Disproportionation of Nitric Oxide at a Surface-Bound Nickel Porphyrinoid.

ABSTRACT: Uncommon metal oxidation states in porphyrinoid cofactors are responsible for the activity of many enzymes. The F₄₃₀ and P450nor co-factors, with their reduced Ni^I- and Fe^III-containing tetrapyrrolic cores, are prototypical examples of biological systems involved in methane formation and in the reduction of nitric oxide, respectively. Herein, using a comprehensive range of experimental and theoretical methods, we raise evidence that nickel tetraphenyl porphyrins deposited in vacuo on a copper surface are reactive towards nitric oxide disproportionation at room temperature. The interpretation of the measurements is far from being straightforward due to the high reactivity of the different nitrogen oxides species (eventually present in the residual gas backgr

SUBMITTER: Stredansky M 

PROVIDER: S-EPMC10947138 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature