| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Tariq, Mohammad
Universidade Nova de Lisboa
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2023Multifunctional magnetoelectric sensing and bending actuator response of polymer-based hybrid materials with magnetic ionic liquidscitations
- 2023CO2 hydrates phase behaviour and onset nucleation temperatures in mixtures of H2O and D2Ocitations
- 2022Structural organization of ionic liquids embedded in fluorinated polymerscitations
- 2022Environmentally friendly carrageenan-based ionic-liquid driven soft actuatorscitations
- 2021Photocurable temperature activated humidity hybrid sensing materials for multifunctional coatingscitations
- 2020Design of Ionic-Liquid-Based Hybrid Polymer Materials with a Magnetoactive and Electroactive Multifunctional Responsecitations
- 2019Ionic-liquid-based printable materials for thermochromic and thermoresistive applicationscitations
- 2018Low-field giant magneto-ionic response in polymer-based nanocompositescitations
- 2013Thermophysical and magnetic studies of two paramagnetic liquid salts: [C(4)mim][FeCl4] and [P-66614][FeCl4]citations
- 2011Characteristics of aggregation in aqueous solutions of dialkylpyrrolidinium bromidescitations
Places of action
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article
Characteristics of aggregation in aqueous solutions of dialkylpyrrolidinium bromides
Abstract
hree pyrrolidinium-based ionic liquids N-dodecyl-N-methylpyrrolidinium bromide, N-butyl-N-octylpyrrolidinium bromide, and N-butyl-N-dodecylpyrrolodinium bromide were synthesized and characterized by their decomposition temperatures (T(d)) measured by thermogravimetric analysis, and by their melting point (T(m)), glass transition (T(g)) and crystallization temperatures (T(cryst)) determined by differential scanning calorimetry. Their self-aggregation properties in aqueous solution were studied and their behavior is compared with that of analogous conventional cationic surfactants, namely tetra-alkylammonium bromide salts. The critical micellar concentration, cmcs were obtained by isothermal titration calorimetry (ITC): which were further validated by measurements of interfacial tension, fluorescence and NMR spectroscopy. Enthalpies of micellization were measured at three different temperatures using ITC. The Taylor dispersion method and DOSY NMR were used to determine diffusion coefficients of the ionic liquid surfactants in aqueous solution at 298.15K. Several correlations between structural features of the surfactant species, such as the number and size of their alkyl chains, and the thermodynamic quantities of micellization expressed by experimental values of cmc, counter-ion binding fraction, Delta(mic)G degrees, Delta(mic)H degrees, and Delta(mic)S degrees-are established. We could interpret the different contributions of the two alkyl side chains to the aggregation properties in terms of the balance of interactions in homogeneous and micellar phases, contributing to understanding the aggregation behavior of ionic liquids in water and the parallel between these systems and traditional ionic surfactants.