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Porphyrin-Azobenzene-Bodipy Triads: Syntheses, Structures, and Photophysical Properties
Bangshao Yin1, Taeyeon Kim2, Mingbo Zhou1
1Key Laboratory of Chemical Biology and Traditional Chinese Medicine, Ministry of Education of China, Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University , Changsha 410081, China.
Abstract:
Cyclic and acyclic azobenzene bridged porphyrin-dipyrrin derivatives were successfully prepared via Suzuki-Miyaura coupling reaction of α,α'-diborylated dipyrromethane with bromoazophenyl porphyrin or reaction of borylated porphyrin with dibromoazophenyl dipyrrin, and the corresponding porphyrin-Bodipy derivatives were obtained by subsequent boron complexation. The cyclic porphyrin-dipyrrin compound 3Ni was confirmed by X-ray diffraction. The low fluorescence quantum yields of azobenzene bridged porphyrin-Bodipy can be ascribed to the presence of the intramolecular charge transfer state.
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