Sorbent comprising on its surface an aliphatic unit 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):

• L-X 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 represents a covalent single bond or is a bivalent unit selected from the group consisting of —C(O)—, —S(O)2—, —CH2CH(OH)— and —C(O)NH—;
• (b) X represents a monovalent linear aliphatic hydrocarbon group comprising 1 to 30 carbon atoms, or a branched or cyclic aliphatic hydrocarbon group comprising 3 to 30 carbon atoms, wherein:
• (i) one or more CH2-moieties in said groups may be substituted by O, S, —S(O)2—, —C(O)NH— or —C(S)NH—;
• (ii) one or more hydrogen atoms may be substituted by F, Cl, Br, —CN or —NC;
• and
• (iii) said groups may comprise one or more double bonds between two carbon atoms.