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HYDROGEN ATOM QUANTUM DIFFUSION-LIMITED REACTION KINETICS OF H + CO → HCO IN SOLID PARAHYDROGEN: UNEXPECTED RESULTS
Muddasser, Ibrahim
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https://hdl.handle.net/2142/122375
Description
- Title
- HYDROGEN ATOM QUANTUM DIFFUSION-LIMITED REACTION KINETICS OF H + CO → HCO IN SOLID PARAHYDROGEN: UNEXPECTED RESULTS
- Author(s)
- Muddasser, Ibrahim
- Contributor(s)
- Anderson, David T.
- McDonald, Erin
- Nguyen, Anh H. M.
- Issue Date
- 2023-06-21
- Keyword(s)
- Dynamics and kinetics
- Abstract
- Our group recently showed that the rate constant for the diffusion-limited H + N₂O reaction in solid parahydrogen (pH₂) is inversely related to the N₂O concentration.ᵃ This finding was rationalized by the idea that chemical impurities disrupt the long-range order of the crystal and slow the H-atom quantum diffusion rate. We investigated this finding further by studying the H + CO → HCO reaction in solid pH₂. To explore how the reaction rate constant depends on the CO concentration, we prepared solid pH₂ matrix samples co-doped with CO and Cl₂ using the Rapid Vapor Deposition technique,ᵇ H-atoms are produced in situ using a UV-IR method described previously.ᶜ We performed kinetic studies at 1.56(3) and 4.00(2)K with a range of CO concentrations (10 − 250 ppm). We observe a similar inverse relationship between the rate constant and the CO concentration. Furthermore, it looks like the rate constant decreases from 1.56(3) to 4.00(2)K. This work is ongoing, and the latest results and analysis will be presented at the meeting.
- Publisher
- International Symposium on Molecular Spectroscopy
- Type of Resource
- Text
- Genre of Resource
- Conference Paper / Presentation
- Language
- eng
- Handle URL
- https://hdl.handle.net/2142/122375
- DOI
- https://doi.org/10.15278/isms.2023.6926
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