Abstract
A Cu MOF [Cu4(PMTD)2(H2O)3]·20H2O, 1, (Where PMTD is (1,4-phenylenebis(5-methyl-4H-1,2,4-triazole-3,4-diyl)bis(5-carboxylato-3,1-phenylene)bis(hydroperoxymethanide) with rare chiral Oh type of cage and dual functionalities of open metal sites and Lewis basic sites based on a designed U-shaped ligand was synthesized by hydrothermal method. It exhibits high-capacity of CO2, C2 and C3 hydrocarbon storage capacity under atmospheric pressure as well as high H2 (1.96% wt) adsorption capacity at 77K. Methane purification capacity was tested and verified step by step. Isosteric heats (Qst) study reveals that CH4 has the weakest van der Waals host- guest interactions among the seven gases at 298K. Ideal adsorbed solution theory (IAST) calculation reveals that compound 1 is more selective toward CO2, C2H6 and C3H8 over CH4 in further calculating its separation capacity, as exemplified for CO2/CH4 (50:50, 5:95), C2H6/CH4 (50:50, 5:95) or C3H8/CH4 (50:50, 5:95) binary gas mixtures. Breakthrough experiments show that 1 has a significantly higher adsorption capacity for CO2, C2H6 and C3H8 than CH4. The selective adsorption properties of 1 make it a promising candidate for methane purification.
Original language | English (US) |
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Pages (from-to) | 13181-13187 |
Number of pages | 7 |
Journal | Chemistry - A European Journal |
Volume | 24 |
Issue number | 50 |
DOIs | |
State | Published - Feb 19 2018 |
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CCDC 1549573: Experimental Crystal Structure Determination : catena-[tetrakis(mu-5,5'-{1,4-phenylenebis[(5-methyl-4H-1,2,4-triazole-3,4-diyl)]}di(benzene-1,3-dicarboxylato))-hexa-aqua-octa-copper(ii) tetracontahydrate]
Meng, L. (Creator), Niu, Z. (Creator), Liang, C. (Creator), Dong, X. (Creator), Liu, K. (Creator), Li, G. (Creator), Li, C. (Creator), Han, Y. (Creator), Shi, Z. (Creator), Feng, S. (Creator), Meng, L. (Creator), Niu, Z. (Creator), Liang, C. (Creator), Liu, K. (Creator), Li, G. (Creator), Li, C. (Creator), Shi, Z. (Creator) & Feng, S. (Creator), Cambridge Crystallographic Data Centre, May 13 2017
DOI: 10.5517/ccdc.csd.cc1p0g7d, http://hdl.handle.net/10754/663994
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