English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Kinetic and spectroscopic studies of the reaction of CF2 with H2 in shock waves.

Cobos, C. J., Knight, G., Sölter, L., Tellbach, E., & Troe, J. (2017). Kinetic and spectroscopic studies of the reaction of CF2 with H2 in shock waves. Journal of Physical Chemistry A, 121(41), 7827-7834. doi:10.1021/acs.jpca.7b05859.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-FCB5-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-1226-2
Genre: Journal Article

Files

show Files
hide Files
:
2483805.pdf (Publisher version), 926KB
 
File Permalink:
-
Name:
2483805.pdf
Description:
-
Visibility:
Restricted (Max Planck Institute for Biophysical Chemistry (Karl Friedrich Bonhoeffer Institute), Göttingen; )
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Cobos, C. J., Author
Knight, G., Author
Sölter, L.1, Author              
Tellbach, E.2, Author              
Troe, J.1, Author              
Affiliations:
1Emeritus Group of Spectroscopy and Photochemical Kinetics, MPI for Biophysical Chemistry, Max Planck Society, ou_578625              
2Department of Dynamics at Surfaces, MPI for Biophysical Chemistry, Max Planck Society, ou_578600              

Content

show
hide
Free keywords: -
 Abstract: The reaction of CF2 with H2 was studied in shock waves by monitoring UV absorption signals. CF2 was prepared by thermal dissociation of C2F4 (or of c-C3F6). The rate constant of the reaction CF2 + H2 → CHF + HF near 2000 K was found to be close to 1011 cm3 mol-1 s-1, consistent with earlier information on the reverse reaction CHF + HF → CF2 + H2 and a modeled equilibrium constant. The kinetic studies were accompanied by spectroscopic investigations. Absorption cross sections of C2F4 between 190 and 220 nm were measured near 1000 K and compared with room temperature values from the literature. Likewise, absorption cross sections of CF2 near 2000 K were measured between 210 and 300 nm and compared with room temperature data. Additional, superimposed, absorption signals were recorded during the reaction and identified by their time-dependence and by quantum-chemical calculations employing time-dependent density functional theory. A previously unknown absorption spectrum of CHF radicals near 200 nm was identified and its wavelength dependence determined. Further strong absorptions between 190 and 300 nm were attributed to CH2F radicals. Absorptions at longer wavelengths, reaching up to 510 nm were postulated to arise from C2 radicals formed at later stages of the reaction.

Details

show
hide
Language(s): eng - English
 Dates: 2017-09-262017-10-19
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1021/acs.jpca.7b05859
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Physical Chemistry A
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 121 (41) Sequence Number: - Start / End Page: 7827 - 7834 Identifier: -