Fast growth of single-crystal covalent organic frameworks for laboratory x-ray diffraction

• 成果类型: Article
• 署名作者: Han, Jing; Feng, Jie; Kang, Jia; Chen, Jie-Min; Du, Xin-Yu; Ding, San-Yuan; Liang, Lin; Wang, Wei
• 署名单位: Lanzhou University; Lanzhou University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-11447
• DOI: 10.1126/science.adk8680
• 发表日期: 2024-03-01
• 页码: 1014-1019
• 关键词: construction; catalysis

摘要

The imine-exchange strategy makes single-crystal growth of covalent organic frameworks (COFs) with large size (>15 microns) possible but is a time-consuming process (15 to 80 days) that has had limited success (six examples) and restricts structural characterization to synchrotron-radiation sources for x-ray diffraction studies. We developed a CF3COOH/CF3CH2NH2 protocol to harvest single-crystal COFs within 1 to 2 days with crystal sizes of up to 150 microns. The generality was exemplified by the feasible growth of 16 high-quality single-crystal COFs that were structurally determined by laboratory single-crystal x-ray diffraction with resolutions of up to 0.79 angstroms. The structures obtained included uncommon interpenetration of networks, and the details of the structural evolution of conformational isomers and host-guest interaction could be determined at the atomic level.