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. 2024 Dec 18;12:1502401. doi: 10.3389/fchem.2024.1502401

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Copyright © 2024 Hossain, Coe-Sessions, Ault, Gboyero, Wenzel, Dhokale, Davies, Yang, de Sousa Oliveira, Li and Hoberg.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Investigation of polymer-COF interactions by CP-HETCOR solid-state NMR spectroscopy. (A, B) ¹H-¹³C CP-HETCOR NMR spectra of a PMMA-MW (20:80 by weight) composite (A) and a PMMA-MW (20:80 by weight) physical mixture (B) showing no correlation spots between the polymer and the COF at a contact time of 40 ms. (C) ¹H-¹³C CP-HETCOR NMR spectrum of a PI-MW (50:50 by weight) composite showing a clear correlation spot (red arrow) between the polymer and the COF at a contact time of 5 ms. (D) ¹H-¹³C CP-HETCOR NMR spectrum of a PI-MW (50:50 by weight) physical mixture showing no correlation spot between the polymer and the COF at a contact time of 20 ms. permission reprinted (Neumann et al., 2024).