title: Reconstruction of Covalent Organic Frameworks by Dynamic Equilibrium.
abstract: Covalent organic frameworks (COFs) are periodic two- or three-dimensional polymeric networks with high surface areas, low density, and designed structures. Because COFs are normally prepared based on reversible formation of covalent bonds with relatively weak stability, their structures can be easily broken or damaged due to changes in the surrounding environment. Thus, developing strategies to realize the reconstruction of COFs in order to extend their usage lifetime is crucial for practical applications. In addition, exploring the kinetics of COF growth under varied reaction conditions is important for better understanding the nucleation and growth processes of COFs. In this work, the reformation mechanism of an imine-based COF using an ex situ characterization method was investigated, disclosing an interesting COF reconstruction progress from disorder to order. The present study shows the regeneration ability of COFs, and the developed method could be generalized for broader use in the field.
authors.affiliation: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371 (Singapore).
authors.forename: Qiang
authors.initials: Q
authors.lastname: Gao
authors.affiliation: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371 (Singapore).
authors.forename: Linyi
authors.initials: L
authors.lastname: Bai
authors.affiliation: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371 (Singapore).
authors.forename: Yongfei
authors.initials: Y
authors.lastname: Zeng
authors.affiliation: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371 (Singapore).
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.affiliation: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371 (Singapore).
authors.forename: Xiaojing
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871 (P. R. China). rzou@pku.edu.cn.|Singapore Peking University Research Centre for a Sustainable Low-Carbon Future, 1 Create Way, Singapore 138602 (Singapore). rzou@pku.edu.cn.
authors.forename: Ruqiang
authors.initials: R
authors.lastname: Zou
authors.affiliation: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371 (Singapore). zhaoyanli@ntu.edu.sg.|Singapore Peking University Research Centre for a Sustainable Low-Carbon Future, 1 Create Way, Singapore 138602 (Singapore). zhaoyanli@ntu.edu.sg.|School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore). zhaoyanli@ntu.edu.sg.
authors.forename: Yanli
authors.initials: Y
authors.lastname: Zhao
keywords: covalent organic frameworks; dynamic equilibrium; ex situ characterization; reconstruction; self-assembly