Au<sup>3+</sup>‐Functionalized UiO‐67 Metal‐Organic Framework Nanoparticles: O<sub>2</sub><sup>•−</sup> and •OH Generating Nanozymes and Their Antibacterial Functions
Mengmeng Pan, Yu Ouyang, Yong‐Li Song, Luqin Si, Ming Jiang, Xu Yu, Li Xu, Itamar Willner
Abstract
Abstract The synthesis and characterization of Au 3+ ‐modified UiO‐67 metal‐organic framework nanoparticles, Au 3+ ‐NMOFs, are described. The Au 3+ ‐NMOFs reveal dual oxidase‐like and peroxidase‐like activities and act as an active catalyst for the catalyzed generation of O 2 •− under aerobic conditions or •OH in the presence of H 2 O 2 . The two reactive oxygen species (ROS) agents O 2 •− and •OH are cooperatively formed by Au 3+ ‐NMOFs under aerobic conditions, and in the presence of H 2 O 2. The Au 3+ ‐NMOFs are applied as an effective catalyst for the generation ROS agents for antibacterial and wound healing applications. Effective antibacterial cell death and inhibition of cell proliferation of Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E . coli ) bacterial colonies are demonstrated in the presence of the Au 3+ ‐NMOFs. In addition, in vivo experiments demonstrate effective wound healing of mice wounds infected by S. aureus , treated by the Au 3+ ‐NMOFs.