Photoinduced electron transfer in a non-covalently linked donor-acceptor system: a bis-porphyrinic host and a naphthalene diimide guest

Complexation of the two pyridyl residues of a naphthalene imide guest by a V-shaped bis-porphyrinic host occurs with an association constant of the order of 10(8) M-1 and results in the quenching of the porphyrin luminescence with a rate of 1.2 x 10(10) s(-1), assigned to electron transfer.