Highly Selective Sorption of Small Polar Molecules by a Nonporous Ionic Crystal of a Lacunary Keggin-type Heteropoly Anion and Alkali Metal Cations

Abstract

Cesium-potassium salt of the lacunary phosphotungstate Cs 6.1 K 0.9 [PW 11 O 39 ], which is a non-porous ionic solid, absorbed only water and methanol, whereas larger alcohols (C ≥ 2) and hydrocarbons were completely excluded. Cs 6.1 K 0.9 [PW 11 O 39 ] selectively removed water from waterethanol mixed gas and was reusable by vacuum treatment at room temperature. Nanostructured materials that sorb particular molecules can be used in a variety of applications, such as gas storage,

Buffer-Induced Acceleration and Inhibition in Polyoxometalate-Catalyzed Organophosphorus Ester Hydrolysis

“… Similarly, (Et 2 NH 2 ) 8 [{α-PW 11 O 39 Zr­(μ–OH)­(H 2 O)} 2 ]·7H 2 O ( 1 ) was prepared by reacting a 1:1 molar ratio of the in situ generated 2 with ZrCl 2 O·8H 2 O in an aqueous HCl solution, followed by the addition of excess amounts of solid Et 2 NH 2 Cl, as described in the literature. , The monolacunary phosphotungstate, K 7 [α-PW 11 O 39 ]·14H 2 O, was prepared via a modified version of literature procedures (detailed procedure described in the Supporting Information). , All chemicals were of commercial quality unless otherwise specified.…”

“…18,19 The monolacunary phosphotungstate, K 7 [α-PW 11 O 39 ]•14H 2 O, was prepared via a modified version of literature procedures (detailed procedure described in the Supporting Information). 53,54 All chemicals were of commercial quality unless otherwise specified.…”

A Highly Water‐Tolerant Magnesium(II) Coordination Polymer Derived from a Flexible Layered Structure

“…Based on the results of single‐vapour sorption properties, it was expected that 1 ′ could be useful for the selective removal of H 2 O from H 2 O/2‐PrOH mixtures. Therefore, we determined the vapour‐separation properties of 1 ′ for the H 2 O/2‐PrOH (1:4 w / w ) mixed vapour at 298 K. The experiment was carried out in a closed gas‐circulation system with an online gas chromatograph (GC; see the Experimental Section for a detailed explanation) . Under these conditions, the relative pressures of H 2 O and 2‐PrOH in the system were P / P 0 =0.34 and 0.23, respectively.…”

“…Based on the results of single-vapour sorption properties, it was expected that 1' could be useful for the selectiver emoval of H 2 Of rom H 2 O/2-PrOH mixtures.T herefore, we determined the vapour-separation properties of 1' for the H 2 O/2-PrOH (1:4 w/w)m ixed vapour at 298 K. The experiment wasc arriedo ut in ac losed gas-circulation system with an online gas chromatograph (GC;s ee the Experimental Section for ad etailed explanation). [23] Under these conditions, the relative pressures of H 2 Oa nd 2-PrOH in the system were P/P 0 = 0.34 and 0.23, re-spectively.C P1' efficiently separated H 2 Of rom the H 2 O/2-PrOH mixed vapour ( Figure 5). The removal rates of H 2 Oa nd 2-PrOH at the end of the first run were 96 and 0.9 %, respectively.F urthermore, the selective H 2 Oa dsorption ability of 1' was maintained over repeated cycles.…”