SurfaceScience21 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 39: Poster Session III: Poster to Mini-Symposium: Free-standing functional molecular 2D materials I
O 39.3: Poster
Dienstag, 2. März 2021, 10:30–12:30, P
Ru(II) polypyridine nanomembranes by low-energy electron irradiation of SAMs — •Maria Küllmer1, Felix Herrmann-Westendorf1,3, Stefan Götz2, Christof Neumann1, Patrick Endres2, Rebecka Gläßner1, Andreas Winter2, Ulrich Sigmar Schubert2,4, Benjamin Dietzek1,3,4, and Andrey Turchanin1,4 — 1Institute of Physical Chemistry, Friedrich Schiller University Jena, Germany — 2Institute of Organic Chemistry and Makromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Germany — 3Leibniz Institute of Photonic Technology e. V., Jena, Germany — 4Center for Energy and Environmental Chemistry Jena (CEEC Jena), Germany
Artificial photosynthesis is of great importance for the development of sustainable energy sources. Due to their unique chemical and physical properties molecular 2D materials are highly promising building blocks to this end. Here we present two different concepts for the introduction of the Ru(II) polypyridine photosensitizers into Carbon Nanomembranes (CNMs) - a molecular nanosheet generated by electron irradiation induced cross-linking of self-assembled monolayers (SAMs). The photoactive units are either incorporated into the SAMs before or covalently attached after the crosslinking. We characterize the developed molecular nanosheets using high-resolution X-ray photoelectron spectroscopy and surface-enhanced Raman scattering. The combination of atomic force and scanning electron microscopy shows the formation of 2D nanomembranes. Photothermal deflection spectroscopy (PDS) is employed to characterize the absorption properties.