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Stable 2D Heteroporous Covalent Organic Frameworks for Efficient Ionic Conduction
Author(s) -
Xie Zhen,
Wang Bo,
Yang Zongfan,
Yang Xiao,
Yu Xiang,
Xing Guolong,
Zhang Yinghui,
Chen Long
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201909554
Subject(s) - covalent bond , ionic bonding , dbc , ionic conductivity , polyethylene glycol , covalent organic framework , chemical engineering , polymer , materials science , network covalent bonding , chemistry , polymer chemistry , nanotechnology , organic chemistry , ion , electrode , electrolyte , optoelectronics , cmos , engineering
Two‐dimensional (2D) covalent organic frameworks (COFs) feature open and ordered one‐dimensional column nanochannels which offer immense possibilities for incorporation of various guests for specific functions. However, the relatively low chemical stability of most COFs originating from the dynamic covalent linkages hinders their practical application. In this work, a highly crystalline and heteroporous dibenzo[g,p]chrysene‐based COF (DBC‐2P) was synthesized and served as a host material for ionic conduction. DBC‐2P exhibits excellent stability both in strong acid and base due to the large conjugated DBC‐based knot that reinforces the interlayer interactions. Subsequent encapsulation of linear polyethylene glycol (PEG) and PEG‐LiBF 4 salt into the nanochannels of DBC‐2P affords a hybrid material with a high ionic conductivity of 2.31×10 −3 S cm −1 . This work demonstrates an efficient post‐synthetic strategy for the development of new COF–polymer composites with intriguing properties.