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Université de Fribourg

Enolesters as chain end-functionalizing agents for the living ring opening metathesis polymerization

Liu, Peng ; Yasir, Mohammad ; Kurzen, Helena ; Hanik, Nils ; Schäfer, Mark ; Kilbinger, Andreas F. M.

In: Journal of Polymer Science Part A: Polymer Chemistry, 2017, vol. 55, no. 18, p. 2983–2990

Functional enolethers have previously been used to introduce functional end groups at the chain end of ruthenium carbene complex initiated living ring opening metathesis polymers. Here, we investigated whether the weaker π-donating enolesters could equally be used in regio selective reactions with ruthenium carbene complexes and thus as polymer end-functionalization reagents. Enolesters such as...

Université de Fribourg

Electronic structure and magnetic properties of lanthanide 3+ cations

Kurzen, Helena ; Bovigny, Laura ; Bulloni, Claudio ; Daul, Claude

In: Chemical Physics Letters, 2013, vol. 574, p. 129–132

The magnetic properties of lanthanides are currently of great interest. Especially, the discovery that mononuclear complexes of rare earth (RE) ions can exhibit magnetic anisotropy and can act as single molecular magnets. Heretofore, the magnetic susceptibility of RE ions has often been estimated, using HUND’s empirical formula. In this work, we propose a non-empirical calculation of magnetic...