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Title: Selective sorption of oxygen and nitrous oxide by an electron donor-incorporated flexible coordination network
Authors: Shivanna, Mohana
Zheng, Jia-Jia
Ray, Keith G.
lto, Sho
Ashitani, Hirotaka
Kubota, Yoshiki
Kawaguchi, Shogo
Stavila, Vitalie
Yao, Ming-Shui
Fujikawa, Takao
Otake, Ken-ichi
Kitagawa, Susumu  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-6956-9543 (unconfirmed)
Author's alias: 藤川, 鷹王
大竹, 研一
北川, 進
Keywords: Coordination chemistry
Metal–organic frameworks
Porous materials
Issue Date: 4-Apr-2023
Publisher: Springer Nature
Journal title: Communications Chemistry
Volume: 6
Thesis number: 62
Abstract: Incorporating strong electron donor functionality into flexible coordination networks is intriguing for sorption applications due to a built-in mechanism for electron-withdrawing guests. Here we report a 2D flexible porous coordination network, [Ni₂(4, 4′-bipyridine)(VTTF)₂]n(1) (where H₂VTTF = 2, 2′-[1, 2-bis(4-benzoic acid)-1, 2ethanediylidene]bis-1, 3-benzodithiole), which exhibits large structural deformation from the as-synthesized or open phase (1α) into the closed phase (1β) after guest removal, as demonstrated by X-ray and electron diffraction. Interestingly, upon exposure to electron-withdrawing species, 1β reversibly undergoes guest accommodation transitions; 1α⊃O₂ (90 K) and 1α⊃N₂O (185 K). Moreover, the 1β phase showed exclusive O₂ sorption over other gases (N₂, Ar, and CO) at 120 K. The phase transformations between the 1α and 1β phases under these gases were carefully investigated by in-situ X-ray diffraction, in-situ spectroscopic studies, and DFT calculations, validating that the unusual sorption was attributed to the combination of flexible frameworks and VTTF (electron-donor) that induces strong interactions with electron-withdrawing species.
Rights: © The Author(s) 2023
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
URI: http://hdl.handle.net/2433/284593
DOI(Published Version): 10.1038/s42004-023-00853-1
PubMed ID: 37016050
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