Sorbent comprising on its surface an aromatic ring system having an anionic or deprotonizable group for the purification of organic molecules

A sorbent comprising a solid support material, wherein the surface of the solid support material comprises a residue of the following general formula (I):

• wherein the residue is attached via a covalent single bond represented by the dotted line in formula (I) to a functional group on the surface of either the bulk solid support material itself or a polymer film on the surface of the solid support material;
• and wherein
• (a) L is (q+1)-valent linear aliphatic hydrocarbon group comprising 1 to 20 carbon atoms, or a branched or cyclic aliphatic hydrocarbon group comprising 3 to 20 carbon atoms, wherein:
• (i) one or more CH2-moieties in said groups are substituted by CO,
• (ii) one or more CH2-moieties in said groups may be substituted by a NH, O or S,
• (iii) one or more CH-moieties in said groups may be substituted by N,
• (iv) said groups may comprise one or more double bonds between two carbon atoms, and
• (v) one or more hydrogen atoms may be substituted by D, F, Cl or OH;
• (b) Ar represents independently at each occurrence a (p+1)-valent mono- or polycyclic aromatic ring system comprising 6 to 28 aromatic ring atoms, or a (p+1)-valent mono- or polycyclic heteroaromatic ring system comprising 5 to 28 aromatic ring atoms, wherein one or more hydrogen atoms may be substituted by a residue R1;
• (c) Ps represents independently at each occurrence either a deprotonizable group or an anionic group;
• (d) R1 is selected from the group consisting of C1-6-alkoxy, D, F, Cl, Br, —CN, —NC, —NO2, —C1-6-alkyl esters of carboxylic acid, —C1-6-alkyl esters of phosphoric acid and —C1-6-alkyl esters of boronic acid;
• (e) p is 1, 2 or 3;
• and
• (f) q is 1 or 2.