Figure 3.

pH‐Dependent reactivity. A) UV/Vis spectra of MeO‐PEG‐SPP and corresponding action plots under various pH conditions (green squares: aqueous, yellow circles: pH 5, orange triangles: pH 3, red diamonds: pH 1). In all experiments, approximately 105 μmol of photons were deposited (Table S2–S4). B) Conversion to cycloaddition products as a function of pH for MeO‐PEG‐SPP (black squares) and MeO‐PEG‐AP (red circles); irradiation conditions: λ=480 nm (6.32±0.18×10¹⁹ photons) for MeO‐PEG‐SPP, and λ=420 nm (6.38±0.36×10¹⁹ photons) for MeO‐PEG‐AP.