The Structure and EPR Behavior of Short Nitroxide Biradicals Containing Sulfur Atom in the Bridge

Кокорин, А. И.; Khrustalev, Victor N.; Голубева, Е. Н.

doi:10.1007/s00723-014-0528-4

Cited by 8 publications

(1 citation statement)

References 25 publications

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“…By contrast, the value of J for XII increased with increasing temperature, and the temperature dependence was larger than for VIII , which is attributed to interaction of the solvent with the polar sulphate group . J is more strongly temperature dependent for XIII than for XII , although the value of J is about 7 times larger for XII than for XIII …”

Section: Dependence Of Spin‐spin Interaction On the Environment Of Thmentioning

confidence: 91%

Continuous wave electron paramagnetic resonance of nitroxide biradicals in fluid solution

Eaton

Woodcock

2018

Concepts Magnetic Resonance

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Nitroxide biradicals have been prepared with electron-electron spin-spin exchange interaction, J, ranging from weak to very strong. EPR spectra of these biradicals in fluid solution depend on the ratio of J to the nitrogen hyperfine coupling, AN, and the rates of interconversion between conformations with different values of J. For relatively rigid biradicals EPR spectra can be simulated as the superposition of AB splitting patterns arising from different combinations of nitrogen nuclear spin states. For more flexible biradicals spectra can be simulated with a Liouville representation of the dynamics that interconvert conformations with different values of J on the EPR timescale. Analysis of spectra, factors that impact J, and examples of applications to chemical and biophysical problems are discussed.

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Section: Dependence Of Spin‐spin Interaction On the Environment Of Thmentioning

confidence: 91%