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DOE OSTI · 2422608

A Porous Crystalline Nitrone-Linked Covalent Organic Framework

Kurandina, Daria·Huang, Banruo·Xu, Wentao·Hanikel, Nikita·Darù, Andrea·Stroscio, Gautam D.·Wang, Kaiyu·Gagliardi, Laura·Toste, F. Dean·Yaghi, Omar M.
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Abstract

Herein, we report the synthesis of a nitrone-linked covalent organic framework, COF-115, by combining N, N', N', N'''-(ethene-1, 1, 2, 2-tetrayltetrakis(benzene-4, 1-diyl))tetrakis(hydroxylamine) and terephthaladehyde via a polycondensation reaction. In this study, the formation of the nitrone functionality was confirmed by solid-state 13 C multi cross-polarization magic angle spinning NMR spectroscopy of the 13 C-isotope-labeled COF-115 and Fourier-transform infrared spectroscopy. The permanent porosity of COF-115 was evaluated through low-pressure N 2 , CO 2 , and H 2 sorption experiments. Water vapor and carbon dioxide sorption analysis of COF-115 and the isoreticular imine-linked COF indicated a superior potential of N-oxide-based porous materials for atmospheric water harvesting and CO 2 capture applications. Density functional theory calculations provided valuable insights into the difference between the adsorption properties of these COFs. Lastly, photoinduced rearrangement of COF-115 to the associated amide-linked material was successfully demonstrated.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRYChemistryatmospheric water harvestingcovalent organic frameworkslight rearrangementnitrone

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Kurandina, Daria, Huang, Banruo, Xu, Wentao, Hanikel, Nikita, Darù, Andrea, Stroscio, Gautam D., Wang, Kaiyu, Gagliardi, Laura, Toste, F. Dean, Yaghi, Omar M.. 2023-07-13. A Porous Crystalline Nitrone-Linked Covalent Organic Framework. https://doi.org/10.1002/anie.202307674

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