Structural analysis of the microporous semiconductor K-SBC-1 during its reversible sorption of water
Journal article, 2009

The reversible sorption of water molecules in the crystalline microporous semiconductor K-SBC-1 was investigated using temperature-resolved single-crystal XRD analysis. Three crystallographic sites of adsorbed water molecules, differing in adsorption strength, were discovered in the pores of K-SBC-1. The least tightly bound is located at the centre of the {Sb12O18} tube and begins to desorb around 50°C. Above 200°C the more strongly bound water molecules rearrange from their potassium-coordinating positions to the centre of the tube, thus obtaining the characteristics of the loosely bound water, and desorb thereafter. At 240°C approximately 10% of the water has desorbed, leaving the host framework of K-SBC-1 intact. Upon re-adsorption of water at room temperature the molecules preferentially adsorb at sites in the centre of the {Sb12O18} tube. This shows that a heat treatment of 240–300°C activates K-SBC-1 for sorption and explains the observed facile desorption of water from activated samples.

host–guest system

X-ray diffraction

microporous material

semiconductor sensor


Alexander Shulman

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Vratislav Langer

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Anders Palmqvist

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Journal of Solid State Chemistry

0022-4596 (ISSN) 1095-726X (eISSN)

Vol. 182 8 2118-2121

Subject Categories

Inorganic Chemistry



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