DOI: 10.1063/1.1671321. Pairwise Trapping of Radicals in Irradiated <i>n</i>-Hydrocarbons and Related Compounds as Studied by Electron Spin Resonance

Pairwise Trapping of Radicals in Irradiated n-Hydrocarbons and Related Compounds as Studied by Electron Spin Resonance

10.1063/1.1671321

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

The ESR signals due to the radical pairs were found in n-hydrocarbons γ irradiated at 77°K. Besides the spectra due to the ΔMs = 2 transition, ΔMs = 1 spectra were also found on the tail of the predominant spectra of isolated radicals. The ΔMs = 1 spectra of the radical pairs show nearly the same hyperfine splitting as that of the ΔMs = 2 spectra. From the analysis of the ΔMs = 1 spectra, the separation d‖ due to the zero-field splitting was determined to be 292 G from which the distance of the paired radicals was estimated to be 5.75 Å. The radical pairs are probably in the form of two alkyl radicals on the adjacent hydrocarbon chains. The value of 5.75 Å is consistent with the intercarbon distance between the adjacent chains aligned along the direction of the crystalline b axis. A glassy hydrocarbon such as squalane also gave the ΔMs = 2 spectrum but did not give the hyperfine lines on the tail of the ΔMs = 1 spectrum as is the case of high polymers. In addition, the effect of aditives and substituents was also investigated together with some other related compounds and the mechanism of the pairwise formation of radicals was discussed.

Bibliography

Iwasaki, M., Ichikawa, T., & Ohmori, T. (1969). Pairwise Trapping of Radicals in Irradiated n-Hydrocarbons and Related Compounds as Studied by Electron Spin Resonance. The Journal of Chemical Physics, 50(5), 1991â1997.

Authors 3

Machio Iwasaki (first)
Takahisa Ichikawa (additional)
Toshio Ohmori (additional)

References 14 Referenced 30

10.1063/1.1841133 / J. Chem. Phys. (1967)
10.1063/1.1671320 / J. Chem. Phys. (1969)
{'key': '2024020904471603300_r3'}
10.1021/j100871a081 / J. Phys. Chem. (1967)
10.1107/S0365110X59000901 / Acta Cryst. (1959)
10.1107/S0365110X5600111X / Acta Cryst. (1956)
{'key': '2024020904471603300_r7'}
10.1063/1.1731155 / J. Chem. Phys. (1960)
{'key': '2024020904471603300_r8a'}
10.1063/1.1734429 / J. Chem. Phys. (1963)
10.1063/1.1727211 / J. Chem. Phys. (1966)
10.1063/1.1733026 / J. Chem. Phys. (1962)
{'key': '2024020904471603300_r10'}
10.1063/1.1697211 / J. Chem. Phys. (1965)

Dates

Type	When
Created	21 years, 6 months ago (Feb. 4, 2004, 4:37 p.m.)
Deposited	1 year, 6 months ago (Feb. 8, 2024, 11:49 p.m.)
Indexed	1 year, 6 months ago (Feb. 10, 2024, 10 a.m.)
Issued	56 years, 5 months ago (March 1, 1969)
Published	56 years, 5 months ago (March 1, 1969)
Published Print	56 years, 5 months ago (March 1, 1969)

Funders 0

None

BibTeX

@article{Iwasaki_1969, title={Pairwise Trapping of Radicals in Irradiated n-Hydrocarbons and Related Compounds as Studied by Electron Spin Resonance}, volume={50}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1671321}, DOI={10.1063/1.1671321}, number={5}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Iwasaki, Machio and Ichikawa, Takahisa and Ohmori, Toshio}, year={1969}, month=mar, pages={1991–1997} }

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