Regensburg 2019 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 17: Poster Session I
CPP 17.9: Poster
Montag, 1. April 2019, 17:30–19:30, Poster B1
Structure of Ionic Liquid Mesophases inside Nanopore Confinement — •Andre Ultes1, Julian Mars1,2, Kathrin Sentker3, Milena Lippmann4, Forian Bertram4, Patrick Huber3, and Markus Mezger1,2 — 1Max Planck Institute for Polymer Research, Mainz — 2Institute of Physics, Johannes Gutenberg University Mainz — 3Institute of Materials Physics and Technology, Hamburg University of Technology — 4DESY Photon Science, Hamburg
Ionic liquids composed of cations with long aliphatic side chains exhibit so-called microphase separation leading to structural heterogeneities on the nanometer length scale. Depending on their molecular structure, short range order as well as thermodynamically metastable and stable liquid crystalline (LC) mesophases have been observed [1]. Interfaces can strongly affect their phase stability and relative orientation [2]. In this work, the orientation and phase behavior of [C22C1im]+ [NTf2]− inside anodized aluminum oxide (AAO) nanopores was investigated by X-ray scattering. Here, confinement can stabilize phases not observed in bulk. Depending on pore diameter and surface functionalization different orientations of the LC director relative to the pore axes were observed.
[1] H. Weiss et al., J. Phys. Chem. B, 121, 620 (2017).
[2] J. Mars et al., Phys. Chem. Chem. Phys., 19, 26651 (2017).