Li, Y., Tao, S., Chen, Y., Ye, X., Shao, H., Lin, M., Zhi, Y., & Jiang, D. (2025). Crystalline, Porous Figure‐Eight‐Noded Covalent Organic Frameworks. Angewandte Chemie International Edition, 64(15). Portico. https://doi.org/10.1002/anie.202425103
Abstract:
Figure‐eight macrocycles represent a fascinating class of π‐conjugated units characterized by unique aesthetics and non‐contact molecular crossing at the center. Despite progress in synthesis over the past century, research into inorganic, organic, and polymeric figure‐eight materials remains in its infancy. Here we report the first examples of figure‐eight covalent organic frameworks by condensing figure‐eight knots to create extended porous figure‐eight π architectures. A distinct feature is that polymerization interweaves figure‐eight knots into double‐decker layers, which upon supramolecular polymerization organize well‐defined layer frameworks. The figure‐eight frameworks exhibit a band gap of 2.3 eV and emit bright orange florescence with benchmark quantum yields. Remarkably, the donor‐acceptor figure‐eight skeletons convert the figure‐eight knots into reduction centers and the linkers into oxidation sites upon light irradiation, enable charge transport and accumulation through π columns, while the built‐in hydrophilic micropores allow rapid water and oxygen delivery via capillary effect. With these distinct features, the figure‐eight frameworks function as a photocatalyst to produce hydrogen peroxide at high rate and efficiency with water/saltwater, oxygen/air, and light as sole inputs. This work paves a way to a new class of molecular frameworks, underpinning the study of well‐defined figure‐eight materials to explore unprecedented structures and functions so far we untouched.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the Ministry of Education - Academic Research Fund Tier 2
Grant Reference no. : T2EP10220-0004 and T2EP10221-0012
This research / project is supported by the Ministry of Education - Academic Research Fund Tier 1
Grant Reference no. : A-0008368-00-00 and A- 0008369-00-00
This research / project is supported by the A*STAR - NA
Grant Reference no. : U2102d2004
This research / project is supported by the National Key Research and Development Program of China - NA
Grant Reference no. : 2021YFA1200401
This research / project is supported by the National Natural Science Foundation of China - NA
Grant Reference no. : 21975049
Description:
This is the peer reviewed version of the following article: Li, Y., Tao, S., Chen, Y., Ye, X., Shao, H., Lin, M., Zhi, Y., & Jiang, D. (2025). Crystalline, Porous Figure‐Eight‐Noded Covalent Organic Frameworks. Angewandte Chemie International Edition, 64(15). Portico. https://doi.org/10.1002/anie.202425103
, which has been published in final form at https://doi.org/10.1002/anie.202425103. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.