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Physical properties and nanostructuring of long-chained homobaric imidazolium ionic liquids

DOI: 10.1039/D2CP05783B DOI Help

Authors: Spyridon Koutsoukos (Imperial College London) , Jocasta Avila (CNRS and Université de Lyon) , Nicholas J. Brooks (Imperial College London) , Margarida Costa Gomes (CNRS and Université de Lyon) , Tom Welton (Imperial College London)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Chemistry Chemical Physics , VOL 23

State: Published (Approved)
Published: February 2023
Diamond Proposal Number(s): 29165

Open Access Open Access

Abstract: Understanding the structure–property relationship and nanoscopic behaviour of ionic liquids is of utmost importance for their potential applications. Focusing these studies on sets of homobaric ionic liquids could provide important insight into the effects of specific chemical groups on the overall interaction profile, bringing researchers one step closer to succesfully designing ionic liquids which are tailor-made for specific applications. This work focuses on ionic liquids with 12 total carbons on their side chains, studying both their bulk physical properties (such as densities and viscosities) and their nanostructuring. The results reveal that by keeping the total number of carbons constant, but arranging them differently around the imidazolium ring, either in a linear or in a branched-chain formation, can result in compounds with quite distinct properties. Some of those (such as diffusivity) appear to be more sensitive to symmetry variations, while others (such as density) are not significantly affected. X-ray scattering is used in order to get a clearer understanding of the nanostructuring of the studied compounds and to investigate to what extent the observed macroscopic properties are directly linked to the nanoscale ordering.

Subject Areas: Chemistry

Instruments: I22-Small angle scattering & Diffraction

Added On: 16/02/2023 08:41


Discipline Tags:

Physical Chemistry Chemistry

Technical Tags:

Scattering Small Angle X-ray Scattering (SAXS) Wide Angle X-ray Scattering (WAXS)