Phase behaviour and heat capacities of 1-butyl-1-methylpyrrolidinium-based ionic liquids with fluoro-sulfonate anions
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F22%3A43924288" target="_blank" >RIV/60461373:22340/22:43924288 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.jil.2021.100016" target="_blank" >https://doi.org/10.1016/j.jil.2021.100016</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jil.2021.100016" target="_blank" >10.1016/j.jil.2021.100016</a>
Alternative languages
Result language
angličtina
Original language name
Phase behaviour and heat capacities of 1-butyl-1-methylpyrrolidinium-based ionic liquids with fluoro-sulfonate anions
Original language description
yrrolidinium-based ionic liquids belong to the relatively common classes of these compounds; however, there are serious gaps in the knowledge and interpretation flaws of their physico-chemical properties, except for those containing the archetypal bistriflimide [NTf2] anion. Compounds combining the 1-butyl-1-methylpyrrolidinium cation [C4C1Pyrr] with various fluorinated sulfonate anions exhibit vast polymorphism, rendering the thermodynamic description even more complicated. Four 1-butyl-1-methylpyrrolidinium ionic liquids, available commercially in high purities, were subjugated to a combined calorimetric and crystallographic study with a special emphasis on establishing a complete interpretation of their phase behaviour.The samples were dried by vacuum heating and their purity was verified using the Karl Fischer titration and van't Hoff analysis of the melting peaks. Polymorphism was readily detected for all four compounds, but a complete description of their phase behaviour required an intensive and careful labour. Despite our experimental efforts, some of the polymorphs were found to be too elusive for a complete characterization by any of the used techniques. The obtained phase-transition temperatures and enthalpies were critically compared to the available literature with a variable agreement. While the existing thermodynamic data for [C4C1Pyrr][NTf2] were found complete and sensible, literature data for the other compounds were incomplete or ambiguous. Heat capacities of the four compounds were determined using a Tian-Calvet calorimeter, the results of which were in a good agreement with the existing adiabatic-calorimetric data for [C4C1Pyrr][NTf2]. Several crystal structures were newly resolved within the phase behaviour study and they are reported in the paper.
Czech name
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Czech description
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Classification
Type
J<sub>ost</sub> - Miscellaneous article in a specialist periodical
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GJ19-04150Y" target="_blank" >GJ19-04150Y: Cohesive properties and phase equilibria of ionic liquids investigated by state of the art calculations and experiments</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Ionic Liquids
ISSN
2772-4220
e-ISSN
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Volume of the periodical
2
Issue of the periodical within the volume
1
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
15
Pages from-to
100016
UT code for WoS article
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EID of the result in the Scopus database
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