Van der Waals force modulation towards liquid processable covalent organic frameworks

Chunxai Mi; Peng peng; Haifeng Yu; Feng Huo; Hongyan He; Naisheng Jiang; Yifei Wang; Hengyang Xiang; Shengli Zhang; Haibo Zeng; Suojiang Zhang; Zhonghua Xiang

Next Materials (Mar 2023)

Van der Waals force modulation towards liquid processable covalent organic frameworks

Chunxai Mi,
Peng peng,
Haifeng Yu,
Feng Huo,
Hongyan He,
Naisheng Jiang,
Yifei Wang,
Hengyang Xiang,
Shengli Zhang,
Haibo Zeng,
Suojiang Zhang,
Zhonghua Xiang

Affiliations

Chunxai Mi: State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, PR China
Peng peng: State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, PR China; Green Catalysis Centre, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, PR China
Haifeng Yu: State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, PR China
Feng Huo: Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; Corresponding authors.
Hongyan He: Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
Naisheng Jiang: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, PR China
Yifei Wang: MIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
Hengyang Xiang: MIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
Shengli Zhang: MIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
Haibo Zeng: MIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China; Corresponding authors.
Suojiang Zhang: Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; Corresponding authors.
Zhonghua Xiang: State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, PR China; Corresponding authors.

Journal volume & issue: Vol. 1, no. 1
p. 100008

Abstract

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Covalent Organic Frameworks (COFs) have been widely developed in the fields of catalysis, energy storage, and transformation due to their excellent controllability, stability, and porosity, but the un-processable powder nature imposes limitations. Here, we report the designed synthesis of a liquid processable COF material (termed as COFNTC-Fe) in a variety of organic solvents and alkaline solutions via modulating the van der Waals force approach. Through increasing conjugate structure by extending the number of benzene rings in the reaction monomer, the newly developed COFNTC-Fe obtains lower inter-layer interactions and dissolves faster in the same solution compared with small conjugated materials, i.e., COFBTC-Fe. Our experiments along with molecular dynamics simulations reveal that the COFNTC-Fe can be more easily exfoliated to dissolve due to the smaller van der Waals force in the same solvent. Benefitting from the excellent liquid processability, the newly developed COFs can be directly added into Poly(9-vinylcarbazole) solution to form a uniform transport layer to obtain enhanced hole transport rate and more efficient blue light perovskite light-emitting diodes (perovskite LED) devices. This work, therefore, provides a new preparation approach toward liquid processable COF materials to broaden their applications.

Published in Next Materials

ISSN: 2949-8228 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology
Website: https://www.sciencedirect.com/journal/next-materials

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