Ion-Transfer Electrochemistry at Arrays of Nanointerfaces between Immiscible Electrolyte Solutions Confined within Silicon Nitride Nanopore Membranes

2010 ◽  
Vol 82 (14) ◽  
pp. 6115-6123 ◽  
Author(s):  
Micheál D. Scanlon ◽  
Jörg Strutwolf ◽  
Alan Blake ◽  
Daniela Iacopino ◽  
Aidan J. Quinn ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Electrolyte Solutions ◽  
Ion Transfer ◽  
Nanopore Membranes

scholarly journals Detection of Perfluorooctane Sulfonate by Ion-Transfer Stripping Voltammetry at an Array of Microinterfaces Between Two Immiscible Electrolyte Solutions

2020 ◽  
Author(s):  
Benjamin N. Viada ◽  
L. Mabel Yudi ◽  
Damien Arrigan
Keyword(s):  
Analytical Approach ◽  
Matrix Effects ◽  
Stripping Voltammetry ◽  
Perfluorooctane Sulfonate ◽  
Electrolyte Solutions ◽  
Ion Transfer

We present an analytical approach for the detection of perfluorooctane sulfonate (PFOS) by ion transfer stripping voltammetry at an array of micro-interfaces between two immiscible electrolyte solutions. With this approach, picomolar concentrations are detected and environmental matrix effects are evaluated.

scholarly journals Simple Ion Transfer at Liquid|Liquid Interfaces

2012 ◽  
Vol 2012 ◽  
pp. 1-34 ◽  
Author(s):  
L. J. Sanchez Vallejo ◽  
J. M. Ovejero ◽  
R. A. Fernández ◽  
S. A. Dassie
Keyword(s):  
Charge Transfer ◽  
Numerical Simulations ◽  
Phase Transfer ◽  
Electrolyte Solutions ◽  
Ion Transfer ◽  
Liquid Interfaces ◽  
Practical Applications ◽  
Theoretical Approaches ◽  
Charge Transfer Reactions

The main aspects related to the charge transfer reactions occurring at the interface between two immiscible electrolyte solutions (ITIES) are described. The particular topics to be discussed involve simple ion transfer. Focus is given on theoretical approaches, numerical simulations, and experimental methodologies. Concerning the theoretical procedures, different computational simulations related to simple ion transfer are reviewed. The main conclusions drawn from the most accepted models are described and analyzed in regard to their relevance for explaining different aspects of ion transfer. We describe numerical simulations implementing different approaches for solving the differential equations associated with the mass transport and charge transfer. These numerical simulations are correlated with selected experimental results; their usefulness in designing new experiments is summarized. Finally, many practical applications can be envisaged regarding the determination of physicochemical properties, electroanalysis, drug lipophilicity, and phase-transfer catalysis.

Determination of rate constants of ion transfer kinetics across immiscible electrolyte solutions

1998 ◽  
Vol 44 (1) ◽  
pp. 59-71 ◽  
Author(s):  
José A Manzanares ◽  
Riikka Lahtinen ◽  
Bernie Quinn ◽  
Kyösti Kontturi ◽  
David J Schiffrin
Keyword(s):  
Rate Constants ◽  
Electrolyte Solutions ◽  
Ion Transfer

scholarly journals Ion solvation in aqueous–organic mixtures

2005 ◽  
Vol 77 (3) ◽  
pp. 605-617 ◽  
Author(s):  
Glenn Hefter
Keyword(s):  
Direct Methods ◽  
Electrolyte Solutions ◽  
Model Systems ◽  
Ion Solvation ◽  
Solvent Mixtures ◽  
Ion Transfer ◽  
Solvent Interactions ◽  
Organic Mixtures ◽  
Gibbs Energies ◽  
Donor Acceptor

The importance of ion solvation in determining the properties of electrolyte solutions in aqueous–organic solvent mixtures is discussed. Solubility measurements are shown to be particularly useful for determining the Gibbs energies of transfer of ions between solvents, which reflect differences in the overall solvation of the ions in different solvent mixtures. Solubility measurements can also be used to determine the other thermodynamic parameters of transfer, but such quantities are usually better obtained by more direct methods. The inadequacy of current theories of ion solvation to quantitatively account for the thermodynamics of ion transfer is discussed by reference to measurements on some simple model systems. Although donor/acceptor interactions can explain many of the observed effects between pure solvents, the situation is more complex in aqueous–organic mixtures because selective solvation and even solvent–solvent interactions may become significant. This is illustrated by consideration of ion transfer from water to water + t-butanol solutions, where spectacular effects are observed in the enthalpies and entropies and especially in the heat capacities and volumes.

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