title: Designed synthesis of large-pore crystalline polyimide covalent organic frameworks.
abstract: Covalent organic frameworks (COFs) are an emerging class of porous crystalline polymers with a wide variety of applications. They are currently synthesized through only a few chemical reactions, limiting the access and exploitation of new structures and properties. Here we report that the imidization reaction can be used to prepare a series of polyimide (PI) COFs with pore size as large as 42 × 53 Å(2), which is among the largest reported to date, and surface area as high as 2,346 m(2) g(-1), which exceeds that of all amorphous porous PIs and is among the highest reported for two-dimensional COFs. These PI COFs are thermally stable up to 530 °C. We also assemble a large dye molecule into a COF that shows sensitive temperature-dependent luminescent properties.
authors: Department of Chemical and Biomolecular Engineering, Center for Catalytic Science and Technology, University of Delaware, Newark Delaware 19716, USA.
authors: Qianrong
authors: Q
authors: Fang
authors: Department of Chemical and Biomolecular Engineering, Center for Catalytic Science and Technology, University of Delaware, Newark Delaware 19716, USA.
authors: Zhongbin
authors: Z
authors: Zhuang
authors: Department of Chemical and Biomolecular Engineering, Center for Catalytic Science and Technology, University of Delaware, Newark Delaware 19716, USA.
authors: Shuang
authors: S
authors: Gu
authors: Department of Chemical and Biomolecular Engineering, Center for Catalytic Science and Technology, University of Delaware, Newark Delaware 19716, USA.
authors: Robert B
authors: RB
authors: Kaspar
authors: Department of Chemical and Biomolecular Engineering, Center for Catalytic Science and Technology, University of Delaware, Newark Delaware 19716, USA.
authors: Jie
authors: J
authors: Zheng
authors: Department of Chemical and Biomolecular Engineering, Center for Catalytic Science and Technology, University of Delaware, Newark Delaware 19716, USA.
authors: Junhua
authors: J
authors: Wang
authors: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China.
authors: Shilun
authors: S
authors: Qiu
authors: Department of Chemical and Biomolecular Engineering, Center for Catalytic Science and Technology, University of Delaware, Newark Delaware 19716, USA.
authors: Yushan
authors: Y
authors: Yan