Intramolecular Fluorescence Quenching in Ferrocene-Naphthalimide Dyads

The intramolecular fluorescence quenching in ferrocenoyl naphthalimide dyads has been studied. In the dyads, the singlet excited state of naphthalirnide (NA) could be effectively quenched by the ferrocene center. When ferrocene (Fc) was oxidized chemically, the intramolecular electron transfer from the oxidized ferrocene (Fc) would be inhibited and the fluorescence of NA moiety would be recovered.