The SNP measurement of the electron transfer reaction from quadricyclane to tetrafluoro-p-benzoquinone

The stimulated nuclear polarization (SNP) [1] is measured in the photoinduced electron transfer reaction from quadricyclane to tetrafluoro-p-benzoquinone. We conclude that the radicalion pair in this system involves quadricyclane cation radical and that the isomerization reaction from quadricyclane cation radical to norbornadiene cation radical mainly occurs outside the cage of radical-ion pair.