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Issue 27, 2018
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X-Ray scattering and physicochemical studies of trialkylamine/carboxylic acid mixtures: nanoscale structure in pseudoprotic ionic liquids and related solutions

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Abstract

We report the results of X-ray scattering, physical, and spectroscopic measurements on a series of water-saturated trialkylamine/carboxylic acid mixtures. The results demonstrate the existence of well-defined nanoscale structures in bulk liquid mixtures at specific acid : amine ratios. These structures are analogous to those observed in ionic liquids but are driven by the formation of a hydrogen-bonded network rather than via inter-ion Coulomb forces. The results of the physical components of this study are closely analogous to prior observations on anhydrous, low molecular weight acid/amine mixtures, but this is to our knowledge the first time these observations have been augmented by the use of X-ray scattering. The results therefore bridge the gap between early work on amine/acid mixtures and recent studies of protic and pseudoprotic ionic liquids.

Graphical abstract: X-Ray scattering and physicochemical studies of trialkylamine/carboxylic acid mixtures: nanoscale structure in pseudoprotic ionic liquids and related solutions

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Publication details

The article was received on 04 May 2018, accepted on 23 Jun 2018 and first published on 25 Jun 2018


Article type: Paper
DOI: 10.1039/C8CP02854K
Citation: Phys. Chem. Chem. Phys., 2018,20, 18639-18646
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    X-Ray scattering and physicochemical studies of trialkylamine/carboxylic acid mixtures: nanoscale structure in pseudoprotic ionic liquids and related solutions

    M. N. Kobrak and K. G. Yager, Phys. Chem. Chem. Phys., 2018, 20, 18639
    DOI: 10.1039/C8CP02854K

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