… Excited-state intramolecular proton transier reactions are reviewed. Special em$z~sis is
given to the intrinsic processes and to the mechanisms of … When either the acidic or basic
moieties of the same motecule become stronger acids or bases in the excited state, proton
transfer (PT) may occur rapidly in the excited state to form a tautomer. The majority of
reactions of this type involve the transfer of a proton from an oxygen donor to an oxygen or
nitrogen acceptor, although a few cases are known where a nitrogen atom can function as …