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Photo-oxygenation capability of PCN−222@ICG. (a) UV-vis absorbance of DPBF in the presence of PCN−222@ICG when exposed to NIR light for 0–10 min (black to cyan represents 0 min to 10 min with a 2-min interval). (b) Comparison of UV-vis absorbance signal of DPBF at 414 nm between PCN−222 and PCN−222@ICG upon NIR light for 0–10 min. (c) ESR spectra of PCN@222 and PCN−222@ICG after exposure to NIR light for 5 min and 10 min.
