Anion Exchange at the Liquid/Solid Interface of Ultrathin Ionic Liquid Films on Ag(111).

ABSTRACT: Thin ionic liquid (IL) films play an important role in many applications. To obtain a better understanding of the ion distribution within IL mixture films, we sequentially deposited ultrathin layers of two ILs with the same cation but different anions onto Ag(111), and monitored their dynamic behaviour by angle-resolved X-ray photoelectron spectroscopy. Upon depositing [C₈ C₁ Im][PF₆ ] on top of a wetting layer of [C₈ C₁ Im][Tf₂ N] at room temperature (RT), we found a pronounced enrichment of the [Tf₂ N]^- anions at the IL/vacuum interface, due to a rapid anion exchange at the IL/solid interface. In contrast, at 90 K, the [Tf₂ N]^- anions remain at the IL/solid interface. Upon heatin

SUBMITTER: Lexow M 

PROVIDER: S-EPMC6282575 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature