KFU. Card publication. Effect of aromaticity in anion on the cation-anion interactions and ionic mobility in fluorine-free ionic liquids

KAZAN
FEDERAL UNIVERSITY

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EFFECT OF AROMATICITY IN ANION ON THE CATION-ANION INTERACTIONS AND IONIC MOBILITY IN FLUORINE-FREE IONIC LIQUIDS

Form of presentation

Articles in international journals and collections

Year of publication

2020

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Authors, employees of KFU

Gnezdilov Oleg Ivanovich, author

Filippov Andrey Vasilevich, author

Bibliographic description in the original language

Khan I.A, Gnezdilov O.I, Wang Y.-L, Effect of aromaticity in anion on the cation-anion interactions and ionic mobility in fluorine-free ionic liquids//Journal of Physical Chemistry B. - 2020. - Vol.124, P.-11962-11973 .

Annotation

Ionic liquids (ILs) composed of tetra(n-butyl)phosphonium [P4444]+ and tetra(nbutyl) ammonium [N4444]+ cations paired with 2-furoate [FuA]−, tetrahydo-2-furoate [HFuA]−, and thiophene-2-carboxylate [TpA]− anions are prepared to investigate the effects of electron delocalization in anion and the mutual interactions between cations and anions on their physical and electrochemical properties. The [P4444]+ cations-based ILs are found to be liquids, while the [N4444]+ cations-based ILs are semi-solids at room temperature. Thermogravimetric analysis revealed higher decomposition temperatures and differential scanning calorimetry analysis showed lower glass transition temperatures for phosphonium-based ILs than the ammoniumbased counterparts. The ILs are arranged in the decreasing order of their ionic conductivities as [P4444][HFuA] (0.069 mS cm−1) > [P4444][FuA] (0.032 mS cm−1) > [P4444][TpA] (0.028 mS cm−1) at 20 ?C. The oxidative limit of the ILs followed the sequence of [FuA]−> [TpA]−> [HFuA]−, as measured by linear sweep voltammetry. This order can be attributed to the electrons' delocalization in [FuA]− and in [TpA]− aromatic anions, which has enhanced the oxidative limit potentials and the overall electrochemical stabilities.

Keywords

Ionic liquids, tetra(n-butyl)phosphonium, tetra(nbutyl) ammonium, cations, electron delocalization, glass transition temperatures, ionic conductivities, diffusion, NMR

The name of the journal

Journal of Physical Chemistry B

URL

https://dx.doi.org/10.1021/acs.jpcb.0c08421

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=246850&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Gnezdilov Oleg Ivanovich	ru_RU
dc.contributor.author	Filippov Andrey Vasilevich	ru_RU
dc.date.accessioned	2020-01-01T00:00:00Z	ru_RU
dc.date.available	2020-01-01T00:00:00Z	ru_RU
dc.date.issued	2020	ru_RU
dc.identifier.citation	Khan I.A, Gnezdilov O.I, Wang Y.-L, Effect of aromaticity in anion on the cation-anion interactions and ionic mobility in fluorine-free ionic liquids//Journal of Physical Chemistry B. - 2020. - Vol.124, P.-11962-11973 .	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=246850&p_lang=2	ru_RU
dc.description.abstract	Journal of Physical Chemistry B	ru_RU
dc.description.abstract	Ionic liquids (ILs) composed of tetra(n-butyl)phosphonium [P4444]+ and tetra(nbutyl) ammonium [N4444]+ cations paired with 2-furoate [FuA]−, tetrahydo-2-furoate [HFuA]−, and thiophene-2-carboxylate [TpA]− anions are prepared to investigate the effects of electron delocalization in anion and the mutual interactions between cations and anions on their physical and electrochemical properties. The [P4444]+ cations-based ILs are found to be liquids, while the [N4444]+ cations-based ILs are semi-solids at room temperature. Thermogravimetric analysis revealed higher decomposition temperatures and differential scanning calorimetry analysis showed lower glass transition temperatures for phosphonium-based ILs than the ammoniumbased counterparts. The ILs are arranged in the decreasing order of their ionic conductivities as [P4444][HFuA] (0.069 mS cm−1) > [P4444][FuA] (0.032 mS cm−1) > [P4444][TpA] (0.028 mS cm−1) at 20 ?C. The oxidative limit of the ILs followed the sequence of [FuA]−> [TpA]−> [HFuA]−, as measured by linear sweep voltammetry. This order can be attributed to the electrons' delocalization in [FuA]− and in [TpA]− aromatic anions, which has enhanced the oxidative limit potentials and the overall electrochemical stabilities.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Ionic liquids	ru_RU
dc.subject	tetra(n-butyl)phosphonium	ru_RU
dc.subject	tetra(nbutyl) ammonium	ru_RU
dc.subject	cations	ru_RU
dc.subject	electron delocalization	ru_RU
dc.subject	glass transition temperatures	ru_RU
dc.subject	ionic conductivities	ru_RU
dc.subject	diffusion	ru_RU
dc.subject	NMR	ru_RU
dc.title	Effect of aromaticity in anion on the cation-anion interactions and ionic mobility in fluorine-free ionic liquids	ru_RU
dc.type	Articles in international journals and collections	ru_RU