Table 3.

Residence time and conversion with different light sources.^a

Light source	Residence time [min]	Conversion [%]
Energy-saving lamp (white)	6.25	75
LED (white)	1.50	87
LED (white)	3.50	>99
LED (red)	3.50	80
LED (red)	6.25	92
LED (red)	8.00	>99

^aThe reactions were performed in acetonitrile at 10 °C with concentrations of 0.1 M 1a, 1 mM methylene blue, and a back-pressure of 2.4 bar (inlet pressure 10 bar). The conversions of the photooxidation were determined by quantitative GC/FID vs internal standard dodecanenitrile.