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Poly(ethylene glycol)-Based Ionic Liquids: Properties and Uses as Alternative Solvents in Organic Synthesis and Catalysis

Authors

  • Martina Maya Cecchini,

    1. Institut des Biomolécules Max Mousseron (IBMM), UMR 5247 CNRS—UM I-UM II, Université Montpellier II, Place E. Bataillon, 34095 Montpellier Cedex 5 (France)
    2. Dipartimento di Scienze Fisiche e Chimiche Università dell'Aquila e Consorzio INCA, Via Vetoio, Coppito, 67100 L'Aquila (Italy)
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  • Dr. Clarence Charnay,

    Corresponding author
    1. Institut Charles Gerhardt Montpellier (ICGM), Equipe CMOS, CNRS UMR 5253, Université Montpellier II, Place E. Bataillon, 34095 Montpellier Cedex 5 (France)
    • Clarence Charnay, Institut Charles Gerhardt Montpellier (ICGM), Equipe CMOS, CNRS UMR 5253, Université Montpellier II, Place E. Bataillon, 34095 Montpellier Cedex 5 (France)

      Evelina Colacino, Institut des Biomolécules Max Mousseron (IBMM), UMR 5247 CNRS—UM I-UM II, Université Montpellier II, Place E. Bataillon, 34095 Montpellier Cedex 5 (France)

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  • Prof. Francesco De Angelis,

    1. Dipartimento di Scienze Fisiche e Chimiche Università dell'Aquila e Consorzio INCA, Via Vetoio, Coppito, 67100 L'Aquila (Italy)
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  • Dr. Frédéric Lamaty,

    1. Institut des Biomolécules Max Mousseron (IBMM), UMR 5247 CNRS—UM I-UM II, Université Montpellier II, Place E. Bataillon, 34095 Montpellier Cedex 5 (France)
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  • Prof. Jean Martinez,

    1. Institut des Biomolécules Max Mousseron (IBMM), UMR 5247 CNRS—UM I-UM II, Université Montpellier II, Place E. Bataillon, 34095 Montpellier Cedex 5 (France)
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  • Dr. Evelina Colacino

    Corresponding author
    1. Institut des Biomolécules Max Mousseron (IBMM), UMR 5247 CNRS—UM I-UM II, Université Montpellier II, Place E. Bataillon, 34095 Montpellier Cedex 5 (France)
    • Clarence Charnay, Institut Charles Gerhardt Montpellier (ICGM), Equipe CMOS, CNRS UMR 5253, Université Montpellier II, Place E. Bataillon, 34095 Montpellier Cedex 5 (France)

      Evelina Colacino, Institut des Biomolécules Max Mousseron (IBMM), UMR 5247 CNRS—UM I-UM II, Université Montpellier II, Place E. Bataillon, 34095 Montpellier Cedex 5 (France)

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Abstract

PEG-based ionic liquids are a new appealing group of solvents making the link between two distinct but very similar fluids: ionic liquids and poly(ethylene glycol)s. They find applications across a range of innumerable disciplines in science, technology, and engineering. In the last years, the possibility to use these as alternative solvents for organic synthesis and catalysis has been increasingly explored. This Review highlights strategies for their synthesis, their physical properties (critical point, glass transition temperature, density, rheological properties), and their application in reactions catalyzed by metals (such as Pd, Cu, W, or Rh) or as organic solvent (for example for multicomponent reactions, organocatalysis, CO2 transformation) with special emphasis on their toxicity, environmental impact, and biodegradability. These aspects, very often neglected, need to be considered in addition to the green criteria usually considered to establish ecofriendly processes.

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