Solvent effects on the magnetic-field-dependent reaction yields of 
photogenerated radical ion pairs.

Staerk, H.; Busmann, H. G.; Kühnle, W.; Weller, A.

doi:10.1016/0009-2614(89)87481-0

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Solvent effects on the magnetic-field-dependent reaction yields of photogenerated radical ion pairs.

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Staerk, H.
Department of Spectroscopy and Photochemical Kinetics, MPI for biophysical chemistry, Max Planck Society;

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Busmann, H. G.
Abteilung Spektroskopie, MPI for biophysical chemistry, Max Planck Society;

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Kühnle, W.
Department of Spectroscopy and Photochemical Kinetics, MPI for biophysical chemistry, Max Planck Society;

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Weller, A.
Abteilung Spektroskopie, MPI for biophysical chemistry, Max Planck Society;

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Citation

Staerk, H., Busmann, H. G., Kühnle, W., & Weller, A. (1989). Solvent effects on the magnetic-field-dependent reaction yields of photogenerated radical ion pairs. Chemical Physics Letters, 155(6), 603-608. doi:10.1016/0009-2614(89)87481-0.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002C-5D82-6

Abstract

A pronounced solvent viscosity and polarity dependence of the magnetic field effect was found for polymethylene-linked radical ion pairs generated by photoinduced intramolecular electron transfer in compounds of the type pyrene-(CH2)n-N,N-dimethylaniline, with n = 7–16. This is interpreted in terms of the general radical pair mechanism, i.e. the nuclear hyperfine interaction mechanism including a spin-exchange interaction, modulated by the stochastic folding motion of the linking CH2 chain which leads to a “motional deformation” of the reaction yield spectra.