10.1002/chem.202001385
Chemistry - A European Journal
COMMUNICATION
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Figure 4. (a) UV-vis diffuse reflectance spectroscopy and (b) Plot of the
absorption difference between the protonated and the non-protonated for the
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self-condensation of bifunctional monomer with two protected
aldehyde (i.e. neopentyl acetals) and two amine groups, which
exhibited higher crystallinity, larger porosity and more regular
morphology than its counterpart BCz-COF obtained by the
unprotected monomer. The current work provides an easier and
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Furthermore, BCzP-COF exhibited obvious acidochromism
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Acknowledgements
This work was financially supported by National Natural Science
Foundation of China (51973153), National Key Research and
Development Program of China (2017YFA0207500), and the
Natural Science Foundation of Tianjin City (17JCJQJC44600).
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Keywords: bicarbazole • covalent organic framework • two-in-
one • aldehyde protection
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