Gluing Ionic Liquids to Oxide Surfaces: Chemical Anchoring of Functionalized Ionic Liquids by Vapor Deposition onto Cobalt(II) Oxide. Issue 31 (28th June 2017)

• Record Type: Journal Article
• Authors: Xu, Tao; Waehler, Tobias; Vecchietti, Julia; Bonivardi, Adrian; Bauer, Tanja; Schwegler, Johannes; Schulz, Peter S.; Wasserscheid, Peter; Libuda, Joerg
• Is Part Of: Angewandte Chemie international edition. Volume 56:Issue 31(2017)
• Page Start: 9072
• Page End: 9076
• Publication Date: 2017-06-28
• Subjects: chemical anchoring -- cobalt oxide -- ester functionalization -- ionic liquids -- vapor deposition; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201704107
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Ionic liquids (IL) hold a great potential as novel electrolytes for applications in electronic materials and energy technology. The functionality of ILs in these applications relies on their interface to semiconducting nanomaterials. Therefore, methods to control the chemistry and structure of this interface are the key to assemble new IL‐based electronic and electrochemical materials. Here, we present a new method to prepare a chemically well‐defined interface between an oxide and an IL film. An imidazolium‐based IL, which is carrying an ester group, is deposited onto cobalt oxide surface by evaporation. The IL binds covalently to the surface by thermally activated cleavage of the ester group and formation of a bridging carboxylate. The anchoring reaction shows high structure sensitivity, which implies that the IL film can be adhered selectively to specific oxide surfaces. Abstract : On the surface of it : A functionalized imidazolium‐based ionic liquid is covalently anchored to an oxide surface by deposition from the gas phase. In a highly structure‐sensitive reaction, the ionic liquid binds to the surface by thermally activated cleavage of an ester group and formation of a bridging carboxylate.