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Subporphyrin Frameworks: A Missing Link Between Porphyrinoids and Porous Aromatic Networks
Liufang Zhao1, Panpan Liu1, Yuling Zhao1
1Collaborative Innovation Center of Henan Province For Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, P. R. China.
Angewandte Chemie (International Ed. in English)
|April 26, 2026
Summary
Researchers developed the first subporphyrin-based porous aromatic networks (PAF-HNU1 and PAF-HNU2) for efficient full-spectrum light harvesting. These novel materials show high catalytic efficiency for advanced oxidation reactions.
Area of Science:
- Materials Science
- Supramolecular Chemistry
- Photocatalysis
Background:
- Subporphyrins are bowl-shaped, π-conjugated macrocycles with unique photophysical properties.
- Research has focused on synthesizing complex subporphyrins, but polymeric materials are underexplored.
Purpose of the Study:
- To report the first synthesis and characterization of subporphyrin-based porous aromatic networks (PAFs).
- To investigate their potential for full-spectrum light harvesting and photocatalysis.
Main Methods:
- Solvothermal synthesis of PAF-HNU1 and PAF-HNU2 by coupling meso-functionalized subporphyrins with aromatic linkers.
- Characterization of their extended π-delocalization and light absorption properties.
- Evaluation of charge separation, transport, and catalytic activity in advanced oxidation reactions.
Main Results:
- Successful synthesis of two novel subporphyrinic PAFs (PAF-HNU1 and PAF-HNU2).
- Frameworks exhibit extended π-delocalization and strong UV-vis-NIR absorption for full-spectrum light harvesting.
- PAF-HNU2 demonstrated superior photogenerated charge separation, transport, and catalytic efficiency (2-3x higher than analogues) for advanced oxidation reactions.
Conclusions:
- Introduced a new family of subporphyrinic porous materials, bridging porphyrinoid chemistry and extended π-conjugated frameworks.
- Highlighted the potential of these metal-free materials as a platform for next-generation full-spectrum photocatalysis.
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