Tuneable near white-emissive two-dimensional covalent organic frameworks View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2018-06-13

AUTHORS

Xing Li, Qiang Gao, Juefan Wang, Yifeng Chen, Zhi-Hui Chen, Hai-Sen Xu, Wei Tang, Kai Leng, Guo-Hong Ning, Jishan Wu, Qing-Hua Xu, Su Ying Quek, Yixin Lu, Kian Ping Loh

ABSTRACT

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. More... »

PAGES

2335

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41467-018-04769-6

DOI

http://dx.doi.org/10.1038/s41467-018-04769-6

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1104468756

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/29899332


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