: phase diagrams and microstructure from optical microscopy and NMR self diffusion
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Mesoscopic structure in mixtures of water and 1-butyl-3-methyl imidazolium tetrafluoborate: a multinuclear NMR study
No full textThis work is devoted to highlighting some peculiar aspects of ionic liquid selfaggregation in water, which is still a matter of wide debate. Here, the whole water /1-butyl-3-methyl imidazolium (bmim+) tetrafluoborate (BF4-) phase diagram was thoroughly re-investigated, at a molecular level, by means of 1H and 19F PGSTE and 11B relaxation NMR experiments performed at room temperature. The analysis of H2O, bmim? and BF4 ions self-diffusion coefficients and the 11B relaxation times revealed that ion-pair dissociation is a progressive process starting at a H2O molar fraction equal to 0.2 and ending at high water content. More importantly, the collected results indicate that H2O and ions
diffuse within different domains, strongly suggesting that the system under investigation is actually nanostructured. This fact agrees with some other recent works focusing on the possible mesoscopic order that ionic liquids possess when dissolved in water because of their hydrophobic tail segregation
13C Magnetic relaxation rates and 1H and 13C pramagnetic shifts of Ni(II) complex of Dopamine
No full textMonoolein/water liquid crystals as drug delivery system: Phase behaviour and Dynamic aspects
No full textDivalent metal-acetate complexes in concentrated aqueous solutions.An X-ray diffraction and N.M.R. spectroscopy study.
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