Electrochemical functionalization at anodic conditions of multi-walled carbon nanotubes with chlorodiphenylphosphine
Quintero-Jaime, Andrés Felipe | Ghisolfi, Alessio | Cazorla-Amorós, Diego | Morallon, Emilia | Cazorla-Amorós, Diego | Morallon, Emilia | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales | Electrocatálisis y Electroquímica de Polímeros | Materiales Carbonosos y Medio Ambiente
Covalent functionalization of multi-walled carbon nanotubes (MWCNTs) and oxidized MWCNTs (o-MWCNTs) with chlorodiphenylphosphine (Ph2PCl) has been studied by cyclic voltammetry in organic medium. Depending the upper potential limit used in the electrochemical functionalization, different amount of phosphorus incorporation n is obtained, as result of the formation of radical species during the electrochemical oxidation of the Ph2PCl. The electrochemical oxidation of Ph2PCl promotes the covalent attachment of diphenylphosphine-like structure on the carbon nanotube surface. At the same time, the incorporation of Cl on the carbon nanotubes is observed during the functionalization. Furthermore, the presence of oxygen surface groups on the MWCNTs provides a favorable attachment of the Ph2P ∙ + species, which has promoted preferentially the formation of C-P bonds, whereas the amount of Cl is reduced.
Показать больше [+] Меньше [-]The authors would like to thank MINCIN (PID2019-105923RB-I00) for the financial support.
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