Molecular motion in the nanospace of MOFs upon gas adsorption investigated by in situ Raman spectroscopy.
Molecular motion in the nanospace of MOFs upon gas adsorption investigated by in situ Raman spectroscopy.
复制标题
用原位拉曼光谱研究分子在气体吸附过程中的纳米空间运动。
DOI：
10.1039/d0fd00002g
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发表时间：
2020-10
影响因子：
3.4
通讯作者：
S. Kusaka;Yasuaki Nakajima;A. Hori;Akira Yonezu;Kenta Kikushima;W. Kosaka;Yunsheng Ma;R. Matsuda
中科院分区：
文献类型：
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作者：
S. Kusaka;Yasuaki Nakajima;A. Hori;Akira Yonezu;Kenta Kikushima;W. Kosaka;Yunsheng Ma;R. Matsuda
在金属有机框架（MOFs）的纳米空间中发生的分子运动是一个有趣的研究课题，尽管尚未完全研究。在这项工作中，我们利用在超低频区域的原位拉曼光谱来研究的振动运动（包括亚苯基环的旋转运动）的MOFs，特别是[Cu 2（bdc）2（dabco）]（Cu-JAST-1），其中bdc = 1，4-benzenedicarboxylate和dabco = 1，4-diazabicyclo[2.2.2]octane。Cu-JAST-1的天平动模式被发现通过吸附各种客体分子（例如CO2、Ar和N2）而被显著抑制。此外，振动模式和吸附平衡时间之间的一个明显的相关性被确定，这提供了有用的新工具，在设计的MOFs作为分子吸附和分离材料。
Molecular motions taking place in the nanospace of metal-organic frameworks (MOFs) are an interesting research subject, although not yet fully investigated. In this work, we utilized in situ Raman spectroscopy in the ultralow-frequency region to investigate the libration motion (including the rotational motion of phenylene rings) of MOFs, in particular [Cu2(bdc)2(dabco)] (Cu-JAST-1), where bdc = 1,4-benzenedicarboxylate and dabco = 1,4-diazabicyclo[2.2.2]octane. The libration mode of Cu-JAST-1 was found to be significantly suppressed by the adsorption of various guest molecules, such as CO2, Ar, and N2. In addition, an appreciable correlation between the libration mode and adsorption equilibrium time was identified, which provides useful novel tools in the design of MOFs acting as molecular adsorption and separation materials.