Department of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States.
Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, U.K.
J Am Chem Soc. 2020 Apr 8;142(14):6467-6471. doi: 10.1021/jacs.9b13793. Epub 2020 Mar 30.
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 g and shows stark selectivity for CO sorption over N, O, H, and CH. It displays reversible, multistep gated sorption of CO 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. -Azobenzene fills the channels in a 2 × 2 arrangement. Solid-state UV-vis spectroscopy reveals that azobenzene molecules undergo reversible - isomerization, despite being close-packed; this surprising result is confirmed by DFT-simulated UV-vis spectra.
一种大孔版本的 Mg-CUK-1 被合成出来了，它是一种具有 1-D 通道的水稳定的金属有机骨架（MOF）。Mg-CUK-1L 的 BET 表面积为 2896 m²，对 CO 吸附表现出明显的选择性，超过了 N、O、H 和 CH。它在低于 0.33 大气压的条件下显示出可逆的、多步的 CO 门控吸附。Mg-CUK-1L 的脱水单晶结构证实了开放通道结构的保留。MOF 可以通过浸入热熔体来负载有机分子，从而提供适合 X 射线衍射的单晶。-偶氮苯以 2×2 的排列方式填充通道。固态紫外可见光谱表明，尽管偶氮苯分子被紧密堆积，但仍能进行可逆的 -异构化；这一惊人的结果得到了基于密度泛函理论的模拟紫外可见光谱的证实。
