On the thermodynamic and kinetic investigations of a [c2]daisy chain polymer

Mohamad Hmadeh, Lei Fang, Ali Trabolsi, Mourad Elhabiri, Anne Marie Albrecht-Gary, J. Fraser Stoddart

    Research output: Contribution to journalArticle

    Abstract

    We report a variety of [c2]daisy chain molecules which undergo quantitative, efficient, and fully reversible molecular movements upon the addition of base/acid in organic solvents. Such externally triggered molecular movements can induce the contraction and extension of the [c2]daisy chain molecule as a whole. A linear polymer of such a bistable [c2]daisy chain exerts similar types of movements and can be looked upon as a candidate for the development of artificial muscles. The spectrophotometric investigations of both the monomeric and polymeric bistable [c2]daisy chains, as well as the corresponding model compounds, were performed in MeCN at room temperature, in order to obtain the thermodynamic parameters for these mechanically interlocked molecules. Based on their spectrophotometric and thermodynamic characteristics, kinetic analysis of the acid/base-induced contraction and extension of the [c2]daisy chain monomer and polymer were conducted by employing a stopped-flow technique. These kinetic data suggest that the rates of contraction and extension for these [c2]daisy chain molecules are determined by the thermodynamic stabilities of the corresponding kinetic intermediates. Faster switching rates for both the contraction and extension processes of the polymeric [c2]daisy chain were observed when compared to those of its monomeric counterpart. These kinetic and thermodynamic investigations on [c2]daisy chain-based muscle-like compounds provide important information for those seeking an understanding of the mechanisms of actuation in mechanically interlocked macromolecules.

    Original languageEnglish (US)
    Pages (from-to)3422-3430
    Number of pages9
    JournalJournal of Materials Chemistry
    Volume20
    Issue number17
    DOIs
    StatePublished - Jun 8 2010

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    Polymers
    Thermodynamics
    Molecules
    Kinetics
    Muscle
    Acids
    Macromolecules
    Organic solvents
    Thermodynamic stability
    Monomers
    Temperature

    ASJC Scopus subject areas

    • Chemistry(all)
    • Materials Chemistry

    Cite this

    Hmadeh, M., Fang, L., Trabolsi, A., Elhabiri, M., Albrecht-Gary, A. M., & Stoddart, J. F. (2010). On the thermodynamic and kinetic investigations of a [c2]daisy chain polymer. Journal of Materials Chemistry, 20(17), 3422-3430. https://doi.org/10.1039/b924273b

    On the thermodynamic and kinetic investigations of a [c2]daisy chain polymer. / Hmadeh, Mohamad; Fang, Lei; Trabolsi, Ali; Elhabiri, Mourad; Albrecht-Gary, Anne Marie; Stoddart, J. Fraser.

    In: Journal of Materials Chemistry, Vol. 20, No. 17, 08.06.2010, p. 3422-3430.

    Research output: Contribution to journalArticle

    Hmadeh, M, Fang, L, Trabolsi, A, Elhabiri, M, Albrecht-Gary, AM & Stoddart, JF 2010, 'On the thermodynamic and kinetic investigations of a [c2]daisy chain polymer', Journal of Materials Chemistry, vol. 20, no. 17, pp. 3422-3430. https://doi.org/10.1039/b924273b
    Hmadeh M, Fang L, Trabolsi A, Elhabiri M, Albrecht-Gary AM, Stoddart JF. On the thermodynamic and kinetic investigations of a [c2]daisy chain polymer. Journal of Materials Chemistry. 2010 Jun 8;20(17):3422-3430. https://doi.org/10.1039/b924273b
    Hmadeh, Mohamad ; Fang, Lei ; Trabolsi, Ali ; Elhabiri, Mourad ; Albrecht-Gary, Anne Marie ; Stoddart, J. Fraser. / On the thermodynamic and kinetic investigations of a [c2]daisy chain polymer. In: Journal of Materials Chemistry. 2010 ; Vol. 20, No. 17. pp. 3422-3430.
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