Fig. 5. US-induced release of UMB and GEM from β-carbonate disulfide polymer P2 (3 mg mL−1) and control 2 (25 μM) in MeCN : H2O = 2 : 3 (v/v). (a) UV-vis and fluorescence (λexc = 325 nm) spectra of P2 during sonication. (b) Released UMB from P2 and controls 2 and P3 during sonication calculated from fluorescence peak intensity of UMB at λem = 450 nm. Inset: photograph of the solutions under UV-light (λexc = 365 nm). (c) Released amount of UMB and GEM over time visualized by PDA detector signal intensities from UPLC elugrams (Fig. S46†).
