Counterion-Regulated Dynamics of Water Confined in Lyotropic Liquid Crystalline Morphologies
| Autor: | Mahesh K. Mahanthappa, Arun Yethiraj, Grayson L. Jackson, Sriteja Mantha |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Materials science Properties of water 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrostatics 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Condensed Matter::Soft Condensed Matter chemistry.chemical_compound Membrane Pulmonary surfactant chemistry Chemical physics Lyotropic Quasielastic neutron scattering Materials Chemistry Molecule Physical and Theoretical Chemistry Counterion 0210 nano-technology |
| Zdroj: | The journal of physical chemistry. B. 122(8) |
| ISSN: | 1520-5207 |
| Popis: | The dynamics of confined water is of fundamental and long-standing interest. In technologically important forms of confinement, such as proton-exchange membranes, electrostatic interactions with the confining matrix and counterions play significant roles on the properties of water. There has been recent interest on the dynamics of water confined to the lyotropic liquid crystalline (LLC) morphologies of Gemini dicarboxylate surfactants. These systems are exciting because the nature of confinement, for example, size and curvature of channels and surface functionality is dictated by the chemistry of the self-assembling surfactant molecules. Quasielastic neutron scattering experiments have shown an interesting dependence of the water self-diffusion constant, Dα, on the identity (denoted α) of the counterion: at high hydration, the magnitude of the water self-diffusion constant is in the order DTMA < DNa < DK, where TMA, Na, and K refer to tetramethyl ammonium, sodium, and potassium counterions, respectively. ... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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