Patent ID: 8841465

Claim:
A process for the selective functionalization of metallic single-walled carbon nanotubes, wherein at pH<5: an aqueous dispersion comprising a mixture of metallic single-walled carbon nanotubes and of semiconducting single-walled carbon nanotubes and a cationic surfactant is reacted, with an ascorbic (Z)-diazoester of formula (I): in which: R 5 is an R 1 —N═N— group; R 1 represents a C 6-10 aryl group or a pyridyl group, said aryl and pyridyl groups optionally being substituted by one or more substituents chosen from a halogen atom chosen from chlorine or bromine, —NO 2 , —CO 2 H, —CO 2 R 3 , —R 3 or —OR 3 ; R 6 , R 2 , and R 4 are a hydrogen atom R 3 is a C 1-20 alkyl group or a halo(C 1-20 alkyl) group.