Zeotype Ionic Crystal of Cs_5[Cr_3O(OOCH)_6(H_2O)_3][α-CoW_(12)O_(40)]·7.5H_2O with Shape-Selective Adsorption of Water

摘要

The design and syntheses of new crystalline microstructured solid-state materials such as zeolites and their analogues have attracted much attention because of their guest inclusion properties. Aluminosilicate zeolites and their inorganic analogues with well-defined micropores show shape-selective adsorption and catalysis and have been most widely applied to the separation of C4 alkanes, oxygen from air, and water from an azeotropic mixture of water and ethanol (bp 351 K at 4.00 wt % of H_2O). There is also a great interest in the syntheses of organic zeolites with organic or organometallic building blocks. These organic zeolites can be easily functionalized at atomic and molecular levels and show unique inclusion properties. Even inorganic and organic zeolites cannot shape-selectively distinguish water from methanol and ethanol.