Figure 2.

Characterization of the SPP cycloaddition product. A) SEC data (calibrated against PMMA) of MeO‐PEG‐SPP and (MeO‐PEG‐SPP)₂ after laser irradiation at 480 nm (6.32±0.18×10¹⁹ photons which result in a pulse energy of 848 μJ) in water (10 mg mL⁻¹). B) SEC‐ESI‐MS analysis of the dimerization of MeO‐PEG‐SPP after irradiation at 480 nm. Zoom into the MS spectra of experimental and simulated isotopic patterns, indicating their excellent agreement. Detailed SEC‐ESI‐MS analysis is appended in the Supporting Information, Figure S16, S17. C) UV/Vis spectrum of MeO‐PEG‐SPP (solid black line) and the corresponding action plot (red circles) for the cycloaddition in water (10 mg mL⁻¹). Experimental details are provided in Table S1