Response of PVC membrane ion-selective electrodes to alkylmethylimidazolium ionic liquid cations

Zhuo, Kelei; Wei, Yujing; Ma, Jingjing; Chen, Yujuan; Bai, Guangyue

doi:10.1016/j.snb.2013.05.023

Cited by 11 publications

(4 citation statements)

References 38 publications

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“…A silver wire (>99.99% from Aldrich) was coiled and washed with dilute nitric acid before use. Tetraphenylphosphonium tetraphenylborate (TP + TB – ), 1-ethyl-3-methylimidazolium tetraphenylborate (emim + TB – ), , tetraphenylphosphonium bis(trifluoromethanesulfonyl)imide (TP + NTf 2 – ), tetraethylammonium bis(trifluoromethanesulfonyl)imide (Et 4 N + NTf 2 – ), tetrabutylammonium bis(trifluoromethanesulfonyl)imide (Bu 4 N + NTf 2 – ), tetrabutylammonium tetrabutylborate (Bu 4 N + Bu 4 B – ), ferrocenium bis(trifluoromethanesulfonyl)imide (Fc + NTf 2 – ), − and [Ru(bpy) 2 (dmb)] 2+ (PF 6 – ) 2 were prepared according to the reported methods. 1-Ethyl-3-methylimidazolium picrate (emim + pic – ) was prepared in a similar manner to the reported procedure .…”

Section: Methodsmentioning

confidence: 99%

“…A silver wire (>99.99% from Aldrich) was coiled and washed with dilute nitric acid before use. Tetraphenylphosphonium tetraphenylborate (TP + TB − ), 63 1-ethyl-3-methylimidazolium tetraphenylborate (emim + TB − ), 149,150 tetraphenylp h o s p ho n i um bi s ( t r ifl uoromethanesulfonyl)imide ( T P + N T f 2 − ) , were prepared according to the reported methods. 1-Ethyl-3methylimidazolium picrate (emim + pic − ) was prepared in a similar manner to the reported procedure.…”

Section: ■ Conclusionmentioning

confidence: 99%

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Experimental Insight into the Thermodynamics of the Dissolution of Electrolytes in Room-Temperature Ionic Liquids: From the Mass Action Law to the Absolute Standard Chemical Potential of a Proton

2016

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Room-temperature ionic liquids (ILs) are a class of nonaqueous solvents that have expanded the realm of modern chemistry, drawing increasing interest over the last few decades, not only in terms of their own unique physical chemistry but also in many applications including organic synthesis, electrochemistry, and biological systems, wherein charged solutes (i.e., electrolytes) often play vital roles. However, our fundamental understanding of the dissolution of an electrolyte in an IL is still rather limited. For example, the activity of a charged species has frequently been assumed to be unity without a clear experimental basis. In this study, we have discussed a standard component-based scheme for the dissolution of an electrolyte in an IL, supported by our observation of ideal Nernstian responses for the reduction of silver and ferrocenium salts in a representative IL, 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([emim + ][NTf 2 – ] or [emim + ][TFSI – ]). Using this scheme, which was also supported by temperature-dependent measurements with ILs having longer alkyl chains in the imidazolium ring, and the solubility of the IL in water, we established the concept of Gibbs transfer energies of “pseudo-single ions” from the IL to conventional neutral molecular solvents (water, acetonitrile, and methanol). This concept, which bridges component- and constituent-based energetics, utilizes an extrathermodynamic assumption, which itself was justified by experimental observations. These energies enable us to eliminate inner potential differences between the IL and molecular solvents (solvent–solvent interactions), that is, on a practical level, conditional liquid junction potential differences, so that we can discuss ion–solvent interactions independently. Specifically, we have examined the standard electrode potential of the ferrocenium/ferrocene redox couple, Fc + /Fc, and the absolute intrinsic standard chemical potential of a proton in [emim + ][NTf 2 – ], finding that the proton is more acidic in the IL than in water by 6.5 ± 0.6 units on the unified pH scale. These results strengthen the progress on the physical chemistry of ions in IL solvent systems on the basis of their activities, providing a rigorous thermodynamic framework.

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Section: Methodsmentioning

confidence: 99%

Section: ■ Conclusionmentioning

confidence: 99%

Experimental Insight into the Thermodynamics of the Dissolution of Electrolytes in Room-Temperature Ionic Liquids: From the Mass Action Law to the Absolute Standard Chemical Potential of a Proton

2016

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“…In another article, several electrodes sensitive to cations from the alkylmethylimidazoliums group were described. [75] The classic polymer membrane in such ISEs was enriched with alkylmethylimidazolium tetraphenylborates ionic liquids differing in the number of carbons (C n MIm-TPB, n = 2-10). The ILs here also acted as ion exchangers and, in addition, exhibited ion-sensitive capabilities towards C n MIm + .…”

Section: Ionic Liquids -Membrane Constituentsmentioning

confidence: 99%

Application of ionic liquids in ion‐selective electrodes and reference electrodes: A review

Morawska,

Wardak

2024

ChemPhysChem

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: Ionic liquids (ILs) are organic chemical compounds that are composed only of ions, a large organic cation and a smaller inorganic or organic anion. These are salts whose melting point is lower than the boiling point of water. ILs have many interesting properties, thanks to which they find great practical applications in analytics, electrochemistry, separation techniques, catalysis and others. One of the many areas of application of ionic liquids is sensors especially electrochemical sensors including ion‐selective electrodes. In this case, the properties of ILs that are particularly useful include very good electrical conductivity, high electrochemical stability, good extraction properties, hydrophobic character and compatibility with other materials, e.g. polyvinyl chloride plasticizers or carbon nanomaterials. ILs were used as components of ion‐selective membranes, both polymeric ones based on PVC and membranes in carbon paste electrodes. ILs performed various functions in these membranes, including lipophilic ionic additive, ionophore/ion exchanger, plasticizer, transducer media and matrix. They were also used as a component of the intermediate layer in solid contact ISEs. The last chapter presents examples of the use of ILs in reference electrodes. This review discusses the use of ionic liquids in ion‐selective electrodes (ISEs) and reference electrodes over the last ten years.

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“…Moreover, different functional groups are utilized to promote extraction of the target analyte, thus resulting in different chromatographic [ 15 ] and sensing [ 16 ] performance. As extraction solvents, RTILs, therefore, have excellent potential for utilization in ion exchange-based sensors [ 17 ]. However, it must be noted that the role of RTILs in these sensors is not yet fully understood.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ionic Liquids on the Selectivity of Ion Exchange-Based Polymer Membrane Sensing Layers

Mendecki

Callan²,

Ahern³

et al. 2016

Sensors

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The applicability of ion exchange membranes is mainly defined by their permselectivity towards specific ions. For instance, the needed selectivity can be sought by modifying some of the components required for the preparation of such membranes. In this study, a new class of materials –trihexyl(tetradecyl)phosphonium based ionic liquids (ILs) were used to modify the properties of ion exchange membranes. We determined selectivity coefficients for iodide as model ion utilizing six phosphonium-based ILs and compared the selectivity with two classical plasticizers. The dielectric properties of membranes plasticized with ionic liquids and their response characteristics towards ten different anions were investigated using potentiometric and impedance measurements. In this large set of data, deviations of obtained selectivity coefficients from the well-established Hofmeister series were observed on many occasions thus indicating a multitude of applications for these ion-exchanging systems.

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Response of PVC membrane ion-selective electrodes to alkylmethylimidazolium ionic liquid cations

Cited by 11 publications

References 38 publications

Experimental Insight into the Thermodynamics of the Dissolution of Electrolytes in Room-Temperature Ionic Liquids: From the Mass Action Law to the Absolute Standard Chemical Potential of a Proton

Experimental Insight into the Thermodynamics of the Dissolution of Electrolytes in Room-Temperature Ionic Liquids: From the Mass Action Law to the Absolute Standard Chemical Potential of a Proton

Application of ionic liquids in ion‐selective electrodes and reference electrodes: A review

Influence of Ionic Liquids on the Selectivity of Ion Exchange-Based Polymer Membrane Sensing Layers

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