Photoinduced electron transfer reaction is one of the most promising front fields in organic photochemistry. It created a brand new field - ion radicals chemistry. And Chemically Induced Dynamic Nuclear Polarization (CIDNP) is one of the most powerful means to study free radical reactions and structures of the intermediates.
Firstly in this present paper, we use CIDNP technology to study the mechanistic aspects of photoinduced cycloaddition reactions of two benzoquinone derivatives with four aryla...