Dresden 2017 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 90: Surface Dynamics: Experiments

O 90.4: Vortrag

Donnerstag, 23. März 2017, 11:15–11:30, WIL C107

Surface Phase Behavior of [PPh4][Tf2N] / Cs[Tf2N]- and [PPh4][Tf2N] / Ni[Tf2N]2 Low-Temperature Molten Salt MixturesPatrick Schreiber1, Marlene Scheuermeyer2, •Radha G. Bhuin1, Peter Wasserscheid2, Hans-Peter Steinrück1, and Florian Maier11Lehrstuhl für Physikalische Chemie II, FAU, Erlangen, Germany — 2Lehrstuhl für Chemische Reaktionstechnik, FAU, Erlangen, Germany

We report on surface investigations using a new class of organic/inorganic molten salt mixtures based on a [PPh4][Tf2N] compound. Depending on composition, these mixtures combine low melting points with exceptionally high thermal stability, and thus, exhibit considerably enlarged reaction windows compared to conventional ionic liquids.[1] To elucidate their surface behavior, temperature-dependent angle-resolved XPS investigations were performed using our unique spectrometer DASSA (Dual Analyzer System for Surface Analysis).[2] The DASSA comprises an UHV chamber equipped with two electron analyzers for simultaneous electron detection at 0° and 80°. We follow temperature-induced changes in bulk and surface composition for mixtures of [PPh4][Tf2N]/Cs[Tf2N] and [PPh4][Tf2N]/Ni[Tf2N]2. Interestingly, the Cs-containing mixture in the liquid state favors the presence of [Cs]+ at the surface on expense of the bulky [PPh4]+ ions. RGB and HPS thank the ERC for financial support through an Advanced Investigator Grant to HPS. References: [1] Scheuermeyer et al., New J. Chem., 40, 7157, 2016. [2] Niedermaier et al., Rev. Sci. Instrum., 87, 045105, 2016.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2017 > Dresden