Figure 4
From: Mechanistic insights into photochromic 3H-naphthopyran showing strong photocoloration
Kinetics of absorption upon switching on and off UV light at 365 nm (4.1 mW/cm2) for 2 and 1 in cyclohexane probed at 430 nm using a Jasco spectrophotometer, temperature set at 21 °C. Solutions prepared with the same absorbance A(365 nm, 1 cm) = 0.39.
