title: Chronopotentiometric Evaluation of Ionization Degree and Dissociation Constant of Imidazolium-Based Ionic Liquid [C6Meim][NTf2] in Polymeric Plasticized Membranes
metadata.name: dc.contributor.author
metadata.value: Pokhvishcheva, Nadezhda V
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Gigiadze, Elizaveta K
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Kalinichev, Andrey V
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Ievlev, Alexandr V
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Tyutyukin, Konstantin V
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Peshkova, Maria A
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2022-08-26T22:58:35Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2022-08-26T22:58:35Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2022-01-21
metadata.lang: -
metadata.name: dc.identifier
metadata.value: 10.3390/membranes12020130
metadata.lang: -
metadata.name: dc.identifier.issn
metadata.value: 2077-0375
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/37502
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: Ionic liquids (ILs) have a wide variety of applications in modern electrochemistry due to their unique electrolytic properties. In particular, they are promising candidates as dopants for polymeric membranes in potentiometric sensors and liquid-junction free reference electrodes. However, the effective use of ILs requires a comprehensive understanding of their electrolytic behavior in the polymeric phase. We report here the exploration of the electrolytic and diffusion properties of IL 1-hexyl-3-methyl-1H-imidazol-3-ium bis[(trifluoromethyl)sulfonyl]amide ([C6Meim][NTf2]) in a poly(vinyl chloride) matrix. Chronopotentiometry is utilized to determine the concentration of charge carriers, ionic diffusion coefficients and apparent dissociation constant of [C6Meim][NTf2] in PVC membranes plasticized with a mixture of [C6Meim][NTf2] and bis(2-ethylhexyl) sebacate (DOS) over a wide range of IL concentrations. The diffusion properties of [C6Meim][NTf2] are confirmed by NMR-diffusometry. The non-monotonic electrolytic behavior of the IL in PVC-DOS matrix is described for the first time. A maximum ionization degree and diffusion coefficient is observed at 30 wt.% of IL in the plasticizing mixture. Thus, it is shown that by varying the flexible parameter of the IL to plasticizer ratio in the polymeric phase one can tune the electrolytic and transport properties of sensing PVC membranes.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: This research was funded by the Russian Science Foundation, grant number 20-73-10033
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: MDPI
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Membranes;12
metadata.lang: -
metadata.name: dc.subject
metadata.value: polymeric membranes
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: ion pairs
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: polarity
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: chronopotentiometry
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: diffusion coefficients
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: ionization degree
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: plasticizer
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: ionic liquids
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: ion-selective sensors
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Chronopotentiometric Evaluation of Ionization Degree and Dissociation Constant of Imidazolium-Based Ionic Liquid [C6Meim][NTf2] in Polymeric Plasticized Membranes
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: membranes-12-00130-v2.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/37502/1/membranes-12-00130-v2.pdf
resources.format: Adobe PDF
resources.size: 19,6 MB