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Moon, Hoi Ri
Functional Inorganic Nanomaterials Lab for Energy
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Crystal-Size Effects on Carbon Dioxide Capture of a Covalently Alkylamine-Tethered Metal-Organic Framework Constructed by a One-Step Self-Assembly

Author(s)
Kim, Yun KyeongHyun, Sung-minLee, Jae HwaKim, Tae KyungMoon, DohyunMoon, Hoi Ri
Issued Date
2016-01
DOI
10.1038/srep19337
URI
https://scholarworks.unist.ac.kr/handle/201301/18270
Fulltext
http://www.nature.com/articles/srep19337
Citation
SCIENTIFIC REPORTS, v.6, pp.19337
Abstract
To enhance the carbon dioxide (CO2) uptake of metal-organic frameworks (MOFs), amine functionalization of their pore surfaces has been studied extensively. In general, amine-functionalized MOFs have been synthesized via post-synthetic modifications. Herein, we introduce a one-step construction of a MOF ([(NiLethylamine)(BPDC)]=MOFNH2; [NiLethylamine]2+=[Ni(C12H32N8)]2+; BPDC2-=4,4′-biphenyldicarboxylate) possessing covalently tethered alkylamine groups without post-synthetic modification. Two-amine groups per metal centre were introduced by this method. MOFNH2 showed enhanced CO2 uptake at elevated temperatures, attributed to active chemical interactions between the amine groups and the CO2 molecules. Due to the narrow channels of MOFNH2, the accessibility to the channel of CO2 is the limiting factor in its sorption behaviour. In this context, only crystal size reduction of MOFNH2 led to much faster and greater CO2 uptake at low pressures.
Publisher
NATURE PUBLISHING GROUP
ISSN
2045-2322
Keyword
CO2 CAPTUREFLUE-GASADSORPTIONADSORBENTAIRAMINES

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