Porphyrins are ubiquitous in nature and are of great interest due to their excellent photophysical and electrochemical properties.However,intrinsic defects of porphyrins,such as instabilities,self-quenching,and poor water solubility,limit its biological applications.In recent years,researchers have focused on incorporating porphyrins into metal-organic frameworks(MOFs)or using them as organic linkers to create porphyrinic metal-organic frameworks(PMOFs).PMOFs can not only overcome the limitations of porphyrins,but also combine the unique properties of porphyrins and MOFs.In this work,three zirconium-based porphyrin metal-organic frameworks PCN-224 with different morphological features were synthesized by varying the reaction conditions.These MOFs not only maintain the characteristic of porphyrin producing singlet oxygen(1O2)under red light irradiation,but also serves as drug carriers,providing new ideas for the structural regulation and biological applications of PMOFs.
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