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Issue 4, 2018
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Lipophilic polyelectrolyte gel derived from phosphonium borate can absorb a wide range of organic solvents

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Abstract

Herein, we demonstrate a polyelectrolyte gel which can absorb a wide range of organic solvents from dimethylsulfoxide (DMSO, permittivity: ε = 47.0) to tetrahydrofuran (ε = 5.6). The gel consists of polystyrene chains with small amounts (∼5 mol%) of lipophilic electrolytes derived from triphenylphosphonium tetraaryl borate. The swelling ability of the polyelectrolyte gel was higher than that of the alkyl ammonium tetraaryl borate previously reported by us, and this is attributed to the higher compatibility with organic solvents, as well as the higher dissociating ability, of the triphenyl phosphonium salt. The role of the ionic moieties was additionally confirmed by post modification of the polyelectrolyte gel via a conventional Wittig reaction, resulting in a nonionic gel. Our findings introduced here will lead to a clear-cut molecular design for polyelectrolyte gels which absorb all solvents.

Graphical abstract: Lipophilic polyelectrolyte gel derived from phosphonium borate can absorb a wide range of organic solvents

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Publication details

The article was received on 13 Sep 2017, accepted on 07 Dec 2017 and first published on 07 Dec 2017


Article type: Paper
DOI: 10.1039/C7SM01841J
Citation: Soft Matter, 2018,14, 581-585
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    Lipophilic polyelectrolyte gel derived from phosphonium borate can absorb a wide range of organic solvents

    S. Sunaga, K. Kokado and K. Sada, Soft Matter, 2018, 14, 581
    DOI: 10.1039/C7SM01841J

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