title: Why Porous Materials Have Selective Adsorptions: A Rational Aspect from Electrodynamics.
abstract: Gas storage/separation is a typical application of porous materials such as metal organic frameworks (MOFs). The adsorption/separation behavior results from the host-guest and/or guest-guest interaction and equilibration (host, porous material; guest, adsorbates). Although the driving forces for gas adsorption have been investigated, a detailed picture of interactions between gas molecules and MOFs has not clearly emerged. Herein, a new cobalt microporous MOF [Co(tipb)(adc)](DMF)3(H2O)1.5, which possesses a rare self-interpenetrated gra topology, has been prepared with both tipb and H2adc ligands (tipb = 1,3,5-tris(p-imidazolylphenyl)benzene, adc = 9,10-anthracenedicarboxylate). This MOF shows high stability and exceptional selective adsorption of CO2over N2, O2, and CH4. In particular, a theoretical assumption of a "regional dynamic electric field effect" is proposed to clarify the selective adsorption. Moreover, we suggest that the proposed effect may be one of the most important factors impacting gas separation and storage in porous materials.
authors.affiliation: School of Materials Science and Engineering, National Institute for Advanced Materialsand, TKL of Metal and Molecule-Based Material Chemistry, Nankai University , Tianjin 300350, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Chen
authors.affiliation: Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States.
authors.forename: Yuguang
authors.initials: Y
authors.lastname: Ma
authors.forename: Wei-Chao
authors.initials: WC
authors.lastname: Song
authors.affiliation: School of Materials Science and Engineering, National Institute for Advanced Materialsand, TKL of Metal and Molecule-Based Material Chemistry, Nankai University , Tianjin 300350, China.
authors.forename: Ze
authors.identifier: http://orcid.org/0000-0002-3865-2165
authors.initials: Z
authors.lastname: Chang
authors.affiliation: College of Environmental and Energy Engineering, Beijing University of Technology , Beijing, 100124, China.
authors.forename: Jian-Rong
authors.identifier: http://orcid.org/0000-0002-8101-8493
authors.initials: JR
authors.lastname: Li
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Hong-Wei
authors.identifier: http://orcid.org/0000-0003-2440-2891
authors.initials: HW
authors.lastname: Sun
authors.affiliation: Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States.
authors.forename: Perla B
authors.identifier: http://orcid.org/0000-0002-2358-3910
authors.initials: PB
authors.lastname: Balbuena
authors.affiliation: School of Materials Science and Engineering, National Institute for Advanced Materialsand, TKL of Metal and Molecule-Based Material Chemistry, Nankai University , Tianjin 300350, China.
authors.forename: Xian-He
authors.identifier: http://orcid.org/0000-0002-2646-7974
authors.initials: XH
authors.lastname: Bu