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. 2021 Nov 2;11(11):436. doi: 10.3390/bios11110436

Scheme 1.

Scheme 1

Schematic illustration of strategies and mechanisms for activatable NIR-II fluorescent probes. Image for pH: reproduced from publication of Wang, S. et al. with permission, Copyright 2019, Nature Publishing Group. Image for enzymes: reproduced from publication of Zhan, Y. et al. with permission, Copyright 2021, WILEY-VCH. Image for ROS: reproduced from publication of Zhang, X. et al. with permission, Copyright 2021, American Chemical Society. Image for RNS: reproduced from publication of Yang, X. et al. with permission, Copyright 2021, WILEY-VCH. Image for RSS: reproduced from publication of Dou, K. et al. with permission, Copyright 2021, American Chemical Society. Image for hypoxia: reproduced from publication of Meng, X. et al. with permission, Copyright 2018, Creative Commons. Image for viscosity: reproduced from publication of Dou, K. et al. with permission, Copyright 2021, American Chemical Society. Image for dual: reproduced from publication of Tang, Y. et al. with permission, Copyright 2018, WILEY-VCH.