Please use this identifier to cite or link to this item: https://doi.org/10.1038/s41467-018-04769-6
Title: Tuneable near white-emissive two-dimensional covalent organic frameworks
Authors: Li, Xing 
Gao, Qiang 
Wang, Juefan
Chen, Yifeng 
Chen, Zhi-Hui
Xu, Hai-Sen
Tang, Wei 
Leng, Kai 
Ning, Guo-Hong 
Wu, Jishan 
Xu, Qing-Hua 
Quek, Su Ying 
Lu, Yixin 
Loh, Kian Ping 
Keywords: Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
CRYSTALLINE
STACKING
HYDROGEN
STORAGE
Issue Date: 13-Jun-2018
Publisher: NATURE PUBLISHING GROUP
Citation: Li, Xing, Gao, Qiang, Wang, Juefan, Chen, Yifeng, Chen, Zhi-Hui, Xu, Hai-Sen, Tang, Wei, Leng, Kai, Ning, Guo-Hong, Wu, Jishan, Xu, Qing-Hua, Quek, Su Ying, Lu, Yixin, Loh, Kian Ping (2018-06-13). Tuneable near white-emissive two-dimensional covalent organic frameworks. NATURE COMMUNICATIONS 9 (1). ScholarBank@NUS Repository. https://doi.org/10.1038/s41467-018-04769-6
Abstract: © 2018 The Author(s). Most two-dimensional (2D) covalent organic frameworks (COFs) are non-fluorescent in the solid state even when they are constructed from emissive building blocks. The fluorescence quenching is usually attributed to non-irradiative rotation-related or π-π stacking-caused thermal energy dissipation process. Currently there is a lack of guiding principle on how to design fluorescent, solid-state material made of COF. Herein, we demonstrate that the eclipsed stacking structure of 2D COFs can be used to turn on, and tune, the solid-state photoluminescence from non-emissive building blocks by the restriction of intramolecular bond rotation via intralayer and interlayer hydrogen bonds among highly organized layers in the eclipse-stacked COFs. Our COFs serve as a platform whereby the size of the conjugated linkers and side-chain functionalities can be varied, rendering the emission colour-tuneable from blue to yellow and even white. This work provides a guide to design new solid-state emitters using COFs.
Source Title: NATURE COMMUNICATIONS
URI: https://scholarbank.nus.edu.sg/handle/10635/167667
ISSN: 2041-1723
2041-1723
DOI: 10.1038/s41467-018-04769-6
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