He, Junpeng, Aggarwal, Kanchan, Katyal, Naman, He, Shichao, Chiang, Edward, Dunning, Samuel G, Reynolds, Joseph EIII, Steiner, Alexander ORCID: 0000-0002-4315-6123, Henkelman, Graeme, Que, Emily L et al (show 1 more authors)
(2020)
Reversible Solid-State Isomerism of Azobenzene-Loaded Large-Pore Isoreticular Mg-CUK-1.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 142 (14).
pp. 6467-6471.
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Abstract
A large-pore version of Mg-CUK-1, a water-stable metal-organic framework (MOF) with 1-D channels, was synthesized in basic water. Mg-CUK-1L has a BET surface area of 2896 m<sup>2</sup> g<sup>-1</sup> and shows stark selectivity for CO<sub>2</sub> sorption over N<sub>2</sub>, O<sub>2</sub>, H<sub>2</sub>, and CH<sub>4</sub>. It displays reversible, multistep gated sorption of CO<sub>2</sub> below 0.33 atm. The dehydrated single-crystal structure of Mg-CUK-1L confirms retention of the open-channel structure. The MOF can be loaded with organic molecules by immersion in hot melts, providing single crystals suitable for X-ray diffraction. <i>trans</i>-Azobenzene fills the channels in a 2 × 2 arrangement. Solid-state UV-vis spectroscopy reveals that azobenzene molecules undergo reversible <i>trans</i>-<i>cis</i> isomerization, despite being close-packed; this surprising result is confirmed by DFT-simulated UV-vis spectra.
Item Type: | Article |
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Depositing User: | Symplectic Admin |
Date Deposited: | 01 Apr 2020 11:07 |
Last Modified: | 18 Jan 2023 23:56 |
DOI: | 10.1021/jacs.9b13793 |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3081304 |