H/D exchange in reactions of OH- with D-2 and of OD- with H-2 at low temperatures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10319428" target="_blank" >RIV/00216208:11320/15:10319428 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1039/c5cp00516g" target="_blank" >http://dx.doi.org/10.1039/c5cp00516g</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c5cp00516g" target="_blank" >10.1039/c5cp00516g</a>

Jazyk výsledku

angličtina

Název v původním jazyce

H/D exchange in reactions of OH- with D-2 and of OD- with H-2 at low temperatures

Popis výsledku v původním jazyce

Using a cryogenic linear 22-pole rf ion trap, rate coefficients for H/D exchange reactions of OH- with D-2 (1) and OD- with H-2 (2) have been measured at temperatures between 11 K and 300 K with normal hydrogen. Below 60 K, we obtained k(1) = 5.5 x 10(-10) cm(3) s(-1) for the exoergic reaction (1). Upon increasing the temperature above 60 K, the data decrease with a power law, k(1)(T) similar to T-2.7, reaching approximate to 1 x 10(-10) cm(3) s(-1) at 200 K. This observation is tentatively explained with a decrease of the lifetime of the intermediate complex as well as with the assumption that scrambling of the three hydrogen atoms is restricted by the topology of the potential energy surface. The rate coefficient for the endoergic reaction (2) increases with temperature from 12 K up to 300 K, following the Arrhenius equation, k(2) = 7.5 x 10(-11) exp(-92 K/T) cm(3) s(-1) over two orders of magnitude. The fitted activation energy, EA-Exp = 7.9 meV, is in perfect accordance with the en

Název v anglickém jazyce

H/D exchange in reactions of OH- with D-2 and of OD- with H-2 at low temperatures

Popis výsledku anglicky

Using a cryogenic linear 22-pole rf ion trap, rate coefficients for H/D exchange reactions of OH- with D-2 (1) and OD- with H-2 (2) have been measured at temperatures between 11 K and 300 K with normal hydrogen. Below 60 K, we obtained k(1) = 5.5 x 10(-10) cm(3) s(-1) for the exoergic reaction (1). Upon increasing the temperature above 60 K, the data decrease with a power law, k(1)(T) similar to T-2.7, reaching approximate to 1 x 10(-10) cm(3) s(-1) at 200 K. This observation is tentatively explained with a decrease of the lifetime of the intermediate complex as well as with the assumption that scrambling of the three hydrogen atoms is restricted by the topology of the potential energy surface. The rate coefficient for the endoergic reaction (2) increases with temperature from 12 K up to 300 K, following the Arrhenius equation, k(2) = 7.5 x 10(-11) exp(-92 K/T) cm(3) s(-1) over two orders of magnitude. The fitted activation energy, EA-Exp = 7.9 meV, is in perfect accordance with the en

Druh

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

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Physical Chemistry Chemical Physics

ISSN

1463-9076

e-ISSN

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Svazek periodika

17

Číslo periodika v rámci svazku

14

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

8732-8739

Kód UT WoS článku

000351933600023

EID výsledku v databázi Scopus

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