Synthesis and characterization of three amino-functionalized metal–organic frameworks based on the 2-aminoterephthalic ligand

Yang, Ying and Lin, Rijia and Ge, Lei ORCID: https://orcid.org/0000-0003-2989-0329 and Hou, Lei and Bernhardt, Paul and Rufford, Thomas E. and Wang, Shaobin and Rudolph, Victor and Wang, Yaoyu and Zhu, Zhonghua (2015) Synthesis and characterization of three amino-functionalized metal–organic frameworks based on the 2-aminoterephthalic ligand. Dalton Transactions, 44 (17). pp. 8190-8197. ISSN 1477-9226


Abstract

The incorporation of Lewis base sites and open metal cation sites into metal-organic frameworks (MOFs) is a potential route to improve selective CO2 adsorption from gas mixtures. In this study, three novel amino-functionalized metal-organic frameworks (MOFs): Mg-ABDC [Mg3(ABDC)3(DMF)4], Co-ABDC [Co3(ABDC)3(DMF)4] and Sr-ABDC [Sr(ABDC)(DMF)] (ABDC = 2-aminoterephthalate) were synthesized by solvothermal reactions of 2-aminoterephthalic acid (H2ABDC) with magnesium, cobalt and strontium metal centers, respectively. Single-crystal structure analysis showed that Mg-ABDC and Co-ABDC were isostructural compounds comprising two-dimensional layered structures. The Sr-ABDC contained a three-dimensional motif isostructural to its known Ca analogue. The amino-functionalized MOFs were characterized by powder X-ray diffraction, thermal gravimetric analysis and N2 sorption. The CO2 and N2 equilibrium adsorption capacities were measured at different temperatures (0 and 25 °C). The CO2/N2 selectivities of the MOFs were 396 on Mg-ABDC, 326 on Co-ABDC and 18 on Sr-ABDC. Both Mg-ABDC and Co-ABDC exhibit high heat of CO2 adsorption (>30 kJ mol-1). The Sr-ABDC displays good thermal stability but had a low adsorption capacity resulting from narrow pore apertures. © The Royal Society of Chemistry 2015.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version due to publisher copyright policy.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 26 Apr 2017 02:56
Last Modified: 07 Mar 2018 00:42
Uncontrolled Keywords: adsorption; chelation; cobalt; crystal structure; crystalline materials; gravimetric analysis; metals; organometallics; single crystals; thermogravimetric analysis; X ray diffraction 2-aminoterephthalic acids; equilibrium adsorption capacity; metalorganic frameworks (MOFs); single-crystal structure analysis; synthesis and characterizations; thermal gravimetric analysis; three-dimensional motifs; two-dimensional layered structures; cobalt compounds
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090401 Carbon Capture Engineering (excl. Sequestration)
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1039/C4DT03927K
URI: http://eprints.usq.edu.au/id/eprint/31136

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