On July 29, 2020, Kang, Chengjun; Zhang, Zhaoqiang; Wee, Vanessa; Usadi, Adam K.; Calabro, David C.; Baugh, Lisa Saunders; Wang, Shun; Wang, Yuxiang; Zhao, Dan published an article.Electric Literature of 150-78-7 The title of the article was Interlayer Shifting in Two-Dimensional Covalent Organic Frameworks. And the article contained the following:
Layer-stacking structures are very common in two-dimensional covalent organic frameworks (2D COFs). While their structures are normally determined under solvent-free conditions, the structures of solvated 2D COFs are largely unexplored. We report herein the in situ determination of solvated 2D COF structures, which exhibit an obvious difference as compared to that of the same COF under dried state. Powder X-ray diffraction (PXRD) data analyses, computational modeling, and Pawley refinement indicate that the solvated 2D COFs experience considerable interlayer shifting, resulting in new structures similar to the staggered AB stacking, namely, quasi-AB-stacking structures, instead of the AA-stacking structures that are usually observed in the dried COFs. We attribute this interlayer shifting to the interactions between COFs and solvent mols., which may weaken the attraction strength between adjacent COF layers. D. functional theory (DFT) calculations confirm that the quasi-AB stacking is energetically preferred over the AA stacking in solvated COFs. All four highly crystalline 2D COFs examined in the present study exhibit considerable interlayer shifting upon solvation, implying the universality of the solvent-induced interlayer stacking rearrangement in 2D COFs. These findings prompt re-examination of the 2D COF structures in solvated state and suggest new opportunities for the applications of COF materials under wet conditions. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Electric Literature of 150-78-7
The Article related to interlayer shifting two dimensional covalent organic framework, Physical Properties of Synthetic High Polymers: Polymer Structure and other aspects.Electric Literature of 150-78-7
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