The reaction of C5N− with acetylene as a possible intermediate step to produce large anions in Titan's ionosphere

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F18%3A00482769" target="_blank" >RIV/61388955:_____/18:00482769 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1039/C7CP06302D" target="_blank" >http://dx.doi.org/10.1039/C7CP06302D</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/C7CP06302D" target="_blank" >10.1039/C7CP06302D</a>

Result language

angličtina

Original language name

The reaction of C5N− with acetylene as a possible intermediate step to produce large anions in Titan's ionosphere

Original language description

A theoretical and experimental investigation of the reaction C5N− + C2H2 has been carried out. This reaction is of astrophysical interest since the growth mechanism of large anions that have been detected in Titan's upper atmosphere by the Cassini plasma spectrometer are still largely unknown. The experimental studies have been performed using a tandem quadrupole mass spectrometer which allows identification of the different reaction channels and assessment of their reaction thresholds. Results of these investigations were compared with the predictions of ab initio calculations, which identified possible pathways leading to the observed products and their thermodynamical properties. These computations yielded that the majority of these products are only accessible via energy barriers situated more than 1 eV above the reactant energies. In many cases, the thresholds predicted by the ab initio calculations are in good agreement with the experimentally observed ones. For example, the chain elongation reaction leading to C7N−, although being slightly exoergic, possesses an energy barrier of 1.91 eV. Therefore, the title reaction can be regarded to be somewhat unlikely to be responsible for the formation of large anions in cold environments such as interstellar medium or planetary ionospheres.n

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10403 - Physical chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

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

Name of the periodical

Physical Chemistry Chemical Physics

ISSN

1463-9076

e-ISSN

—

Volume of the periodical

20

Issue of the periodical within the volume

8

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

5377-5388

UT code for WoS article

000427085400005

EID of the result in the Scopus database

2-s2.0-85042610688