Chemistry Letters, Vol.41, No.3, 331-333, 2012
Highly Selective Sorption of Small Polar Molecules by a Nonporous Ionic Crystal of a Lacunary Keggin-type Heteropoly Anion and Alkali Metal Cations
Cesium-potassium salt of the lacunary phosphotungstate Cs6.1K0.9[PW11O39), which is a nonporous ionic solid, absorbed only water and methanol, whereas larger alcohols (C >= 2) and hydrocarbons were completely excluded. Cs6.1K0.9[PW11O39] selectively removed water from water-ethanol mixed gas and was reusable by vacuum treatment at room temperature.