Ricerc@Sapienza

The establishment of a polythiophene-supported electron transfer of PQQ-dependent glucose dehydrogenase (PQQ-GDH) at multiwalled carbon nanotubes is reported. For this purpose, thiol-functionalized MWCNTs are deposited on a gold electrode, which is further modified by on-top electropolymerization of different thiophene monomers. The enzyme is covalently bound to such an electrode by activating the carboxy groups of the polymer.

Microbial electrosynthesis (MES) is an emerging technology which exploits microbial cells to convert CO2 into fuels, and value-added chemicals using electrons supplied by a solid-state cathode. Methane and acetic acid are typically the main CO2-reduction products attained in microbial electrosynthesis studies, although the production of other more valuable products has also been reported.

A kinetic study of the hydrogen atom transfer (HAT) reactions from a series of organic compounds to the quinolinimide-N-oxyl radical (QINO) has been carried out in CH3CN. The HAT rate constants are significantly higher than those observed with the phthalimide-N-oxyl radical (PINO) as a result of enthalpic and polar effects due to the presence of the N-heteroaromatic ring in QINO.

The oxidation of a series of aryl 1-methyl-1-phenylethyl sulfides with H2O2catalyzed by the two tetradentate nonheme-iron complexes [(PDP)FeII(SbF6)2] and [(BPMCN)FeII(OTf)2] occurs by an electron transfer-oxygen transfer (ET/OT) mechanism as supported by the observation of products deriving from fragmentation of the corresponding radical cations in association with S-oxidation products (sulfoxides). © 2017 Taylor & Francis Group, LLC.