Reaction Promoted by Libration

Excitation and H-transfer reaction.

Upon UV-excitation of acridine to its lowest excited pp* triplet state a hydrogen atom can be transferred from the fluorene CH2 group to the aza-position of acridine to form an excited state  radical pair as reaction product. The reaction is fully reversible, the radical pair quickly decays back to the ground state of the reaction educts.

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