The Influence of Deuterium Isotope Effects on Structural Rearrangements, Ensemble Equilibria, and Hydrogen Bonding in Protic Ionic Liquids Full article
Journal |
ChemPhysChem
ISSN: 1439-4235 , E-ISSN: 1439-7641 |
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Output data | Year: 2022, Volume: 23, Number: 23, Article number : e202200557, Pages count : 6 DOI: 10.1002/cphc.202200557 | ||||||||
Tags | isotope effects, ionic liquids, hydrogen bonding, solid state NMR spectroscopy, thermodynamics | ||||||||
Authors |
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Affiliations |
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Funding (3)
1 | German Research Foundation | LU 506/15 (401427621) |
2 | Russian Science Foundation | 21-13-00047 |
3 | Alexander von Humboldt Foundation |
Abstract:
We report strong isotope effects for the protic ionic liquid triethylammonium methanesulfonate [TEA][OMs] by means of deuterium solid-state NMR spectroscopy covering broad temperature ranges from 65 K to 313 K. Both isotopically labelled PILs differ in non-deuterated and fully deuterated ethyl groups of the triethyl ammonium cations. The N-D bond of both cations is used as sensitive probe for hydrogen bonding and structural ordering. The 2 H NMR line shape analysis provides the deuteron quadrupole coupling constants and the characteristics of a broad heterogeneous phase with simultaneously present static and mobile states indicating plastic crystal behavior. The temperatures where both states are equally populated differ by about 80 K for the two PILs, showing that deuteration of the ethyl groups in the trialkylammonium cations tremendously shifts the equilibrium towards the static state. In addition, it leads to a significant less cooperative transition, associated with a significantly reduced standard molar transition entropy.
Cite:
Khudozhitkov A.E.
, Stange P.
, Paschek D.
, Stepanov A.G.
, Kolokolov D.I.
, Ludwig R.
The Influence of Deuterium Isotope Effects on Structural Rearrangements, Ensemble Equilibria, and Hydrogen Bonding in Protic Ionic Liquids
ChemPhysChem. 2022. V.23. N23. e202200557 :1-6. DOI: 10.1002/cphc.202200557 WOS Scopus РИНЦ
The Influence of Deuterium Isotope Effects on Structural Rearrangements, Ensemble Equilibria, and Hydrogen Bonding in Protic Ionic Liquids
ChemPhysChem. 2022. V.23. N23. e202200557 :1-6. DOI: 10.1002/cphc.202200557 WOS Scopus РИНЦ
Dates:
Submitted: | Jul 28, 2022 |
Accepted: | Aug 8, 2022 |
Published online: | Aug 9, 2022 |
Published print: | Dec 5, 2022 |
Identifiers:
Web of science | WOS:000849808100001 |
Scopus | 2-s2.0-85137356034 |
Elibrary | 50783470 |
Chemical Abstracts | 2022:2322774 , 2022:3012097 |
PMID | 35944124 |
OpenAlex | W4292457893 |