Fig. 6. (a) 390 nm LED-induced reactions of 1bpy (top) and 4bpy (bottom). For 4bpy, the yield is given per methyl group. (b) 5 T MCD (top) and Abs (bottom) spectra of 1bpy (red) and 4bpy (black), with the 405 nm (blue) and 532 nm (green) laser excitation energies shaded. (c) Logarithmic plots for the 1H NMR-monitored decays of 1bpy (top) and 4bpy (bottom) as a function of 405 nm (blue) and 532 nm (green) laser irradiation time. The linear regression fitting gives k532 = 2 × 10−4 min−1 and k405 = 4.2 × 10−3 min−1 for 1bpy and k532 = 3.5 × 10−3 min−1 and k405 = 1.2 × 10−1 min−1 for 4bpy.
