A nanographene‐based two‐dimensional covalent organic framework as a stable and efficient photocatalyst

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Jin, E, Fu, S, Hanayama, H, Addicoat, MA ORCID: https://orcid.org/0000-0002-5406-7927, Wei, W, Chen, Q, Graf, R, Landfester, K, Bonn, M, Zhang, KAI, Wang, HI, Müllen, K and Narita, A, 2021. A nanographene‐based two‐dimensional covalent organic framework as a stable and efficient photocatalyst. Angewandte Chemie International Edition. ISSN 1433-7851

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Official URL: https://doi.org/10.1002/anie.202114059

Abstract

The bottom-up synthesis of covalent organic frameworks (COFs) with desirable organic units furnishes functional materials with unique structural and chemical properties. As an emerging class of two-dimensional (2D) COFs, sp2-carbon–conjugated COFs provide a facile platform with which to construct highly stable and crystalline porous polymers with intriguing photocatalytic efficiency. However, constructing COFs with high photoconductivity and charge-carrier mobility while maintaining a sufficient photoredox potential remains a considerable challenge. Herein, a 2D vinylene-linked COF was prepared by employing nanographene, namely, dibenzo[hi,st]ovalene (DBOV), as a building block. The resulting 2D DBOV-COF exhibits unique ABC-stacked lattices, enhanced chemical stability, and a charge-carrier mobility of ~0.6 cm2·V-1·s-1 inferred from ultrafast terahertz conductivity measurements. The ABC-stacking structure was unambiguously revealed by the high-resolution transmission electron microscopy, in addition to the powder X-ray diffraction. Notably, DBOV-COF demonstrated remarkably high photocatalytic activity in hydroxylation, which was attributed to the exposure of narrow-energy-gap DBOV cores as active sites in the COF pores, in conjunction with efficient charge transport following light absorption.

Item Type:	Journal article
Publication Title:	Angewandte Chemie International Edition
Creators:	Jin, E., Fu, S., Hanayama, H., Addicoat, M.A., Wei, W., Chen, Q., Graf, R., Landfester, K., Bonn, M., Zhang, K.A.I., Wang, H.I., Müllen, K. and Narita, A.
Publisher:	Wiley
Date:	6 December 2021
ISSN:	1433-7851
Identifiers:	Number Type 10.1002/anie.202114059 DOI 1508581 Other
Rights:	This is the peer reviewed version of the following article: Jin, E., Fu, S., Hanayama, H., Addicoat, M. A., Wei, W., Chen, Q., Graf, R., Landfester, K., Bonn, M., Zhang, K.A.I., Wang, H., Müllen, K., Narita, A. (2021). A nanographene‐based two‐dimensional covalent organic framework as a stable and efficient photocatalyst. Angewandte Chemie International Edition, which has been published in final form at https://doi.org/10.1002/anie.202114059 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. © 2021 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Divisions:	Schools > School of Science and Technology
Record created by:	Linda Sullivan
Date Added:	18 Jan 2022 16:19
Last Modified:	06 Dec 2022 03:00
URI:	https://irep.ntu.ac.uk/id/eprint/45352