Université de Fribourg

Kinetics of ion transport through supramolecular channels in single crystals

Assouma, Cyrille D. ; Crochet, Aurélien ; Chérémond, Yvens ; Giese, Bernd ; Fromm, Katharina M.

In: Angewandte Chemie International Edition, 2013, vol. 52, no. 17, p. 4682–4685

Single-crystal to single-crystal transformations are possible by ion-exchange and transport reactions through supramolecular channels that are composed of crown ether molecules and use trihalide ions as scaffolds. Kinetic measurements of ion transport at different temperatures provide activation energy data and show that a very fast.

Université de Fribourg

Di-Benzo-18-Crown-6 and its Derivatives as Ligands in the Search for Ion Channels

Fromm, Katharina M. ; Bergougnant, Rémi D. ; Robin, Adeline Y.

In: Zeitschrift für anorganische und allgemeine Chemie, 2006, vol. 632, no. 5, p. 828 - 836

Université de Fribourg

Transport properties of solid state crown ether channel systems

Fromm, Katharina M. ; Bergougnant, Rémi D.

In: Solid State Sciences, 2007, vol. 9, no. 7, p. 580-587

Single crystals of [(H₂O)⊂(DB18C6)(μ₂-H₂O)2/2][(H₃O)⊂(DB18C6)(μ₂-H₂O)2/2]I₃ 1 were shown to possess ideally stacked crown ether molecules which form channels running in one direction through the solid state structure. By immersion of single crystals of 1 into NaOH, ion exchange takes place to yield the compound...