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. 2022 Jan 24;9:834171. doi: 10.3389/fchem.2021.834171

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Copyright © 2022 Zhao, Zhang, Wu and Xu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) The schematic illustration of synthesis process of mixed-ligand M-UiO NMOF and R-UiO NMOF; Schematic illustration of R-UiO NMOF offers oxygen generation under 514 nm light irradiation. (B) TEM images of R-UiO. (C) Emission spectra (λex = 514 nm) and (D) phosphorescent decays (λex = 405 nm) of R-UiO-1 in HBSS buffer under various oxygen partial pressures. Ratiometric luminescence imaging (λex = 514 nm) of CT26 cells after incubation with R-UiO-2 under (E) hypoxia, (G) normoxia, and (F) aerated conditions. Scale bar: 10 μm. Source: (Xu et al., 2016).