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(a) Schematic illustration of photoreactions involving photosensitive compounds induced by UV and visible light produced by upconverted NIR radiation. (b) Under NIR irradiation, upconverted blue light triggers cleavage of the Ru complexes and drug release. (c) Doxorubicin release profiles with laser power and irradiation time. Reproduced with permission from [70]. Copyright The Royal Society of Chemistry, 2015.
