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Size engineering of 2D MOF nanosheets for enhanced photodynamic antimicrobial therapy

中国化学快报:英文版 2023年第9期34卷 219-224页

作者： Baoli Xue Xiwen Geng Haohao Cui Huiying Chen Zhikang Wu Hong Chen Hai Li Zhan Zhou Meiting Zhao Chaoliang Tan Jingguo Li Henan Provincial People’s Hospital People’s Hospital of Zhengzhou UniversityZhengzhou 450003China College of Chemistry and Chemical Engineering Henan Key Laboratory of Function-Oriented Porous MaterialsLuoyang Normal UniversityLuoyang 471934China Luoyang Key Laboratory of Organic Functional Molecules College of Food and DrugLuoyang Normal UniversityLuoyang 471934China Institute of Advanced Materials(IAM)and Key Laboratory of Flexible Electronics(KLoFE) Nanjing Tech University(NanjingTech)Nanjing 211816China Department of Chemistry Institute of Molecular Aggregation ScienceTianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin UniversityTianjin 300072China Department of Chemistry and Center of Super-Diamond and Advanced Films(COSDAF) City University of Hong KongHong Kong 999077China Shenzhen Research Institute City University of Hong KongShenzhen 518057China Pharmaceutical Sciences Laboratory Abo Akademi UniversityTurku 20520Finland

Although porphyrin-based metal-organic frameworks(mofs)have been widely explored as photosensitizers for photodynamic therapy,how the size will affect the light-induced catalytic activity for generation of reactive oxygen species(ROS)still remain unclear.Herein,we first report the size-controlled synthesis of two-dimensional(2D)porphyrin-based pcn-134 MOF nanosheets by a two-step solvothermal method to explore the size effect on its PDT performance,thus yielding enhanced photodynamic antimicrobial therapy.By simply controlling the reaction temperature in the synthesis process,the bulk pcn-134 crystal,large pcn-134(L-pcn-134)nanosheets with a lateral size of 2–3μm and thickness of 33.2–37.5 nm and small pcn-134 nanosheets(S-pcn-134)with a lateral size of 160–180 nm and thickness of 9.1–9.7 nm were successfully prepared.Interestingly,the S-pcn-134 nanosheets exhibit much higher photodynamic activity for ROS generation than that of the bulk 3D pcn-134 crystal and L-pcn-134 nanosheets under a660 nm laser irradiation,suggesting that the photodynamic activity of pcn-134 MOF increases when the size reduces.Therefore,the S-pcn-134 nanosheets show much enhanced performance when used as a photosensitizer for photodynamic antimicrobial activity and wound healing.

关键词： 2D nanosheets pcn-134 mofs Size effect Photodynamic therapy Antibacterial

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