Phase behaviour and heat capacities of selected 1-ethyl-3-methylimidazolium-based ionic liquids II

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F21%3A43922431" target="_blank" >RIV/60461373:22340/21:43922431 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/21:00543822

Výsledek na webu

<a href="https://doi.org/10.1016/j.jct.2021.106392" target="_blank" >https://doi.org/10.1016/j.jct.2021.106392</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jct.2021.106392" target="_blank" >10.1016/j.jct.2021.106392</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Phase behaviour and heat capacities of selected 1-ethyl-3-methylimidazolium-based ionic liquids II

Popis výsledku v původním jazyce

Ionic liquids are widely studied compounds with various potential applications, which are restricted by limited availability and understanding of their properties. Despite being commercially produced in a relatively high purity nowadays, the data on thermodynamic properties of ILs published in the most recent papers still keep large discrepancies. Phase behaviour, heat capacities, and crystal structures are studied in this work for additional eight common ionic liquids based on the 1-ethyl-3-methylimidazolium cation, [C1C2Im], coupled with simple organic or inorganic anions. Special attention is paid for drying of the samples, evaluation of the water content and its impact on the studied properties. All the samples were found to exhibit glass transitions, temperatures of which are determined with respect to the heating rate to simplify comparison with future works. The resulting melting temperatures, fusion enthalpies, and heat capacities are critically compared with the available data from the literature. Yet undescribed complex polymorphic behaviour is detected and resolved for methanesulfonate and dicyanamide salts, [C1C2Im][MeSO3] and [C1C2Im][DCA], respectively. The X-ray powder diffraction analysis for samples melting above the room temperature was performed to support our results. A crystal structure for one of the polymorphs of [C1C2Im][MeSO3] is reported for the first time.

Název v anglickém jazyce

Phase behaviour and heat capacities of selected 1-ethyl-3-methylimidazolium-based ionic liquids II

Popis výsledku anglicky

Ionic liquids are widely studied compounds with various potential applications, which are restricted by limited availability and understanding of their properties. Despite being commercially produced in a relatively high purity nowadays, the data on thermodynamic properties of ILs published in the most recent papers still keep large discrepancies. Phase behaviour, heat capacities, and crystal structures are studied in this work for additional eight common ionic liquids based on the 1-ethyl-3-methylimidazolium cation, [C1C2Im], coupled with simple organic or inorganic anions. Special attention is paid for drying of the samples, evaluation of the water content and its impact on the studied properties. All the samples were found to exhibit glass transitions, temperatures of which are determined with respect to the heating rate to simplify comparison with future works. The resulting melting temperatures, fusion enthalpies, and heat capacities are critically compared with the available data from the literature. Yet undescribed complex polymorphic behaviour is detected and resolved for methanesulfonate and dicyanamide salts, [C1C2Im][MeSO3] and [C1C2Im][DCA], respectively. The X-ray powder diffraction analysis for samples melting above the room temperature was performed to support our results. A crystal structure for one of the polymorphs of [C1C2Im][MeSO3] is reported for the first time.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Chemical Thermodynamics

ISSN

0021-9614

e-ISSN

—

Svazek periodika

160

Číslo periodika v rámci svazku

September

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

106392

Kód UT WoS článku

000659250500012

EID výsledku v databázi Scopus

2-s2.0-85102413600