Figure 1.

Normalised absorbance (solid line), excitation (dotted line) and phosphorescence (dashed line) spectra of solutions of 7_Pyr  (a) and 7_Benzo  (b). Absorption was measured in CH₂Cl₂ at r.t., phosphorescence and excitation in CHCl₃/EtOH (1 : 1 v/v) glassy matrix at 77 K.