Facilitated proton transfer across liquid | liquid interfaces under forced hydrodynamic conditions. Determination of partition coefficients of neutral weak bases

Abstract

Facilitated proton transfer across liquid|liquid interfaces under forced hydrodynamic conditions. Determination of partition coefficients of neutral weak bases. The address for the corresponding author was captured as affiliation for all authors. Please check if appropriate. Jeac(2017),

Flow‐Pattern Characterization of Biphasic Electrochemical Cells by Magnetic Resonance Imaging under Forced Hydrodynamic Conditions

“…The obtained velocity map shows that above the region delimited by the rf-coil sensitive volume, the hydrodynamics is dominated by the presence of counter-rotating vortices characteristic of a TVF regime, in agreement with previous results. [5] The shape and stability of the liquid|liquid interface was monitored using a reference image employing zero amplitude velocity gradients. Since 1,2dichloroethane has a lower proton density than water, a…”

“…Recently we presented a new description for the determination of the partition coefficient of neutral weak bases using a liquid|liquid interface with forced hydrodynamic conditions, where CFD and MRI were used to determine the flow patterns, in particular, the fluid dynamics near the liquid interface. [5] Moreover, for many experimental setups, luggin capillaries are used. For instance, in order to perform quantitative measurements of current or potential at the interface between two immiscible electrolyte solutions, only a fourelectrode setup with capillaries near the interface can provide reliable electrochemical measurements of ion transfer at ITIES.…”

Ametryn detection by proton assisted transfer at a single micro-interface between two immiscible electrolyte solutions

“…Where n was the total number of moles initially present in the system, Vorg and Vaq were the volumes of the organic and aqueous phases, respectively. Previous studies have investigated the effect of the ratio of the volumes of the two phases on the transfer potential and current at either macroscopic ITIES [43,[49][50][51][52][53][54] and thick film modified electrodes [55,56]. By combining equations ( 2), ( 3) and ( 4…”

“…For the second step, the capillary containing the organic phase is transferred to a mildly acidic (pH 3) AME-free solution for a voltammetric detection through proton transfer assisted by AME. The presence of neutral molecules dissolved in the organic phase can indeed facilitate the transfer of proton across the interface by lowering the Gibbs free energy of transfer [37][38][39][40][41][42][43][44][45].…”

An integrated theoretical-experimental approach to understand facilitated proton transfer-electron transfer coupled reactions at thick-film modified electrodes

“…In the case of buffered aqueous solutions, we have examined the variation of the peak current values vs. pH or volume ratio to determine partition coefficients of neutral weak bases at the oil|water interface. These studies were based on the voltammetric responses measured in quiescent solutions [18,20] and under forced hydrodynamic conditions [31]. Additionally, we have developed models for…”