title: An Extremely Porous Hydrogen-Bonded Framework Composed of d-Penicillaminato Co(III)2Au(I)(3) Complex Anions and Aqua Cobalt(II) Cations: Formation and Stepwise Structural Transformation.
abstract: A unique example of a hydrogen-bonded ionic solid with a porosity of 80 %, [Co(H2O)6]3 [Co2Au3 (d-pen-N,S)6]2 (1; d-H2 pen=d-penicillamine), composed of [Co(H2O)6](2+) cations and [Co2Au3 (d-pen-N,S)6 ](3-) anions, is reported. Solid 1 was kinetically produced and was then transformed stepwise into two more thermodynamically stable solids with lower porosities, [Co(H2O)4 ][Co(H2O)6]2 [Co2Au3 (d-pen-N,S)6]2 (2) and [Co(H2O)4]3 [Co2 Au3 (d-pen-N,S)6]2 (3), through the coordination of the free carboxylate groups in [Co2Au3 (d-pen-N,S)6](3-) to Co(II) centers. Solids 1-3 were structurally characterized, and the selective adsorption of small molecules into their pores was investigated.
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan.
authors.forename: Sireenart
authors.initials: S
authors.lastname: Surinwong
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan.
authors.forename: Nobuto
authors.initials: N
authors.lastname: Yoshinari
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan.|Department of Chemistry, School of Science, University of Phayao, Phayao, 56000, Thailand.
authors.forename: Bunlawee
authors.initials: B
authors.lastname: Yotnoi
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan. konno@chem.sci.osaka-u.ac.jp.
authors.forename: Takumi
authors.initials: T
authors.lastname: Konno
keywords: X-ray diffraction; adsorption; ionic solids; porous compounds; structural transformation