Influence of Anion Species on Liquid–Liquid Phase Separation in [EMIm<sup>+</sup>][X<sup>–</sup>]/Benzene Mixtures

Tang, Chenyu; Saielli, Giacomo; Wang, Yanting

doi:10.1021/acs.jpcb.3c06205

J. Phys. Chem. B

2023

DOI: 10.1021/acs.jpcb.3c06205

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Influence of Anion Species on Liquid–Liquid Phase Separation in [EMIm⁺][X^–]/Benzene Mixtures

Chenyu Tang,

Giacomo Saielli,

Yanting Wang

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2024

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Simulating the ionic liquid mixing with organic-solvent clarifies the mixture’s SFG spectral behavior and the specific surface region originating SFG

Sakhtemanian,

Duwadi,

Baldelli

et al. 2024

Sci Rep

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Molecular dynamics (MD) simulation of the green ionic liquid [C₄mim][PF₆] mixed with polar benzonitrile (BNZ) solvent provides detailed insights into their structural and dynamic properties, essential for electrochemistry and materials science applications. The simulations we carried out at varying mole fractions ( X BZN ) reveal the mixtures’ physical, structural, and dynamic properties, with radial, spatial, and combined distribution functions, highlighting the effective interaction through H-bonding involved. The simulation indicates that BZN stacks on the cation butyl tail, providing a significant explanation for the unique experimental observations (following). Adding BZN causes the mixture’s liquid dynamics to increase linearly at low X BZN and exponentially at high X BZN , with a notable singular transition at 0.5 X BZN . Comprehensive efforts were made to verify and support experimental sum frequency generation (SFG) spectroscopy by simulating the surface structure of the mixtures. Consequently, the simulated BZN stacking structure explains (1) the absence of the C≡N vibrational mode in the SFG spectrum for X BZN < 0.8, and (2) the gradual diminishing of the CH 3 SFG signal, which disappears as X BZN approaches 0.5. Finally, this research removes a persistent ambiguity, proving that only the molecular moieties on the surface generate the SFG vibrational signal, while those in the subsurface do not. Supplementary Information The online version contains supplementary material available at 10.1038/s41598-024-74561-8.

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Simulating the ionic liquid mixing with organic-solvent clarifies the mixture’s SFG spectral behavior and the specific surface region originating SFG

Sakhtemanian,

Duwadi,

Baldelli

et al. 2024

Sci Rep

View full text Add to dashboard Cite

show abstract

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Influence of Anion Species on Liquid–Liquid Phase Separation in [EMIm⁺][X^–]/Benzene Mixtures

Cited by 1 publication

References 50 publications

Simulating the ionic liquid mixing with organic-solvent clarifies the mixture’s SFG spectral behavior and the specific surface region originating SFG

Simulating the ionic liquid mixing with organic-solvent clarifies the mixture’s SFG spectral behavior and the specific surface region originating SFG

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Influence of Anion Species on Liquid–Liquid Phase Separation in [EMIm+][X–]/Benzene Mixtures

Cited by 1 publication

References 50 publications

Simulating the ionic liquid mixing with organic-solvent clarifies the mixture’s SFG spectral behavior and the specific surface region originating SFG

Simulating the ionic liquid mixing with organic-solvent clarifies the mixture’s SFG spectral behavior and the specific surface region originating SFG

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Influence of Anion Species on Liquid–Liquid Phase Separation in [EMIm⁺][X^–]/Benzene Mixtures