title: Micropore Formation of [Zn2(Oxac) (Taz)2]·(H2O)2.5via CO2Adsorption.
abstract: As-synthesized [Zn2(Oxac) (Taz)2]·(H2O)2.5, referred to as ZOTW2.5, was prepared from aqueous methanol solutions of Zn5(CO3)2(OH)6and two kinds of ligands of 1,2,4-triazole (Taz) and oxalic acid (Oxac) at 453 K for 12 h. The crystal structure was determined by the Rietveld method. As-synthesized ZOTW2.5was pretreated at 383 K and 1 mPa for tpth, ZOTWx(tpth). ZOTWx(≥3h) showed a type I adsorption isotherm for N2at 77 K having a saturation amount (Vs) of 180 mg/g, but that pretreated shortly showed only 1/10 in Vs. CO2was adsorbed at 303 K in sigmoid on nonporous ZOTWx(≤2h) and in Langmuir-type on ZOTWx(≥3h) to reach the adsorption amount of 120 mg/g at 700 Torr. N2adsorption on ZOTWx(≤2h)deCO2, degassed after CO2adsorption on ZOTWx(≤2h), was promoted 5-fold from 180 mg/g on ZOTWx(tpth) and ZOTWx(≥3h)deCO2up to ca. 1000 mg/g. The interaction of CO2and H2O molecules in micropores may lead to a new route for micropore formation.
authors.affiliation: Department of Chemistry, Faculty of Science, Shinshu University , 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.|Department of Chemistry, Faculty of Mathematics and Natural Science, State University of Medan , North Sumatera, Indonesia.
authors.forename: Moondra
authors.initials: M
authors.lastname: Zubir
authors.affiliation: Department of Chemistry, Faculty of Science, Shinshu University , 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
authors.forename: Atom
authors.initials: A
authors.lastname: Hamasaki
authors.affiliation: Department of Chemistry, Faculty of Science, Shinshu University , 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
authors.forename: Taku
authors.initials: T
authors.lastname: Iiyama
authors.affiliation: Department of Chemistry, Faculty of Science, Shinshu University , 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Ohta
authors.affiliation: Department of Chemistry, Faculty of Science, Shinshu University , 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ohki
authors.affiliation: Department of Chemistry, Faculty of Science, Shinshu University , 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
authors.forename: Sumio
authors.identifier: 0000-0002-6467-6718
authors.initials: S
authors.lastname: Ozeki