title: Structural optimization of interpenetrated pillared-layer coordination polymers for ethylene/ethane separation.
abstract: With the goal of achieving effective ethylene/ethane separation, we evaluated the gas sorption properties of four pillared-layer-type porous coordination polymers with double interpenetration, [Zn2(tp)2(bpy)]n (1), [Zn2(fm)2(bpe)]n (2), [Zn2(fm)2(bpa)]n (3), and [Zn2(fm)2(bpy)]n (4) (tp = terephthalate, bpy = 4,4'-bipyridyl, fm = fumarate, bpe = 1,2-di(4-pyridyl)ethylene and bpa = 1,2-di(4-pyridyl)ethane). It was found that 4, which contains the narrowest pores of all of these compounds, exhibited ethylene-selective sorption profiles. The ethylene selectivity of 4 was estimated to be 4.6 at 298 K based on breakthrough experiments using ethylene/ethane gas mixtures. In addition, 4 exhibited a good regeneration ability compared with a conventional porous material.
authors.affiliation: Institute for Advanced and Core Technology, Showa Denko K. K. 2 Oaza Nakanosu, Oita 870-0189 (Japan).
authors.forename: Keisuke
authors.initials: K
authors.lastname: Kishida
authors.forename: Satoshi
authors.initials: S
authors.lastname: Horike
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Watanabe
authors.forename: Mina
authors.initials: M
authors.lastname: Tahara
authors.forename: Yasutaka
authors.initials: Y
authors.lastname: Inubushi
authors.forename: Susumu
authors.initials: S
authors.lastname: Kitagawa
mesh_terms: D000327:Adsorption; D005591:Chemical Fractionation / Q000379:methods*; D004980:Ethane / Q000737:chemistry / Q000302:isolation & purification*; D005030:Ethylenes / Q000737:chemistry / Q000302:isolation & purification*; D009942:Organometallic Compounds / Q000737:chemistry*; D044367:Phase Transition; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D013499:Surface Properties; D015032:Zinc / Q000737:chemistry*
chemical_list: D005030:Ethylenes; D009942:Organometallic Compounds; D011108:Polymers; C036216:ethylene; D015032:Zinc; D004980:Ethane
keywords: adsorption; guest-responsive materials; metal-organic frameworks; microporous materials; separation