Immobilization of fullerene C60 at cathodically polarized glassy carbon for generation of thin nucleophilic layers and their carboxylation and alkylation.

Publication date: Available online 24 September 2019Source: CarbonAuthor(s): Jacques Simonet, Viatcheslav JouikovAbstractFullerene-C60 deposited onto solid substrates (glassy carbon, gold) was polarized between 0 V and -2 V vs. Ag/AgCl/KClsat (aq) in polar aprotic solvents (dimethylformamide or acetonitrile) containing tetramethylammonium salts in the presence of electrophilic reagents, namely primary haloalkanes (Hal = Br, I) and carbon dioxide. The electrogenerated reduced forms of C60 (C60- to C604-, fullerene polyanions), show high reactivity towards various electrophiles which permits preparing C60 dicarboxylates whose formation was established through coulometric integration. Importantly, anodic oxidation (Ep ≈ +1 V) of thus produced C60 dicarboxylates led to the complete regeneration of C60 via a Kolbe bis-decarboxylation.Graphical abstract
Source: Carbon - Category: Materials Science Source Type: research