Collisions of FeO+ with H-2 and He in a Cryogenic Ion Trap

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F16%3A10336648" target="_blank" >RIV/00216208:11310/16:10336648 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1002/cphc.201600753" target="_blank" >http://dx.doi.org/10.1002/cphc.201600753</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/cphc.201600753" target="_blank" >10.1002/cphc.201600753</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Collisions of FeO+ with H-2 and He in a Cryogenic Ion Trap

Popis výsledku v původním jazyce

The nominal temperature range of cryogenic radio-frequency ion traps has recently been extended down to T=2.3K. Whereas in situ He tagging of mass-selected ions embedded in dense helium buffer gas is becoming common for recording IR spectra through photofragmentation of small and large ions, much less activity is devoted to the field of cold chemistry, which in this contribution means the two orders of magnitude extending from 300 to below 3K. The importance of this temperature range for understanding the dynamics of bi- and termolecular reactions is illustrated with new results for the time-honored reaction of FeO+ with H-2 obtained with the cryogenic ion trap ISORI in Prague. The rate coefficient for forming Fe++H2O increases steeply with decreasing temperature. In addition more product channels open up, such as the stabilized reaction-intermediate complexes H2FeO+ and He-n-FeO+ formed by ternary association with He. For the FeOH++H channel only a minor signal is observed. The rate coefficients provide deep insight into lifetimes, bottlenecks, and barriers impeding almost completely the exothermic, but spin-forbidden, reaction at room temperature. For some of the He-tagged ions, IR predissociation spectra are recorded. A breakthrough is obtaining the first spectrum of [(H-2)FeO](+), synthesized and tagged in situ with He. These results pave the way to study the structures of reaction intermediates stabilized in the gas phase by means of collisions with helium.

Název v anglickém jazyce

Collisions of FeO+ with H-2 and He in a Cryogenic Ion Trap

Popis výsledku anglicky

The nominal temperature range of cryogenic radio-frequency ion traps has recently been extended down to T=2.3K. Whereas in situ He tagging of mass-selected ions embedded in dense helium buffer gas is becoming common for recording IR spectra through photofragmentation of small and large ions, much less activity is devoted to the field of cold chemistry, which in this contribution means the two orders of magnitude extending from 300 to below 3K. The importance of this temperature range for understanding the dynamics of bi- and termolecular reactions is illustrated with new results for the time-honored reaction of FeO+ with H-2 obtained with the cryogenic ion trap ISORI in Prague. The rate coefficient for forming Fe++H2O increases steeply with decreasing temperature. In addition more product channels open up, such as the stabilized reaction-intermediate complexes H2FeO+ and He-n-FeO+ formed by ternary association with He. For the FeOH++H channel only a minor signal is observed. The rate coefficients provide deep insight into lifetimes, bottlenecks, and barriers impeding almost completely the exothermic, but spin-forbidden, reaction at room temperature. For some of the He-tagged ions, IR predissociation spectra are recorded. A breakthrough is obtaining the first spectrum of [(H-2)FeO](+), synthesized and tagged in situ with He. These results pave the way to study the structures of reaction intermediates stabilized in the gas phase by means of collisions with helium.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Chemphyschem : a European journal of chemical physics and physical chemistry

ISSN

1439-4235

e-ISSN

—

Svazek periodika

17

Číslo periodika v rámci svazku

22

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

17

Strana od-do

3723-3739

Kód UT WoS článku

000388625000018

EID výsledku v databázi Scopus

2-s2.0-84990848510