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Photocatalytic Deoxygenation of N–O Bonds with Rhenium Complexes: From the Reduction of Nitrous Oxide to Pyridine N-Oxides

Marianne Kjellberg 1 Alexia Ohleier 1 Pierre Thuéry 1 Emmanuel Nicolas 1 Lucile Anthore-Dalion 1 Thibault Cantat 1
1 LCMCE - Laboratoire de Chimie Moléculaire et de Catalyse pour l'Energie (ex LCCEF)
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
Abstract : The accumulation of nitrogen oxides in the environment calls for new pathways to interconvert the various oxidation states of nitrogen, and especially their reduction. The large spectrum of reduction potentials covered by nitrogen oxides makes it however difficult to find general systems capable of efficiently reducing various N-oxides. Here photocatalysis unlocks high energy species able to both circumvent the inherent low reactivity of the greenhouse gas and oxidant N2O (E°(N2O/N2) = +1.77 V vs. SHE), and reduce pyridine N-oxides (E1/2(pyridine N-oxide/pyridine) = –1.04 V vs. SHE). The rhenium complex [Re(4,4’-tBu-bpy)(CO)3Cl] proved to be efficient to perform both reactions under ambient conditions, enabling the deoxygenation of N2O as well as synthetically relevant and functionalized pyridine N-oxides.
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https://hal-cea.archives-ouvertes.fr/cea-03196623
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Submitted on : Tuesday, April 13, 2021 - 8:16:35 AM
Last modification on : Thursday, July 1, 2021 - 4:43:43 PM
Long-term archiving on: : Wednesday, July 14, 2021 - 6:11:22 PM

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Marianne Kjellberg, Alexia Ohleier, Pierre Thuéry, Emmanuel Nicolas, Lucile Anthore-Dalion, et al.. Photocatalytic Deoxygenation of N–O Bonds with Rhenium Complexes: From the Reduction of Nitrous Oxide to Pyridine N-Oxides. 2021. ⟨cea-03196623⟩

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