Elucidating heterogeneous photocatalytic superiority of microporous porphyrin organic cage

Chao Liu, Kunhui Liu, Chiming Wang, Heyuan Liu, Hailong Wang (), Hongmei Su, Xiyou Li, Banglin Chen () and Jianzhuang Jiang ()
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Chao Liu: University of Science and Technology Beijing
Kunhui Liu: Beijing Normal University
Chiming Wang: University of Science and Technology Beijing
Heyuan Liu: China University of Petroleum (East China)
Hailong Wang: University of Science and Technology Beijing
Hongmei Su: Beijing Normal University
Xiyou Li: China University of Petroleum (East China)
Banglin Chen: University of Texas at San Antonio
Jianzhuang Jiang: University of Science and Technology Beijing

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: Abstract The investigation on the catalytic properties of porous organic cages is still in an initial stage. Herein, the reaction of cyclohexanediamine with 5,15-di[3’,5’-diformyl(1,1’-biphenyl)]porphyrin affords a porphyrin tubular organic cage, PTC-1(2H). Transient absorption spectroscopy in solution reveals much prolonged triplet lifetime of PTC-1(2H) relative to monomer reference, illustrating the unique photophysical behavior of cagelike photosensitizer. The long triplet lifetime ensures high-efficiency singlet oxygen evolution according to homogeneous photo-bleach experiment, electron spin-resonance spectroscopy, and aerobic photo-oxidation of benzylamine. Furthermore, microporous supramolecular framework of PTC-1(2H) is able to promote the heterogeneous photo-oxidation of various primary amines with conversion efficiency above 99% under visible light irradiation. These results indicate the great application potentials of porous organic cages in heterogeneous phase.

Date: 2020
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DOI: 10.1038/s41467-020-14831-x

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