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Gluing Ionic Liquids to Oxide Surfaces: Chemical Anchoring of Functionalized Ionic Liquids by Vapor Deposition onto Cobalt(II) Oxide
Author(s) -
Xu Tao,
Waehler Tobias,
Vecchietti Julia,
Bonivardi Adrian,
Bauer Tanja,
Schwegler Johannes,
Schulz Peter S.,
Wasserscheid Peter,
Libuda Joerg
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201704107
Subject(s) - ionic liquid , oxide , nanomaterials , ionic bonding , carboxylate , cobalt oxide , electrochemistry , materials science , cobalt , electrolyte , surface modification , chemistry , chemical engineering , covalent bond , inorganic chemistry , nanotechnology , electrode , organic chemistry , catalysis , ion , engineering
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.