Fig. 2.

Performance characterization of DCS-Ru₂BA₂and exploration of the crosslinking mechanism. SEM images of CS (A, B) and DCS (C, D); scale bars 10 μm and 5 μm. (E) FTIR spectra of CS and DCS. (F) FTIR spectra of DCS with differing degrees of substitution. (G) Photographs of CS and DCS. (H) Photographs of DCS-RuB₂A₂. (I) UV–Vis spectral evolution of RuB₂A₂ (100 μmol L⁻¹) in deionized water with increasing irradiation time (λex = 450 nm, 14 mW cm⁻²). (J) The wavelength corresponding to the UV absorption peak of RuB₂A₂ varies with illumination time. Pink represents the first stage and blue represents the second stage. (K) HPLC analysis of the photodegradation of crosslinkers under dark conditions (blue) and after illumination (orange). (L, M) SEM images of DCS-RuB₂A₂; scale bars 10 μm and 1 μm. (N) FTIR spectra of DCS-RuB₂A₂. (O-Q) Mapping images of C, O, and Ru elements of DCS-RuB₂A₂ in (L).