Mixing divalent ionic liquids: effects of charge and side-chains

Eduards Bakis; Adriaan van den Bruinhorst; Laure Pison; Ivan Palazzo; Thomas Chang; Marianne Kjellberg; Cameron C. Weber; Margarida Costa Gomes; Tom Welton

doi:10.1039/d1cp00208b

Mixing divalent ionic liquids: effects of charge and side-chains

Eduards Bakis, Adriaan van den Bruinhorst, Laure Pison, Ivan Palazzo, Thomas Chang, Marianne Kjellberg, Cameron C. Weber, Margarida Costa Gomes (Corresponding Author), Tom Welton (Corresponding Author)

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

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Abstract

We have prepared novel divalent ionic liquids (ILs) based on the bis(trifluoromethylsulfonyl)imide anion where two charged imidazolium groups in the cations are either directly bound to each other or linked by a single atom. We assessed the influence of the side-chain functionality and divalency on their physical properties and on the thermodynamics of mixing. The results indicate that shortening the spacer of a divalent IL reduces its thermal stability and increases its viscosity. Mixtures of divalent and monovalent ILs show small but significant deviations from ideality upon mixing. These deviations appear to depend primarily on the (mis)match of the nature and length of the cation side-chain. The non-ideality imposed by mixing ILs with different side-chains appears to be enhanced by the increase in formal charge of the cations in the mixture.

Original language	English
Pages (from-to)	4624-4635
Number of pages	12
Journal	Physical Chemistry Chemical Physics
Volume	23
Issue number	8
DOIs	https://doi.org/10.1039/d1cp00208b
Publication status	Published - 28 Feb 2021
Externally published	Yes

Field of Science*

1.3 Physical sciences

Publication Type*

1.1. Scientific article indexed in Web of Science and/or Scopus database

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10.1039/d1cp00208bLicence: CC BY-NC

Mixing divalent ionic liquidsFinal published version, 3.33 MBLicence: CC BY-NC

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title = "Mixing divalent ionic liquids: effects of charge and side-chains",

abstract = "We have prepared novel divalent ionic liquids (ILs) based on the bis(trifluoromethylsulfonyl)imide anion where two charged imidazolium groups in the cations are either directly bound to each other or linked by a single atom. We assessed the influence of the side-chain functionality and divalency on their physical properties and on the thermodynamics of mixing. The results indicate that shortening the spacer of a divalent IL reduces its thermal stability and increases its viscosity. Mixtures of divalent and monovalent ILs show small but significant deviations from ideality upon mixing. These deviations appear to depend primarily on the (mis)match of the nature and length of the cation side-chain. The non-ideality imposed by mixing ILs with different side-chains appears to be enhanced by the increase in formal charge of the cations in the mixture.",

author = "Eduards Bakis and {van den Bruinhorst}, Adriaan and Laure Pison and Ivan Palazzo and Thomas Chang and Marianne Kjellberg and Weber, {Cameron C.} and {Costa Gomes}, Margarida and Tom Welton",

note = "Funding Information: EB acknowledges UK Engineering and Physical Sciences Research Council for funding of doctoral studies, MCG and LP thank the Institute of Chemistry at Clermont-Ferrand for the use of the densimeter and the viscometer. MCG and AvdB acknowledge the financial support of the project IDEXLYON of the University of Lyon (ANR-16-IDEX-0005). TW acknowledges an ERC Advanced Investigator Grant for funding. Publisher Copyright: {\textcopyright} the Owner Societies 2021.",

year = "2021",

month = feb,

day = "28",

doi = "10.1039/d1cp00208b",

language = "English",

volume = "23",

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journal = "Physical Chemistry Chemical Physics",

issn = "1463-9076",

publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Mixing divalent ionic liquids

T2 - effects of charge and side-chains

AU - Bakis, Eduards

AU - van den Bruinhorst, Adriaan

AU - Pison, Laure

AU - Palazzo, Ivan

AU - Chang, Thomas

AU - Kjellberg, Marianne

AU - Weber, Cameron C.

AU - Costa Gomes, Margarida

AU - Welton, Tom

N1 - Funding Information: EB acknowledges UK Engineering and Physical Sciences Research Council for funding of doctoral studies, MCG and LP thank the Institute of Chemistry at Clermont-Ferrand for the use of the densimeter and the viscometer. MCG and AvdB acknowledge the financial support of the project IDEXLYON of the University of Lyon (ANR-16-IDEX-0005). TW acknowledges an ERC Advanced Investigator Grant for funding. Publisher Copyright: © the Owner Societies 2021.

PY - 2021/2/28

Y1 - 2021/2/28

N2 - We have prepared novel divalent ionic liquids (ILs) based on the bis(trifluoromethylsulfonyl)imide anion where two charged imidazolium groups in the cations are either directly bound to each other or linked by a single atom. We assessed the influence of the side-chain functionality and divalency on their physical properties and on the thermodynamics of mixing. The results indicate that shortening the spacer of a divalent IL reduces its thermal stability and increases its viscosity. Mixtures of divalent and monovalent ILs show small but significant deviations from ideality upon mixing. These deviations appear to depend primarily on the (mis)match of the nature and length of the cation side-chain. The non-ideality imposed by mixing ILs with different side-chains appears to be enhanced by the increase in formal charge of the cations in the mixture.

AB - We have prepared novel divalent ionic liquids (ILs) based on the bis(trifluoromethylsulfonyl)imide anion where two charged imidazolium groups in the cations are either directly bound to each other or linked by a single atom. We assessed the influence of the side-chain functionality and divalency on their physical properties and on the thermodynamics of mixing. The results indicate that shortening the spacer of a divalent IL reduces its thermal stability and increases its viscosity. Mixtures of divalent and monovalent ILs show small but significant deviations from ideality upon mixing. These deviations appear to depend primarily on the (mis)match of the nature and length of the cation side-chain. The non-ideality imposed by mixing ILs with different side-chains appears to be enhanced by the increase in formal charge of the cations in the mixture.

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DO - 10.1039/d1cp00208b

M3 - Article

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AN - SCOPUS:85102407507

SN - 1463-9076

VL - 23

SP - 4624

EP - 4635

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

IS - 8

ER -

Mixing divalent ionic liquids: effects of charge and side-chains

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