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Real-Time Optical and Electronic Sensing with a β-Amino Enone Linked, Triazine-Containing 2D Covalent Organic Framework

preprint
submitted on 09.04.2019, 22:18 and posted on 10.04.2019, 16:45 by Ranjit Kulkarni, Yu Noda, Deepak K. Barange, Yaroslav S. Kochergin, Barbora Balcarova, Pengbo Lyu, Petr Nachtigal, Michael J. Bojdys
Fully-aromatic, two-dimensional covalent organic frameworks (2D COFs) are hailed as candidates for electronic and optical devices, yet to-date few applications emerged that make genuine use of their rational, predictive design principles and permanent pore structure. Here, we present a 2D COF made up of chemoresistant β-amino enone bridges and Lewis-basic triazine moieties that exhibits a dramatic real-time response in the visible spectrum and an increase in bulk conductivity by two orders of magnitude to a chemical trigger - corrosive HCl vapours. The optical and electronic response is fully reversible using a chemical switch (NH3 vapours) or physical triggers (temperature or vacuum). These findings demonstrate a useful application of fully-aromatic 2D COFs as real-time responsive chemosensors and switches.

Funding

European Research Council (BEGMAT-678462)

History

Email Address of Submitting Author

m.j.bojdys.02@cantab.net

Institution

Humboldt-Universität zu Berlin

Country

Germany

ORCID For Submitting Author

0000-0002-2592-4168

Declaration of Conflict of Interest

No conflict of interest.

Version Notes

Under review in Nature Communications NCOMMS-19-04469A.

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