Figure 3.

A) Schematic representation of the sol–gel transition of G1 under UV and green light irradiation in toluene. SEM images of 10 mg mL⁻¹ G1 in toluene at B) 5k and C) 25k magnification [scale bars: B) 2 μm and C) 400 nm]. D) “WWU” was written in an organogel of 10 mg mL⁻¹ G1 in toluene by UV light using a positive photomask.