Affiner les résultats

Type de document

Institution

Collection spécifique

Langue

  • Anglais (2) désactiver le filtre

Auteur

Mot clé

    Université de Fribourg

    Towards polymers with molecular auxeticity

    Alizadeh, Mahshid ; Tennie, Iris K. ; Steiner, Ullrich ; Kilbinger, Andreas F. M.

    In: CHIMIA International Journal for Chemistry, 2019, vol. 73, no. 1, p. 25–28

    For many decades, it has been challenging to synthesize auxetic materials at the molecular level. Auxetic materials exhibit counterintuitive behavior; they expand perpendicularly to the direction in which they are stretched. An aromatic macrocycle containing a sequence of N-substituted and N-unsubstituted amides was designed to resemble the re-entrant structure found in macromolecular auxetic...

    Université de Fribourg

    Catalytic living ring-opening metathesis polymerization with Grubbs’ second- and third-generation catalysts

    Yasir, Mohammad ; Liu, Peng ; Tennie, Iris K. ; Kilbinger, Andreas F. M.

    In: Nature Chemistry, 2019, vol. 11, no. 5, p. 488–494

    In a conventional living ring-opening metathesis polymerization (ROMP), an equal number of ruthenium complexes to the number of polymer chains synthesized are required. This can lead to high loadings of ruthenium complexes when aiming for shorter polymers. Here, a reversible chain-transfer agent was used to produce living ROMP polymers from norbornene derivatives using catalytic amounts of...