Graphitic Aza-Fused π-Conjugated Networks: Construction, Engineering, and Task-Specific Applications

Hao Chen, Xian Suo, Zhenzhen Yang, Sheng Dai

Research output: Contribution to journalReview articlepeer-review

24 Scopus citations

Abstract

2D π-conjugated networks linked by aza-fused units represent a pivotal category of graphitic materials with stacked nanosheet architectures. Extensive efforts have been directed at their fabrication and application since the discovery of covalent triazine frameworks (CTFs). Besides the triazine cores, tricycloquinazoline and hexaazatriphenylene linkages are further introduced to tailor the structures and properties. Diverse related materials have been developed rapidly, and a thorough outlook is necessitated to unveil the structure–property–application relationships across multiple subcategories, which is pivotal to guide the design and fabrication toward enhanced task-specific performance. Herein, the structure types and development of related materials including CTFs, covalent quinazoline networks, and hexaazatriphenylene networks, are introduced. Advanced synthetic strategies coupled with characterization techniques provide powerful tools to engineer the properties and tune the associated behaviors in corresponding applications. Case studies in the areas of gas adsorption, membrane-based separation, thermo-/electro-/photocatalysis, and energy storage are then addressed, focusing on the correlation between structure/property engineering and optimization of the corresponding performance, particularly the preferred features and strategies in each specific field. In the last section, the underlying challenges and opportunities in construction and application of this emerging and promising material category are discussed.

Original languageEnglish
Article number2107947
JournalAdvanced Materials
Volume34
Issue number14
DOIs
StatePublished - Apr 7 2022

Funding

H.C. and X.S. contributed equally to this work. The research was supported financially by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, US Department of Energy.

Keywords

  • catalysis
  • covalent quinazoline networks
  • covalent triazine frameworks
  • energy storage
  • hexaazatrinaphthalene networks

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