Two-dimensional extended π-conjugated triphenylene-core covalent organic polymer. Issue 7 (7th January 2019)

• Record Type: Journal Article
• Authors: Ye, Xiao-Liang; Huang, Yu-Qian; Tang, Xing-Yan; Xu, Juan; Peng, Chengxin; Tan, Yuan-Zhi
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 7(2019)
• Page Start: 3066
• Page End: 3071
• Publication Date: 2019-01-07
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8ta10554e
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A covalent organic polymer with embedded triphenylene units was synthesized by Glaser–Hay cross-coupling, showing outstanding performance for lithium storage. Abstract : Carbon-rich two-dimensional (2D) materials show significant potential in energy storage and conversion applications. A conjugated 2D covalent organic polymer (COP) with embedded triphenylene (TP) units was synthesized by Glaser–Hay cross-coupling and validated by Raman, IR, XPS and NMR spectroscopy. TP-COP exhibited a uniform pore size of 5.4 Å and laminar structure with an interlayer spacing of 3.8 Å, which could be mechanically exfoliated to yield few-layered nanosheets. Interfacial polymerization produced the continuous TP-COP films from quasi-monolayer to multilayer. As the anode materials of lithium batteries, TP-COP delivered large reversible capacity up to 1624 mA h g −1, high charge rate, and good recycling ability. These properties are likely due to the presence of lithium ions in both the interspace of the expanded sp 2 moieties and the in-plane nanopores of TP-COP.