Multimodal adsorption medium with multimodal ligands, method for the preparation and use thereof

A multimodal adsorption medium having a functional surface, comprising a polymeric carrier material with polymeric spacer elements bound to the surface thereof, to which multimodal ligands of the following structure -G-(CO2H)n are covalently bonded via an —X—(C═O) group,

• where T denotes the polymeric carrier material with the polymeric spacer elements bound to the surface thereof,
• X denotes an —NH— moiety on the polymeric spacer element,
• the structure -G-(CO2H)n is selected from the group consisting of (3), (4), (6) to (14) and (15):
• and
• wherein the polymeric spacer elements are selected from the group consisting of polyallylamine, polyvinyladine, poly(4-aminostyrene), poly-L-lysine, poly(N-methylvinylamine), poly(N-methylallylamine) and poly(oleylamine).