Fig. 2: Photolabile crosslinkers can be selectively cleaved with differently colored visible light.
From: Tricolor visible wavelength-selective photodegradable hydrogel biomaterials
a Rubiq (pink heptagon), Rubpy (green hexagon), and oNB (blue pentagon) individually subjected to 617, 530, and 405 nm light (10 mW cm−2, 0–60 min) undergo wavelength-selective photolysis, indicated by absorbance spectral changes. b Photolysis proceeds efficiently with varied power (5, 10, 20 mW) in a light dose-dependent manner. Here, light dosage is calculated as the product of light intensity and exposure time. n = 3 for each photolysis, error bars represent standard deviation about the experimental mean. c Color change was observed for Rubiq and Rubpy upon irradiation (10 mW, varied wavelengths and exposure times) due to the significant absorbance shift following ligand exchange.
