Abstract

Based on the principles of Fourier spectroscopy of non-equilibrium systems a method for the separate determination of net and multiplet type CIDNP effects in chemical reactions is developed. Further, a theoretical model for the analysis of time evolution of high-field CIDNP following pulse initiated reactions is extended to cover multiplet effects. Experimental data on multiplet and net CIDNP effects created by laser photolysis of di-tert-butyl ketone are presented and verify the theoretical conclusions. The observed magnitudes of net and multiplet effects support the Pedersen-Freed high-field radical pair theory.

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