Influence of ionic liquid composition on surface enrichment of fluorine-free Ru complexes.

ABSTRACT: Tailoring the surface composition of ionic liquids (ILs) is a key strategy for enhancing the performance of supported ionic liquid phase (SILP) catalysts. Here, we investigate the interfacial behavior of fluorine-free Ru polypyridyl complexes functionalized with n-nonyl side chains (Ru-C₉) dissolved in two ILs with contrasting physicochemical properties, such as hydrophobicity and surface tension, namely [C₄C₁Im][PF₆] and [C₄C₁Im][OAc]. Using angle-resolved X-ray photoelectron spectroscopy (ARXPS), we show that Ru-C₉ complexes undergo pronounced surface enrichment in [C₄C₁Im][PF₆], adopting a buoy-like orientation at the IL/vacuum interface. Surface saturation is achieved at

SUBMITTER: Ceccatto A 

PROVIDER: S-EPMC12481246 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature