A two-dimensional conjugated polymer framework with fully sp2-bonded carbon skeleton. Issue 25 (17th May 2016)

• Record Type: Journal Article
• Authors: Zhuang, Xiaodong; Zhao, Wuxue; Zhang, Fan; Cao, Yu; Liu, Feng; Bi, Shuai; Feng, Xinliang
• Is Part Of: Polymer chemistry. Volume 7:Issue 25(2016)
• Page Start: 4176
• Page End: 4181
• Publication Date: 2016-05-17
• Subjects: Polymers -- Periodicals; Macromolecules -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1039/c6py00561f
• Languages: English
• ISSNs: 1759-9954

Abstract

Abstract : 2D conjugated COF based on olefin (CC) linkages has been readily synthesized using the Knoevenagel condensation reaction. Abstract : The synthesis of crystalline two-dimensional (2D) covalent organic frameworks (COFs) with fully unsaturated carbon–carbon backbones via a solution approach remains a great challenge. In this work, we report the first example of an olefin-linked 2D conjugated COF using a Knoevenagel polycondensation reaction of 1, 4-phenylene diacetonitrile and three armed aromatic aldehyde. The resulting 2D poly(phenelyenevinylene) framework (2DPPV) possesses a sheet morphology, and a crystalline layered structure featuring a fully sp 2 -bonded carbon skeleton with pendant cyanide groups. Its unique alternating structure with a serrated configuration has been essentially evaluated using HR-TEM TEM analysis, nitrogen physisorption measurements, PXRD studies and theoretical simulations. Upon thermal and activation treatments, the as-prepared 2DPPV can be facilely converted into porous carbon nanosheets with large specific surface areas of up to 880 m 2 g −1 which exhibit an excellent electrochemical performance as supercapacitor electrodes and electrocatalysts for the oxygen reduction reaction. This represents an economic non-template approach to 2D porous carbon materials for energy-related applications.