title: A Pyrene-Based, Fluorescent Three-Dimensional Covalent Organic Framework.
abstract: The targeted synthesis of 3D COFs has been considered challenging, especially adopting new topologies and bearing photoelectric units. Herein, for the first time, we report the synthesis and characterization of a novel 3D pyrene-based COF (3D-Py-COF), by selectively choosing the geometry of the precursors and the connection patterns. Based on X-ray diffraction measurement and detailed simulations, 3D-Py-COF is proposed to adopt a two-fold interpenetrated pts topology, which has never been reported before. In addition, 3D-Py-COF has a narrow pore size distribution and high surface area and also features selective absorption of CO2 over N2. Interestingly, due to the existence of isolated pyrene units in the 3D framework, 3D-Py-COF is the first fluorescent 3D COF and can be used in explosive detection. Our results not only show it is possible to rationally design and synthesize 3D COFs with other topologies but also demonstrate that the incorporation of photoelectric units into 3D COFs can allow the resulting materials with interesting properties.
authors.affiliation: Key Laboratory of Biomedical Polymers (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, China.
authors.forename: Guiqing
authors.initials: G
authors.lastname: Lin
authors.affiliation: Key Laboratory of Biomedical Polymers (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, China.
authors.forename: Huimin
authors.initials: H
authors.lastname: Ding
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou 350002, China.
authors.forename: Daqiang
authors.initials: D
authors.lastname: Yuan
authors.affiliation: Key Laboratory of Biomedical Polymers (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, China.
authors.forename: Baoshan
authors.initials: B
authors.lastname: Wang
authors.affiliation: Key Laboratory of Biomedical Polymers (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang