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Schematic diagram of PCN–224 structure. (a) The 3D nanoporous structure of Zr6 metal cluster, H2TCPP ligand and PCN–224. (b) The PCN–224 cube element, with its composition of spherical nanoparticles of different sizes. (c) Comparison of killing effect of 90 nm–PCN–224 on HeLa cells under different laser conditions. (d) Comparison of photodynamic therapy effect of PCN–224 and 1/4 FA–PCN–224 in vitro. Reproduced with permission from Ref. [96]. Copyright 2016, American Chemical Society.
