title: A Cationic MOF with High Uptake and Selectivity for CO2 due to Multiple CO2 -Philic Sites.
abstract: The reaction of N-rich pyrazinyl triazolyl carboxyl ligand 3-(4-carboxylbenzene)-5-(2-pyrazinyl)-1H-1,2,4-triazole (H2 cbptz) with MnCl2 afforded 3D cationic metal-organic framework (MOF) [Mn2 (Hcbptz)2 (Cl)(H2 O)]Cl⋅DMF⋅0.5 CH3 CN (1), which has an unusual (3,4)-connected 3,4T1 topology and 1D channels composed of cavities. MOF 1 has a very polar framework that contains exposed metal sites, uncoordinated N atoms, narrow channels, and Cl(-) basic sites, which lead to not only high CO2 uptake, but also remarkably selective adsorption of CO2 over N2 and CH4 at 298-333 K. The multiple CO2 -philic sites were identified by grand canonical Monte Carlo simulations. Moreover, 1 shows excellent stability in natural air environment. These advantages make 1 a very promising candidate in post-combustion CO2 capture, natural-gas upgrading, and landfill gas-purification processes.
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, of the Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry & Materials Science, Northwest University, Xi'an 710069 (P. R. China).
authors.forename: Hai-Hua
authors.initials: HH
authors.lastname: Wang
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, of the Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry & Materials Science, Northwest University, Xi'an 710069 (P. R. China).
authors.forename: Wen-Juan
authors.initials: WJ
authors.lastname: Shi
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, of the Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry & Materials Science, Northwest University, Xi'an 710069 (P. R. China). lhou2009@nwu.edu.cn.
authors.forename: Lei
authors.initials: L
authors.lastname: Hou
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, of the Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry & Materials Science, Northwest University, Xi'an 710069 (P. R. China).
authors.forename: Gao-Peng
authors.initials: GP
authors.lastname: Li
authors.affiliation: School of Chemical Engineering, The University of Queensland, Brisbane 4072 (Australia).
authors.forename: Zhonghua
authors.initials: Z
authors.lastname: Zhu
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, of the Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry & Materials Science, Northwest University, Xi'an 710069 (P. R. China).
authors.forename: Yao-Yu
authors.initials: YY
authors.lastname: Wang
keywords: N,O ligands; carbon dioxide capture; manganese; metal-organic frameworks; microporous materials