{"title":"Exploring the Role of Ion–Molecule Reactions on Interstellar Icy Grain Surfaces","authors":"Weikai Cui*, and , Eric Herbst*, ","doi":"10.1021/acsearthspacechem.4c0019410.1021/acsearthspacechem.4c00194","DOIUrl":null,"url":null,"abstract":"<p >The synthesis of organic molecules in the interstellar medium involves various gas-phase and surface reactions, with dust-grain surfaces playing a particularly crucial catalytic role. While ion-neutral gas-phase reactions and surface reactions are relatively well modeled and documented in databases, the interactions between gaseous ions and neutral species on granular surfaces are less understood. Recent theories propose that ion–molecule reactions on icy interstellar grains could offer efficient and barrierless pathways for the formation of complex organic molecule intermediates. This area remains underexplored in astrochemistry, highlighting the need for standardized modeling and data handling. Our study introduces an Eley–Rideal reaction model, focusing on reactions between gas-phase ions such as C<sup>+</sup> and HCO<sup>+</sup> and water ice on grain surfaces within a gas–grain model of cold interstellar clouds. The evolution of the model, including ion–molecule surface reactions, was studied via a three-phase gas–grain chemical network.</p>","PeriodicalId":15,"journal":{"name":"ACS Earth and Space Chemistry","volume":"8 11","pages":"2218–2231 2218–2231"},"PeriodicalIF":2.9000,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsearthspacechem.4c00194","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Earth and Space Chemistry","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsearthspacechem.4c00194","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The synthesis of organic molecules in the interstellar medium involves various gas-phase and surface reactions, with dust-grain surfaces playing a particularly crucial catalytic role. While ion-neutral gas-phase reactions and surface reactions are relatively well modeled and documented in databases, the interactions between gaseous ions and neutral species on granular surfaces are less understood. Recent theories propose that ion–molecule reactions on icy interstellar grains could offer efficient and barrierless pathways for the formation of complex organic molecule intermediates. This area remains underexplored in astrochemistry, highlighting the need for standardized modeling and data handling. Our study introduces an Eley–Rideal reaction model, focusing on reactions between gas-phase ions such as C+ and HCO+ and water ice on grain surfaces within a gas–grain model of cold interstellar clouds. The evolution of the model, including ion–molecule surface reactions, was studied via a three-phase gas–grain chemical network.
期刊介绍：
The scope of ACS Earth and Space Chemistry includes the application of analytical, experimental and theoretical chemistry to investigate research questions relevant to the Earth and Space. The journal encompasses the highly interdisciplinary nature of research in this area, while emphasizing chemistry and chemical research tools as the unifying theme. The journal publishes broadly in the domains of high- and low-temperature geochemistry, atmospheric chemistry, marine chemistry, planetary chemistry, astrochemistry, and analytical geochemistry. ACS Earth and Space Chemistry publishes Articles, Letters, Reviews, and Features to provide flexible formats to readily communicate all aspects of research in these fields.
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