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Electron spin relaxation of photochemically generated radical pairs diffusing in micellar supercages

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Electron_spin_relaxation_of_photobiochemically_generated_radical_pairs_diffusing_in_micellar_supercages.pdf
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1992

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Wu, Jie Qiang

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-47330
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https://doi.org/10.1016/0301-0104(92)80220-P
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Attribution-NonCommercial-NoDerivs 2.0 Generic

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Chemical Physics. 1992, 162(1), pp. 53-67. ISSN 0301-0104. Available under: doi: 10.1016/0301-0104(92)80220-P

Zusammenfassung

A kinetic analysis of previous experimental data [T. Ulrich and U.E. Steiner, Chem. Phys. Letters 112 (1984) 365] on the magnetic-field dependent recombination kinetics of radical pairs photochemically produced with triplet spin correlation in water-in-oil microemulsion droplets of variable size (rM) provided the rM- and field-dependence of the rate constant kr of the T± {\rightleftharpoons} S, T0 spin relaxation process. It was found independent of rM at low fields, but strongly decreasing with increasing rM at fields greater-than or equivalent to 100 G. The latter behaviour was attributed to the mechanism of electron-spin dipolar interaction. Quantitative treatments of this relaxation mechanism are provided (i) by adapting Torrey's analytical result for homogeneous solution to the situation of one radical pair in a micellar supercage and (ii) by Monte Carlo calculation of the autocorrelation function of the pertinent perturbation matrix element, considering diffusion in the volume or on the surface of the supercage. The electron-spin dipolar relaxation mechanism can quantitatively account for the experimental data on kr at fields greater-than or equivalent to 100 G.

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540 Chemie

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ISO 690STEINER, Ulrich, Jie Qiang WU, 1992. Electron spin relaxation of photochemically generated radical pairs diffusing in micellar supercages. In: Chemical Physics. 1992, 162(1), pp. 53-67. ISSN 0301-0104. Available under: doi: 10.1016/0301-0104(92)80220-P
BibTex
@article{Steiner1992Elect-9861,
  year={1992},
  doi={10.1016/0301-0104(92)80220-P},
  title={Electron spin relaxation of photochemically generated radical pairs diffusing in micellar supercages},
  number={1},
  volume={162},
  issn={0301-0104},
  journal={Chemical Physics},
  pages={53--67},
  author={Steiner, Ulrich and Wu, Jie Qiang}
}
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