Journal
CRYSTAL GROWTH & DESIGN
Volume 13, Issue 11, Pages 4815-4823Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cg4009703
Keywords
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Funding
- Converging Research Center Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science, and Technology [2012001725, 2011K000675, 2012008875, 20110008018]
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ewha Womans University
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The use of five flexible alpha,omega-alkane (or alkene)-dicarboxylates (succinate (2), fumarate (3), adipate (5), and muconate (6)) produced three-dimensional (3-D) Zn-II frameworks with 1,2-bis(4-pyridyl)ethane pillars, whereas glutarate gave a two-dimensional (2-D) Zn-II compound (4). Structures 2 and 5 are 4-fold interpenetrated networks, and 3 and 6 are 5-fold interpenetrated networks. Both 5 and 6 displayed good CO2 sorption capabilities at 196 K, as evidenced by S-shape adsorption isotherms. Both compounds also exhibited selective CO2 sorption over N-2 at low temperature, while 5 containing an adipate ligand showed higher CO2 uptake at 273 and 298 K than 6 with a more rigid muconate ligand. The isosteric heats of CO2 adsorption for 5 and 6 were 23.1 kJ mol(-1) and 30.7 kJ mol(-1), respectively. A photoluminescence study showed the emissions of 2, 4, and 5 to be blue-shifted relative to both the free acids and ligand, while 3 had ligand-based luminescence properties. The thermal stabilities of these complexes were also examined.
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