Fig. 2: Photochromic properties of PMC2.
From: Photochromism of pyridine-substituted merocyanine through reversible C-N bond formation

A Absorption spectra of PMC2 before (black) and after (red) 500 nm LED irradiation for 10 s, and then thermally recovered (room temperature without LED) for 10 h (blue). B Photo-response kinetic curve of PMC2. Arrow indicates the operation of turning on LED lamp. C Thermal recovery kinetic curves of PMC2 at 25 °C (black) and 50 °C (red). D Cyclic stability of PMC2 in water under repeated light stimulations (500 nm LED for 10 s) and thermal recovery (room temperature for 10 h). E Photographs illustrating the photochromism and concomitant phase transfer of PMC2 upon 500 nm LED irradiation. F Photochromism of PMC2 to SIZ2 in pH 1-12 buffer solution.