Hybrid organic–inorganic materials. Preparation and properties of dibenzo-18-crown-6 ether-bridged polysilsesquioxanes

Abstract

The complexation of alkali metal cations (Na⁺ and/or K⁺) by organic–inorganic hybrid materials incorporating dibenzo-18-crown-6 ether moieties covalently linked to silica by two Si–C bonds is explained in terms of deformations of the crown ether moiety during the sol–gel process

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