Photodissociation of CH2ICH2I, CF2ICF2I, and CF2BrCF2I in solution
(2002) In The Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory 106(31). p.7090-7098- Abstract
- The photodissociation dynamics of CH2ICH2I, CF2ICF2I, and CF2BrCF2I have been studied in solution after excitation at 266 nm. Formation of I-2 is apparent within tens of picoseconds in solutions of CH2ICH2I and CF2ICF2I in acetonitrile. but not from CF2BrCF2I, More I-2 is formed from CH2ICH2I rather than from CF2-ICF2I, as expected if the 12 formation is a result of secondary dissociation of the haloethyl radicals followed by geminate combination. For CH2ICH2I, the 12 formation is ultrafast (<2 ps) in several different solvents. The quantum yields Of 12 formation (after a few microseconds) were found to be 1.0+/-0.1 for CH2ICH2I and 0.75-0.95 for CF2ICF2I in hexane, dichloromethane, and tetrachloromethane. The data on a nanosecond to... (More)
- The photodissociation dynamics of CH2ICH2I, CF2ICF2I, and CF2BrCF2I have been studied in solution after excitation at 266 nm. Formation of I-2 is apparent within tens of picoseconds in solutions of CH2ICH2I and CF2ICF2I in acetonitrile. but not from CF2BrCF2I, More I-2 is formed from CH2ICH2I rather than from CF2-ICF2I, as expected if the 12 formation is a result of secondary dissociation of the haloethyl radicals followed by geminate combination. For CH2ICH2I, the 12 formation is ultrafast (<2 ps) in several different solvents. The quantum yields Of 12 formation (after a few microseconds) were found to be 1.0+/-0.1 for CH2ICH2I and 0.75-0.95 for CF2ICF2I in hexane, dichloromethane, and tetrachloromethane. The data on a nanosecond to microsecond time scale indicate that all haloethyl radicals decay within tens of nanoseconds. We suggest that the decay of haloethyl radicals can occur partially via abstraction. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/331966
- author
- Rasmusson, M ; Tarnovsky, Alexander LU ; Pascher, Torbjörn LU ; Sundström, Villy LU and Åkesson, Eva LU
- organization
- publishing date
- 2002
- type
- Contribution to journal
- publication status
- published
- subject
- in
- The Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory
- volume
- 106
- issue
- 31
- pages
- 7090 - 7098
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000177314300003
- scopus:0037044072
- ISSN
- 1520-5215
- DOI
- 10.1021/jp020720n
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
- id
- bf578356-7a7f-4716-899d-64c14933f6d0 (old id 331966)
- date added to LUP
- 2016-04-01 15:27:19
- date last changed
- 2023-04-07 10:59:21
@article{bf578356-7a7f-4716-899d-64c14933f6d0, abstract = {{The photodissociation dynamics of CH2ICH2I, CF2ICF2I, and CF2BrCF2I have been studied in solution after excitation at 266 nm. Formation of I-2 is apparent within tens of picoseconds in solutions of CH2ICH2I and CF2ICF2I in acetonitrile. but not from CF2BrCF2I, More I-2 is formed from CH2ICH2I rather than from CF2-ICF2I, as expected if the 12 formation is a result of secondary dissociation of the haloethyl radicals followed by geminate combination. For CH2ICH2I, the 12 formation is ultrafast (<2 ps) in several different solvents. The quantum yields Of 12 formation (after a few microseconds) were found to be 1.0+/-0.1 for CH2ICH2I and 0.75-0.95 for CF2ICF2I in hexane, dichloromethane, and tetrachloromethane. The data on a nanosecond to microsecond time scale indicate that all haloethyl radicals decay within tens of nanoseconds. We suggest that the decay of haloethyl radicals can occur partially via abstraction.}}, author = {{Rasmusson, M and Tarnovsky, Alexander and Pascher, Torbjörn and Sundström, Villy and Åkesson, Eva}}, issn = {{1520-5215}}, language = {{eng}}, number = {{31}}, pages = {{7090--7098}}, publisher = {{The American Chemical Society (ACS)}}, series = {{The Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory}}, title = {{Photodissociation of CH2ICH2I, CF2ICF2I, and CF2BrCF2I in solution}}, url = {{http://dx.doi.org/10.1021/jp020720n}}, doi = {{10.1021/jp020720n}}, volume = {{106}}, year = {{2002}}, }