title: Constant Volume Gate-Opening by Freezing Rotational Dynamics in Microporous Organically Pillared Layered Silicates.
abstract: Microporous organically pillared layered silicates (MOPS) are a class of microporous hybrid materials that, by varying pillar density, allows for optimization of guest recognition without the need to explore different framework topologies. MOPS are found to be capable of discriminating two very similar gases, carbon dioxide and acetylene, by selective gate-opening solely through quenching pillar dynamics. Contrary to conventional gate-opening in metal organic frameworks, the additional adsorption capacity is realized without macroscopic volume changes, thus avoiding mechanical stress on the framework. Of the two gases studied, only CO2can accomplish freezing of pillar dynamics. Moreover, the shape of the slit-type micropores in MOPS can easily be fine-tuned by reducing the charge density of the silicate layers. This concomitantly reduces the Coulomb attraction of cationic interlayer space and anionic host layers. Surprisingly, we found that reducing the charge density then alters the gate-opening mechanism to a conventional structural gate-opening involving an increase in volume.
authors.affiliation: Inorganic Chemistry III, University of Bayreuth , Universitätsstraße 30, 95440 Bayreuth, Germany.
authors.forename: Kilian
authors.initials: K
authors.lastname: Bärwinkel
authors.affiliation: Bavarian Polymer Institute and Inorganic Chemistry I, University of Bayreuth , Universitätsstraße 30, 95440 Bayreuth, Germany.
authors.forename: Markus M
authors.initials: MM
authors.lastname: Herling
authors.affiliation: Bavarian Polymer Institute and Inorganic Chemistry I, University of Bayreuth , Universitätsstraße 30, 95440 Bayreuth, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Rieß
authors.affiliation: Department of Chemistry and Biotechnology, School of Engineering, the University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Sato
authors.affiliation: Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University , Kyoto 615-8510, Japan.
authors.forename: Liangchun
authors.initials: L
authors.lastname: Li
authors.affiliation: Inorganic Chemistry III, University of Bayreuth , Universitätsstraße 30, 95440 Bayreuth, Germany.
authors.forename: Yamini S
authors.initials: YS
authors.lastname: Avadhut
authors.affiliation: Inorganic Chemistry III, University of Bayreuth , Universitätsstraße 30, 95440 Bayreuth, Germany.
authors.forename: Tobias W
authors.initials: TW
authors.lastname: Kemnitzer
authors.affiliation: Bavarian Polymer Institute and Inorganic Chemistry I, University of Bayreuth , Universitätsstraße 30, 95440 Bayreuth, Germany.
authors.forename: Hussein
authors.initials: H
authors.lastname: Kalo
authors.affiliation: Inorganic Chemistry III, University of Bayreuth , Universitätsstraße 30, 95440 Bayreuth, Germany.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Senker
authors.affiliation: Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University , Kyoto 615-8510, Japan.|Department of Applied Chemistry, Graduate School of Engineering, Nagoya University , School of Engineering bldg. 1, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
authors.forename: Ryotaro
authors.initials: R
authors.lastname: Matsuda
authors.affiliation: Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University , Kyoto 615-8510, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Kitagawa
authors.affiliation: Bavarian Polymer Institute and Inorganic Chemistry I, University of Bayreuth , Universitätsstraße 30, 95440 Bayreuth, Germany.
authors.forename: Josef
authors.identifier: 0000-0002-2547-3950
authors.initials: J
authors.lastname: Breu