Dear Petr;

I think the same procedure used in ATRP may be used. There exist a variety of procedure available including the use of a complexing agent in acetone (Cu complexes are generally unsoluble in acetone). Regards

Dear Abdelkader,

Thank you very much for the advice.

Best,

Petr

You could also try the method described here: "Cu Elimination from Cu-Coordinating Macromolecules", MF Ebbesen, D Itskalov, M Baier, L Hartmann, ACS Macro Letters 6 (4), 399-403