Hydrated Formic Acid Clusters and their Interaction with Electrons

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F24%3A00584315" target="_blank" >RIV/61388955:_____/24:00584315 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0352245" target="_blank" >https://hdl.handle.net/11104/0352245</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/cphc.202400071" target="_blank" >10.1002/cphc.202400071</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hydrated Formic Acid Clusters and their Interaction with Electrons

Popis výsledku v původním jazyce

We investigate ion formation in hydrated formic acid (FA) clusters upon collision with electrons of variable energy, focusing on electron ionization at 70 eV (EI) and low-energy (1.5–15 eV) electron attachment (EA). To uncover details about the composition of neutral clusters, we aim to elucidate the ion formation processes in FAM ⋅ WN clusters initiated by interaction with electrons and determine the extent of cluster fragmentation. EI predominantly produces protonated [FAm+H]+ ions, and in FA-rich clusters, the stable ring structures surrounding H3O+ ions are formed. In contrast, EA leads to a competition between the formation of intact [FAm ⋅ Wn]− and dissociated [FAm ⋅ Wn−H]− fragment ions, influenced by the cluster size, level of hydration, and electron energy. Our findings reveal a predisposition of low-energy EA towards forming [FAm ⋅ Wn]−, while higher electron energies tend to favor the formation of [FAm ⋅ Wn−H]− due to intracluster ion-molecule reactions. The comparison of positive and negative ion spectra suggests that the mass spectra of FA-rich clusters may indicate their actual size and composition. On the other hand, the more weakly bound water evaporation from the clusters depends strongly on the ionization. Thus, for the hydrated clusters, the neutral cluster size can hardly be estimated from the mass spectra.

Název v anglickém jazyce

Hydrated Formic Acid Clusters and their Interaction with Electrons

Popis výsledku anglicky

We investigate ion formation in hydrated formic acid (FA) clusters upon collision with electrons of variable energy, focusing on electron ionization at 70 eV (EI) and low-energy (1.5–15 eV) electron attachment (EA). To uncover details about the composition of neutral clusters, we aim to elucidate the ion formation processes in FAM ⋅ WN clusters initiated by interaction with electrons and determine the extent of cluster fragmentation. EI predominantly produces protonated [FAm+H]+ ions, and in FA-rich clusters, the stable ring structures surrounding H3O+ ions are formed. In contrast, EA leads to a competition between the formation of intact [FAm ⋅ Wn]− and dissociated [FAm ⋅ Wn−H]− fragment ions, influenced by the cluster size, level of hydration, and electron energy. Our findings reveal a predisposition of low-energy EA towards forming [FAm ⋅ Wn]−, while higher electron energies tend to favor the formation of [FAm ⋅ Wn−H]− due to intracluster ion-molecule reactions. The comparison of positive and negative ion spectra suggests that the mass spectra of FA-rich clusters may indicate their actual size and composition. On the other hand, the more weakly bound water evaporation from the clusters depends strongly on the ionization. Thus, for the hydrated clusters, the neutral cluster size can hardly be estimated from the mass spectra.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GA24-11390S" target="_blank" >GA24-11390S: Nanoklastry atmosférických aerosolů v experimentech s molekulovými paprsky a počítačových simulacích</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

ChemPhysChem

ISSN

1439-4235

e-ISSN

1439-7641

Svazek periodika

25

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

e202400071

Kód UT WoS článku

001180593300001

EID výsledku v databázi Scopus

2-s2.0-85186848821