▎ 摘　　要

On the basis of the Diels-Alder reaction of graphite and tetracyanoethylene, graphite has been mechanically exfoliated into graphene adducts in a yield up to 38%. The graphene adduct can restore its conjugated structure via retro-Diels-Alder reaction under mild conditions, exhibiting a high conductivity of 1035 S m(-1).