Presentation Title

Synthesis and Characterization of Nickel Nitrosyl Complexes with Bidentate N-heterocyclic Carbene Ligands

Faculty Mentor

S. Chantal E. Stieber

Start Date

18-11-2017 12:30 PM

End Date

18-11-2017 1:30 PM

Location

BSC-Ursa Minor 55

Session

Poster 2

Type of Presentation

Poster

Subject Area

biological_agricultural_sciences

Abstract

Synthesis and Characterization of Nickel Nitrosyl Complexes with Bidentate N-heterocyclic Carbene Ligands

Zijie Zhang

Faculty mentor: S. Chantal E. Stieber, Chemistry & Biochemistry

Abstract

Global warming is of great concern because the level of greenhouse gases is continuously increasing. Nitrous oxide (N2O), is a greenhouse gas which mainly comes from human activities such as fossil fuel combustion and industrial processes. N2O has a significant impact on the environment because it has a warming potential up to 310 times that of carbon dioxide. Additionally, nitrous oxide can damage the ozone layer, which is the Earth’s protection from the sun and UV radiation. Soil micro-organisms such as Geobacillus stearothermophilus are capable of reducing N2O and transforming it into N2, which is 78% of the air we breathe, but the mechanism is unknown. With an interest in developing methods to reduce N2O and understand the enzyme mechanism, smaller model compounds can be studied. How N-O interacts with nickel complexes was investigated to study possible oxidation and reduction mechanisms and develop methods to mitigate N2O through new chemistry. Nickel(0) complexes with bidentate N-heterocyclic carbene ligands were synthesized. Following the addition of NOBF4, synthesis of new, formally nickel(I) cations was achieved. Characterization by infrared spectroscopy confirmed the presence of a new Ni-NO bond and a BF41- counterion. Future extensions may include oxidation, reduction or synthesis of N2O and N2 complexes to understand how N2O can be converted to N2.

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Nov 18th, 12:30 PM Nov 18th, 1:30 PM

Synthesis and Characterization of Nickel Nitrosyl Complexes with Bidentate N-heterocyclic Carbene Ligands

BSC-Ursa Minor 55

Synthesis and Characterization of Nickel Nitrosyl Complexes with Bidentate N-heterocyclic Carbene Ligands

Zijie Zhang

Faculty mentor: S. Chantal E. Stieber, Chemistry & Biochemistry

Abstract

Global warming is of great concern because the level of greenhouse gases is continuously increasing. Nitrous oxide (N2O), is a greenhouse gas which mainly comes from human activities such as fossil fuel combustion and industrial processes. N2O has a significant impact on the environment because it has a warming potential up to 310 times that of carbon dioxide. Additionally, nitrous oxide can damage the ozone layer, which is the Earth’s protection from the sun and UV radiation. Soil micro-organisms such as Geobacillus stearothermophilus are capable of reducing N2O and transforming it into N2, which is 78% of the air we breathe, but the mechanism is unknown. With an interest in developing methods to reduce N2O and understand the enzyme mechanism, smaller model compounds can be studied. How N-O interacts with nickel complexes was investigated to study possible oxidation and reduction mechanisms and develop methods to mitigate N2O through new chemistry. Nickel(0) complexes with bidentate N-heterocyclic carbene ligands were synthesized. Following the addition of NOBF4, synthesis of new, formally nickel(I) cations was achieved. Characterization by infrared spectroscopy confirmed the presence of a new Ni-NO bond and a BF41- counterion. Future extensions may include oxidation, reduction or synthesis of N2O and N2 complexes to understand how N2O can be converted to N2.