Crystal-Size Effects on Carbon Dioxide Capture of a Covalently Alkylamine-Tethered Metal-Organic Framework Constructed by a One-Step Self-Assembly.

Citation data:

Scientific reports, ISSN: 2045-2322, Vol: 6, Issue: 1, Page: 19337

Publication Year:
2016
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Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/18270
PMID:
26757890
DOI:
10.1038/srep19337
PMCID:
PMC4725930
Author(s):
Kim, Yun Kyeong; Hyun, Sung-min; Lee, Jae Hwa; Kim, Tae Kyung; Moon, Dohyun; Moon, Hoi Ri
Publisher(s):
Springer Nature; NATURE PUBLISHING GROUP
Tags:
Multidisciplinary
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article description
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+); BPDC(2-) = 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.