Non-monotonic Soret coefficients of aqueous LiCl solutions with varying concentrations

Lee, Namkyu; Mohanakumar, Shilpa; Briels, W. J.; Wiegand, Simone

doi:10.1039/d3cp06061f

Phys. Chem. Chem. Phys.

2024

DOI: 10.1039/d3cp06061f

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Non-monotonic Soret coefficients of aqueous LiCl solutions with varying concentrations

Namkyu Lee,

Shilpa Mohanakumar,

W. J. Briels

et al.

Abstract: We investigate the thermodiffusive properties of aqueous solutions of lithium chloride, using thermal diffusion forced Rayleigh scattering in a concentration range of 0.5 – 2 mole per kg of solvent...

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Cited by 2 publications

References 37 publications

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Deciphering the guanidinium cation: Insights into thermal diffusion

Rudani,

Jakubowski,

Kriegs

et al. 2024

The Journal of Chemical Physics

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Thermophoresis, or thermodiffusion, is becoming a more popular method for investigating the interactions between proteins and ligands due to its high sensitivity to the interactions between solutes and water. Despite its growing use, the intricate mechanisms behind thermodiffusion remain unclear. This gap in knowledge stems from the complexities of thermodiffusion in solvents that have specific interactions as well as the intricate nature of systems that include many components with both non-ionic and ionic groups. To deepen our understanding, we reduce complexity by conducting systematic studies on aqueous salt solutions. In this work, we focused on how guanidinium salt solutions behave in a temperature gradient, using thermal diffusion forced Rayleigh scattering experiments at temperatures ranging from 15 to 35 °C. We looked at the thermodiffusive behavior of four guanidinium salts (thiocyanate, iodide, chloride, and carbonate) in solutions with concentrations ranging from 1 to 3 mol/kg. The guanidinium cation is disk-shaped and is characterized by flat hydrophobic surfaces and three amine groups, which enable directional hydrogen bonding along the edges. We compare our results to the behavior of salts with spherical cations, such as sodium, potassium, and lithium. Our discussions are framed around how different salts are solvated, specifically in the context of the Hofmeister series, which ranks ions based on their effects on the solvation of proteins.

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Deciphering the guanidinium cation: Insights into thermal diffusion

Rudani,

Jakubowski,

Kriegs

et al. 2024

The Journal of Chemical Physics

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show abstract

Thermal transport of alkali halide aqueous solutions: a non-equilibrium molecular dynamics investigation

Bresme,

Vasey

2024

Molecular Physics

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Non-monotonic Soret coefficients of aqueous LiCl solutions with varying concentrations

Abstract: We investigate the thermodiffusive properties of aqueous solutions of lithium chloride, using thermal diffusion forced Rayleigh scattering in a concentration range of 0.5 – 2 mole per kg of solvent...

Cited by 2 publications

References 37 publications

Deciphering the guanidinium cation: Insights into thermal diffusion

Deciphering the guanidinium cation: Insights into thermal diffusion

Thermal transport of alkali halide aqueous solutions: a non-equilibrium molecular dynamics investigation

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