Presentation Title

Developing X-ray Emission Spectroscopy for Quantifying NO Activation in Nickel Complexes

Start Date

November 2016

End Date

November 2016

Location

HUB 302-136

Type of Presentation

Poster

Abstract

Nitrous oxide (N2O) is a major concern for atmospheric health and its warming potential is 300 times more than carbon dioxide. Reducing the concentration of N2O is chemically challenging, however biological systems can reduce N2O through chemical reactions at copper centers within enzymes. How these organisms reduce N2O is not fully understood, so this project aims to explore activation modes relevant to the conversion of N2O to NO. We investigated how metal compounds interact with NO species through synthesis, X-ray emission spectroscopy (XES) and calculations. XES is sensitive to chemical environment, metal spin state and oxidation state, and can inform ligand identity, metal ligand bonding, and metal spin state of complicated metal complexes. While XES is a sensitive probe for the identification of metal-bound ligands and the quantification of small-molecule bond activation, the method is still being developed. We have used XES in combination with computational chemistry to understand chemical interactions between NO and nickel, and to quantify NO activation. This work aims to use XES to further explore the reduction of nitrous oxide, understand mechanisms for reducing pollutants, and develop new techniques for characterizing complex systems.

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Nov 12th, 1:00 PM Nov 12th, 2:00 PM

Developing X-ray Emission Spectroscopy for Quantifying NO Activation in Nickel Complexes

HUB 302-136

Nitrous oxide (N2O) is a major concern for atmospheric health and its warming potential is 300 times more than carbon dioxide. Reducing the concentration of N2O is chemically challenging, however biological systems can reduce N2O through chemical reactions at copper centers within enzymes. How these organisms reduce N2O is not fully understood, so this project aims to explore activation modes relevant to the conversion of N2O to NO. We investigated how metal compounds interact with NO species through synthesis, X-ray emission spectroscopy (XES) and calculations. XES is sensitive to chemical environment, metal spin state and oxidation state, and can inform ligand identity, metal ligand bonding, and metal spin state of complicated metal complexes. While XES is a sensitive probe for the identification of metal-bound ligands and the quantification of small-molecule bond activation, the method is still being developed. We have used XES in combination with computational chemistry to understand chemical interactions between NO and nickel, and to quantify NO activation. This work aims to use XES to further explore the reduction of nitrous oxide, understand mechanisms for reducing pollutants, and develop new techniques for characterizing complex systems.