Hydrogen-bond change-associated gas adsorption in inorganic-organic hybrid microporous crystals

S. Onishi, T. Ohmori, Takahiro Ohkubo, H. Noguchi, L. Di, Y. Hanzawa, H. Kanoh, K. Kaneko

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

CO2 is almost vertically adsorbed and desorbed at 0.0106-0.0073 relative pressure at 273 K, respectively, on the pre-evacuated Cu-complex crystals which have no open micropores from the crystallographic structures. These vertical adsorption and desorption steps are named gate effects. Here, guest water molecules are evolved during the pre-evacuation at 373 K and the crystal structure with X-ray diffraction examination does not change due to pre-evacuation. The X-ray diffraction patterns also show no change before and after the steps. The adsorption/desorption gate effects and the remarkable hysteresis are explained in terms of the molecular valve model stemming from the reorientation of the bending vibration of the hydrogen bonding. This model can explain the observed hysteresis in the gate effect; the spring constant difference of the molecular valve for desorption and adsorption is estimated to be a similar order to that of the hydrogen bond in bulk ice.

Original languageEnglish
Pages (from-to)81-88
Number of pages8
JournalApplied Surface Science
Volume196
Issue number1-4
DOIs
Publication statusPublished - Aug 15 2002
Externally publishedYes

Fingerprint

Associated gas
Gas adsorption
Desorption
Hydrogen bonds
desorption
hydrogen bonds
Adsorption
Crystals
adsorption
Hysteresis
hysteresis
gases
crystals
X ray diffraction
bending vibration
Ice
Diffraction patterns
retraining
ice
x rays

Keywords

  • Adsorption
  • Hydrogen-bond
  • X-ray diffraction

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

Cite this

Hydrogen-bond change-associated gas adsorption in inorganic-organic hybrid microporous crystals. / Onishi, S.; Ohmori, T.; Ohkubo, Takahiro; Noguchi, H.; Di, L.; Hanzawa, Y.; Kanoh, H.; Kaneko, K.

In: Applied Surface Science, Vol. 196, No. 1-4, 15.08.2002, p. 81-88.

Research output: Contribution to journalArticle

Onishi, S, Ohmori, T, Ohkubo, T, Noguchi, H, Di, L, Hanzawa, Y, Kanoh, H & Kaneko, K 2002, 'Hydrogen-bond change-associated gas adsorption in inorganic-organic hybrid microporous crystals', Applied Surface Science, vol. 196, no. 1-4, pp. 81-88. https://doi.org/10.1016/S0169-4332(02)00048-X
Onishi, S. ; Ohmori, T. ; Ohkubo, Takahiro ; Noguchi, H. ; Di, L. ; Hanzawa, Y. ; Kanoh, H. ; Kaneko, K. / Hydrogen-bond change-associated gas adsorption in inorganic-organic hybrid microporous crystals. In: Applied Surface Science. 2002 ; Vol. 196, No. 1-4. pp. 81-88.
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AU - Onishi, S.

AU - Ohmori, T.

AU - Ohkubo, Takahiro

AU - Noguchi, H.

AU - Di, L.

AU - Hanzawa, Y.

AU - Kanoh, H.

AU - Kaneko, K.

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N2 - CO2 is almost vertically adsorbed and desorbed at 0.0106-0.0073 relative pressure at 273 K, respectively, on the pre-evacuated Cu-complex crystals which have no open micropores from the crystallographic structures. These vertical adsorption and desorption steps are named gate effects. Here, guest water molecules are evolved during the pre-evacuation at 373 K and the crystal structure with X-ray diffraction examination does not change due to pre-evacuation. The X-ray diffraction patterns also show no change before and after the steps. The adsorption/desorption gate effects and the remarkable hysteresis are explained in terms of the molecular valve model stemming from the reorientation of the bending vibration of the hydrogen bonding. This model can explain the observed hysteresis in the gate effect; the spring constant difference of the molecular valve for desorption and adsorption is estimated to be a similar order to that of the hydrogen bond in bulk ice.

AB - CO2 is almost vertically adsorbed and desorbed at 0.0106-0.0073 relative pressure at 273 K, respectively, on the pre-evacuated Cu-complex crystals which have no open micropores from the crystallographic structures. These vertical adsorption and desorption steps are named gate effects. Here, guest water molecules are evolved during the pre-evacuation at 373 K and the crystal structure with X-ray diffraction examination does not change due to pre-evacuation. The X-ray diffraction patterns also show no change before and after the steps. The adsorption/desorption gate effects and the remarkable hysteresis are explained in terms of the molecular valve model stemming from the reorientation of the bending vibration of the hydrogen bonding. This model can explain the observed hysteresis in the gate effect; the spring constant difference of the molecular valve for desorption and adsorption is estimated to be a similar order to that of the hydrogen bond in bulk ice.

KW - Adsorption

KW - Hydrogen-bond

KW - X-ray diffraction

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