Surface functionalization with redox active molecule-based imidazolium via click chemistry

In this study, the redox active molecule N-ferrocenylmethyl-N-propargylimidazolium bromide was immobilized onto the surface of an electrode. The surface modification was performed by coupling the electrochemical reduction of the 4-azidophenyldiazonium generated in situ with a copper(I) catalyzed click chemistry reaction. Surface and electrochemical investigations suggest the attachment of a monolayer of redox active molecules containing an ionic liquid framework onto the electrode surface. Furthermore, scanning electrochemical microscopy studies revealed the conductive behavior of the attached ferrocenyl moieties on the ITO surface.