Fig. 3. Absorption spectra (solid line) and fluorescence spectra (dashed line) of C_Br2Naph2 and C_Naph4 (blue), C_Br2NI2 and C_NI4 (yellow), C_Br2BY2 and C_BY4 (red), and C_NI2BY2 (green) in CH₂Cl₂. All spectra were recorded at 20 °C; c ∼10⁻⁶ mol L⁻¹ for absorption and c ∼10⁻⁷ mol L⁻¹ for emission.