Figure 6

The fluorescence spectra of PSt (curve a, 0.50 g dm–3) and PCHO (curve b, 0.50 g dm–3), obtained by the irradication (λ>340 nm) of St and CHO in the presence of 0.2 mol% 1c at room temperature, respectively, in nitrogen-saturated chloroform at room temperature. The excitation wavelength was 283 nm.