The planet’s nitrogen biogeochemical cycle and human health has been dramatically impacted by anthropogenic nitrogen loadings into the environment. The nitrogen cycle is regulated by a ubiquitous set of microorganisms’ employing a vast array of enzymes, many of which contain iron porphyrin systems. Many of these enzymatic pathways and mechanisms are not thoroughly understood nor have they been fully elucidated. This research contrasted the biomimetic reactions of various nitrogen oxide species (NOx) with iron (III) porphyrins and iron (IV) corroles. This investigation employed phenyl and pentafluorophenyl Fe centered meso substituted porphyrins and corroles insitu reactions under argon with a series of NOx species; Nitrate ion (NO3-), nitrite ion (NO2-), nitronium ion (NO2+), nitrosonium ion (NO+), and nitric oxide (NO). The progress of the in-situ reactions and reaction products were characterized by UV-vis, NMR, IR, and GC/MS. A series of proposed mechanisms are postulated for each of these interactions and the extent to which higher Fe (IV) oxidation state impacts stoichiometric product formation.

Contrasting the biomimetic reactions of NOx with Fe (III) porphyrins and Fe (IV) corroles

249th National Meeting (2015)

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