Diazonium Functionalisation of Carbon Nanotubes for Specific Orientation of Multicopper Oxidases: Controlling Electron Entry Points and Oxygen Diffusion to the Enzyme.

We report the controlled orientation of bilirubin oxidases (BOD) from Myrothecium verrucaria on multiwalled carbon nanotubes (MWCNTs) functionalized by electrografting of 6-carboxynaphthalenediazonium and 4-(2-aminoethyl)benzenediazonium salts. On neg. charged naphthoate-modified MWCNTs, a high-potential (0.44 V vs. SCE) oxygen redn. electrocatalysis is obsd., occurring via the T1 copper center. On pos. charged ammonium-modified MWCNTs, a low-potential (0.15 V) oxygen redn. electrocatalysis is obsd., occurring through a partially oxidized state of the T2/T3 trinuclear copper cluster. Finally, chem. modified naphthoate MWCNTs exhibit high bioelectrocatalytic current densities of 3.9 mA cm-2 under air at gas-diffusion electrode. [on SciFinder(R)]

Références

Titre
Diazonium Functionalisation of Carbon Nanotubes for Specific Orientation of Multicopper Oxidases: Controlling Electron Entry Points and Oxygen Diffusion to the Enzyme.
Type de publication
Article de revue
Année de publication
2016
Revue
Chem. - A Eur. J.
Volume
22
Pagination
10494–10500
ISSN
0947-6539
Soumis le 12 avril 2018