Method for selective functionalization of single-walled carbon nanotubes

摘要

The present invention relates to a method for selective functionalization of metallic single-walled carbon nanotubes with a diazonium derivative. The present invention also relates to the use of the mixture of metallic single-walled carbon nanotubes selectively functionalized and to the semiconducting single-walled carbon nanotubes obtained by means of the method according to the invention, for producing transistor channels in particular in electronics, electron acceptor materials, in particular in photovoltaic systems, nonlinear infrared photon emitters or absorbers, current-conducting electrodes, flexible transparent electrodes, antistatic coatings, chemical detectors, and solar cells.

主权项

1. 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:
R5 is an R1—N═N— group; R1 represents a C6-10 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, —NO2, —CO2H, —CO2R3, —R3 or —OR3; R6, R2, and R4 are a hydrogen atom R3 is a C1-20 alkyl group or a halo(C1-20 alkyl) group.