title: Pore chemistry and size control in hybrid porous materials for acetylene capture from ethylene.
abstract: The trade-off between physical adsorption capacity and selectivity of porous materials is a major barrier for efficient gas separation and purification through physisorption. We report control over pore chemistry and size in metal coordination networks with hexafluorosilicate and organic linkers for the purpose of preferential binding and orderly assembly of acetylene molecules through cooperative host-guest and/or guest-guest interactions. The specific binding sites for acetylene are validated by modeling and neutron powder diffraction studies. The energies associated with these binding interactions afford high adsorption capacity (2.1 millimoles per gram at 0.025 bar) and selectivity (39.7 to 44.8) for acetylene at ambient conditions. Their efficiency for the separation of acetylene/ethylene mixtures is demonstrated by experimental breakthrough curves (0.73 millimoles per gram from a 1/99 mixture).
authors.affiliation: Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Xili
authors.initials: X
authors.lastname: Cui
authors.affiliation: Department of Chemical and Environmental Sciences, University of Limerick, Limerick, Republic of Ireland.
authors.forename: Kaijie
authors.initials: K
authors.lastname: Chen
authors.affiliation: Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China. xinghb@zju.edu.cn michael.zaworotko@ul.ie banglin.chen@utsa.edu.
authors.forename: Huabin
authors.initials: H
authors.lastname: Xing
authors.affiliation: Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Qiwei
authors.initials: Q
authors.lastname: Yang
authors.affiliation: Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands.
authors.forename: Rajamani
authors.initials: R
authors.lastname: Krishna
authors.affiliation: Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Zongbi
authors.initials: Z
authors.lastname: Bao
authors.affiliation: Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899-6102, USA.
authors.forename: Hui
authors.initials: H
authors.lastname: Wu
authors.affiliation: Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899-6102, USA.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhou
authors.affiliation: Advanced Membranes and Porous Materials Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
authors.forename: Xinglong
authors.initials: X
authors.lastname: Dong
authors.affiliation: Advanced Membranes and Porous Materials Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
authors.forename: Yu
authors.initials: Y
authors.lastname: Han
authors.affiliation: Department of Chemistry, University of Texas-San Antonio, One UTSA Circle, San Antonio, TX 78249-0698, USA.
authors.forename: Bin
authors.initials: B
authors.lastname: Li
authors.affiliation: Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Qilong
authors.initials: Q
authors.lastname: Ren
authors.affiliation: Department of Chemical and Environmental Sciences, University of Limerick, Limerick, Republic of Ireland. xinghb@zju.edu.cn michael.zaworotko@ul.ie banglin.chen@utsa.edu.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Zaworotko
authors.affiliation: Department of Chemistry, University of Texas-San Antonio, One UTSA Circle, San Antonio, TX 78249-0698, USA. xinghb@zju.edu.cn michael.zaworotko@ul.ie banglin.chen@utsa.edu.
authors.forename: Banglin
authors.initials: B
authors.lastname: Chen