title: Storage and sorption properties of acetylene in jungle-gym-like open frameworks.
abstract: The acetylene-sorption properties of six porous coordination polymers (PCPs), [M(2)(L)(2)(dabco)](n) (dabco=1,4-diazabicyclo[2.2.2]octane, M=Cu(2+) (1), Zn(2+) (2), L=1,4-benzenedicarboxylate (bdc; 1 a, 2 a), 1,4-naphthalenedicarboxylate (ndc; 1 b, 2 b), 9,10-anthracenedicarboxylate (adc; 1 c, 2 c)), were investigated. The acetylene sorption isotherms of 1 and 2 measured at 195 K are of type I and show a steep increase at low relative pressures. The sorption properties of carbon dioxide at 195 K were also investigated. Compounds 1 and 2 showed a large difference in onset pressure between acetylene sorption isotherms, although the difference between the carbon dioxide sorption isotherms is not so significant. In particular, 2 c displayed a remarkable affinity for acetylene. The acetylene sorption isotherm at 298 K showed that the adsorption amounts for 2 c and 2 b at 298 K, 1 atm (101 and 106 mL g(-1), respectively) were higher than those of other conventional porous materials. Notably, of the compounds 1 and 2, the porous crystals 2 c had the highest affinity for acetylene.
authors.affiliation: Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Tanaka
authors.forename: Masakazu
authors.initials: M
authors.lastname: Higuchi
authors.forename: Satoshi
authors.initials: S
authors.lastname: Horike
authors.forename: Ryotaro
authors.initials: R
authors.lastname: Matsuda
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Kinoshita
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Yanai
authors.forename: Susumu
authors.initials: S
authors.lastname: Kitagawa