Crystalline Polyphenylene Covalent Organic Frameworks
Xing Han, Zihui Zhou, Kaiyu Wang, Zhiling Zheng, Silvio Neumann, Heyang Zhang, Tianqiong Ma, Omar M. Yaghi
Abstract
The synthesis of crystalline polyphenylene covalent organic frameworks (COFs) was accomplished by linking fluorinated tris(4-acetylphenyl)benzene building units using aldol cyclotrimerization. The structures of the two COFs, reported here, were confirmed by powder X-ray diffraction techniques, Fourier transform infrared, and solid-state 13 C CP/MAS NMR spectroscopy. The results showed that the COFs were porous and chemically stable in corrosive, harsh environments for at least 1 week. Accordingly, postsynthetically modified derivatives of these COFs using primary amines showed CO 2 uptake from air and flue gas.
Topics & Concepts
ChemistryCovalent bondFourier transform infrared spectroscopyBenzeneCovalent organic frameworkAldol reactionPorosityInfrared spectroscopyAldol condensationPolymer chemistrySolid-stateChemical engineeringOrganic chemistryPhysical chemistryCatalysisEngineeringCovalent Organic Framework ApplicationsMetal-Organic Frameworks: Synthesis and ApplicationsLuminescence and Fluorescent Materials