Experimental Characterization of the Isomer-Selective Generation of the Astrochemically Relevant Hydroxymethylene Radical Cation (HCOH<SUP>•+</SUP>/DCOH<SUP>•+</SUP>)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F24%3A00600597" target="_blank" >RIV/61388955:_____/24:00600597 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0357905" target="_blank" >https://hdl.handle.net/11104/0357905</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpclett.4c02374" target="_blank" >10.1021/acs.jpclett.4c02374</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental Characterization of the Isomer-Selective Generation of the Astrochemically Relevant Hydroxymethylene Radical Cation (HCOH<SUP>•+</SUP>/DCOH<SUP>•+</SUP>)

Popis výsledku v původním jazyce

Interest in the observation and characterization of organic isomers in astronomical environments has grown rapidly with an increase in the sensitivity of detection techniques. Accurate modeling and interpretation of these environments require experimental isomer-specific reactivity and spectroscopic measurements. Given the abundance of formaldehyde (H2CO) in various astrophysical objects, the properties and reactivities of its cation isomers H2CO center dot+ and HCOH center dot+ are of significant interest. However, for the hydroxymethylene radical cation HCOH center dot+ (and its isotopologue DCOH center dot+), detailed reactivity studies have been limited by the lack of suitable experimental methods to generate this isomer with high purity. Here, potential approaches to the isomer-selective generation of HCOH center dot+ and DCOH center dot+ are characterized through differential reactivity measurements. While the dissociative photoionization of cyclopropanol (c-CH2CH2CHOH) is determined to be unsuitable, the dissociation of methanol-d(3) (CD3OH) allows for the formation of DCOH center dot+ with a fractional abundance of >99% at photon energies below 14.8 eV. These results will allow future spectroscopic and reactivity measurements of HCOH center dot+/DCOH center dot+ to be conducted, laying the groundwork for future detection and incorporation into models of the interstellar medium.

Název v anglickém jazyce

Experimental Characterization of the Isomer-Selective Generation of the Astrochemically Relevant Hydroxymethylene Radical Cation (HCOH<SUP>•+</SUP>/DCOH<SUP>•+</SUP>)

Popis výsledku anglicky

Interest in the observation and characterization of organic isomers in astronomical environments has grown rapidly with an increase in the sensitivity of detection techniques. Accurate modeling and interpretation of these environments require experimental isomer-specific reactivity and spectroscopic measurements. Given the abundance of formaldehyde (H2CO) in various astrophysical objects, the properties and reactivities of its cation isomers H2CO center dot+ and HCOH center dot+ are of significant interest. However, for the hydroxymethylene radical cation HCOH center dot+ (and its isotopologue DCOH center dot+), detailed reactivity studies have been limited by the lack of suitable experimental methods to generate this isomer with high purity. Here, potential approaches to the isomer-selective generation of HCOH center dot+ and DCOH center dot+ are characterized through differential reactivity measurements. While the dissociative photoionization of cyclopropanol (c-CH2CH2CHOH) is determined to be unsuitable, the dissociation of methanol-d(3) (CD3OH) allows for the formation of DCOH center dot+ with a fractional abundance of >99% at photon energies below 14.8 eV. These results will allow future spectroscopic and reactivity measurements of HCOH center dot+/DCOH center dot+ to be conducted, laying the groundwork for future detection and incorporation into models of the interstellar medium.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/LTC20062" target="_blank" >LTC20062: Reactivity of negative ions in the gas phase</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physical Chemistry Letters

ISSN

1948-7185

e-ISSN

—

Svazek periodika

15

Číslo periodika v rámci svazku

43

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

10888-10895

Kód UT WoS článku

001341497300001

EID výsledku v databázi Scopus

2-s2.0-85207721772