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Real-time optical and electronic sensing with a β-amino enone linked, triazine-containing 2D covalent organic framework

Kulkarni, Ranjit; Noda, Yu; Barange, Deepak K.; Kochergin, Yaroslav S.; Balcarova, Barbora; Lyu, Pengbo; Nachtigal, Petr; Bojdys, Michael J.


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&lt;p&gt;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 &amp;beta;-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 (NH&lt;sub&gt;3&lt;/sub&gt; 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.&lt;/p&gt;</subfield>
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