TY - JOUR
T1 - Molecular motion in the nanospace of MOFs upon gas adsorption investigated by in situ Raman spectroscopy
AU - Kusaka, Shinpei
AU - Nakajima, Yasuaki
AU - Hori, Akihiro
AU - Yonezu, Akira
AU - Kikushima, Kenta
AU - Kosaka, Wataru
AU - Ma, Yunsheng
AU - Matsuda, Ryotaro
N1 - Funding Information:
This work was supported by the PRESTO (Grant No. JPMJPR141C) and CREST (Grant No. JPMJCR17I3) of the Japan Science and Technology Agency (JST), and JSPS KAKENHI Grant Numbers JP16H06032, JP17H03122, JP18K14043, JP18K05145, and JP19H02734.
Publisher Copyright:
© 2021 The Royal Society of Chemistry.
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
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U2 - 10.1039/d0fd00002g
DO - 10.1039/d0fd00002g
M3 - Article
C2 - 33108427
AN - SCOPUS:85100329243
SN - 1364-5498
VL - 225
SP - 70
EP - 83
JO - Faraday Discussions
JF - Faraday Discussions
ER -