Porphyrin(2.1.2.1) organopalladium complexes as efficient singlet oxygen sensitizers. 2024

Xiaojuan Lv, and Yuting Dong, and Jinrong Wu, and Tao Jiang, and Feng Chen, and Tao Zhang, and Fengxian Qiu, and Songlin Xue
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China. fengjchen@ujs.edu.cn.

Four new non-planar and non-aromatic porphyrin organopalladium complexes were synthesized. Conformational structures and optical and electronic properties of the obtained organopalladium complexes containing meso-substituted phenyl, p-tert-butylphenyl, or pentafluorophenyl groups were fully investigated. These complexes showed potent capacity for singlet oxygen (1O2) generation under blue-light irradiation, and the 1O2 quantum yields were in the range of 41%-56%, which were comparable to that of Ru(bpy)3Cl2 (57%), and such potency made these organopalladium complexes potential 1O2 photo sensitizers for photodynamic therapy.

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