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

Yang, Ying and Lin, Rijia and Ge, Lei 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 (15). 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 / Department / School: No Faculty
Date Deposited: 26 Apr 2017 02:56
Last Modified: 28 Apr 2017 04:00
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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