Decomposition of HCN during Experimental Impacts in Dry and Wet Planetary Atmospheres
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F24%3A00586720" target="_blank" >RIV/61388955:_____/24:00586720 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/24:10484594
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acsearthspacechem.4c00064" target="_blank" >https://pubs.acs.org/doi/10.1021/acsearthspacechem.4c00064</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acsearthspacechem.4c00064" target="_blank" >10.1021/acsearthspacechem.4c00064</a>
Alternative languages
Result language
angličtina
Original language name
Decomposition of HCN during Experimental Impacts in Dry and Wet Planetary Atmospheres
Original language description
Hydrogen cyanide (HCN), a key molecule of significant importance in contemporary perspectives on prebiotic chemistry, originates in planetary atmospheres from various processes, such as photochemistry, thermochemistry, and impact chemistry, as well as from delivery by impacts. The resilience of HCN during periods of heavy bombardment, a phenomenon caused by an influx of material on unstable trajectories after accretion, remains relatively understudied. This study extensively investigates the stability of HCN under impact conditions simulated using a laboratory Nd:YAG laser in the ELISE experimental setup. High-resolution infrared spectroscopy was employed to monitor the gas phase composition during these simulations. Impact chemistry was simulated in bulk nitrogen atmospheres with varying mixing ratios of HCN and water vapor. The probed range of compositions spans from similar to 0 to 1.8% of HCN and 0 to 2.7% of H2O in a similar to 1 bar nitrogen atmosphere. The primary decomposition products of HCN are CO and CO2 in the presence of water and unidentified solid phase products in dry conditions. Our experiments revealed a range of initial HCN decomposition rates between 2.43 x 10(15) and 5.17 x 10(17) molec J(-1) of input energy depending on the initial composition. Notably, it is shown that the decomposition process induced by the laser spark simulating the impact plasma is nonlinear, with the duration of the irradiation markedly affecting the decomposition rate. These findings underscore the necessity for careful consideration and allowance for margins when applying these rates to chemical models of molecular synthesis and decomposition in planetary atmospheres.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS Earth and Space Chemistry
ISSN
2472-3452
e-ISSN
2472-3452
Volume of the periodical
8
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
13
Pages from-to
1246-1258
UT code for WoS article
001231811600001
EID of the result in the Scopus database
2-s2.0-85194234793