Three-Dimensional Covalent Organic Frameworks with jcg Topology Based on a Trinodal Strategy
Year: 2025
Type: article
Abstract: The development of three-dimensional (3D) covalent organic frameworks (COFs) holds significant promise for various applications, but the conventional uninodal or binodal design strategies limit their structural diversity. In this work, we present a novel trinodal strategy for the synthesis of 3D COFs featuring both microporous and mesoporous nanochannels. Using powder X-ray diffraction (PXRD), computational simulations, and high-resolution transmission electron microscopy (HR-TEM), we demonstrate that employing an 8-c building block with reduced symmetry, which can be considered as 4- and 3-connected subunits, along with planar 4-c building blocks, results in an unprecedented [4 + 3 + 4]-c jcg net. This structure features rare saddle-shaped eight-membered rings and mirror-symmetrical chains. Furthermore, the incorporation of chromophore pyrene and redox-active triphenylamine components, coupled with structural conjugation, imparts tunable photophysical and electronic properties to these COFs, making them promising candidates for photocatalytic H 2 O 2 production. This work highlights the potential of the trinodal strategy in creating intricate COF architectures and enhances their applicability in heterogeneous photocatalysis.
DOI: 10.1021/jacs.5c00961
Institutions: Jilin University, State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, University of Shanghai for Science and Technology, Xi'an Jiaotong University, National University of Singapore, Centre National de la Recherche Scientifique, École Nationale Supérieure d'Ingénieurs de Caen, Chinese Academy of Sciences, Laboratoire Catalyse et Spectrochimie, Qingdao Institute of Bioenergy and Bioprocess Technology, Université de Caen Normandie
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Funders: National Natural Science Foundation of China, China Postdoctoral Science Foundation, Jilin University, Education Department of Jilin Province, Higher Education Discipline Innovation Project, National Key Research and Development Program of China, Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center)
OpenAlex ID: W4409258723