Title
Selective Sorption of Oxygen and Nitrous Oxide by an Electron Donor-Incorporated Flexible Coordination Network
Author
Shivanna, Mohana, Jia-Jia Zheng, Keith G. Ray, Sho Lto, Hirotaka Ashitani, Yoshiki Kubota, Shogo Kawaguchi, Vitalie Stavila, Ming-Shui Yao, Takao Fujikawa, Ken-ichi Otake, and Susumu Kitagawa
Year
2023
Journal
Communications Chemistry
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- 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.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
Full Article
Instrument
FT/IR-6100
Keywords
Porous materials,Metal–organic frameworks