Regensburg 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
DS: Fachverband Dünne Schichten
DS 13: Poster
DS 13.1: Poster
Donnerstag, 20. März 2025, 18:00–20:00, P1
Establishing Circular Dichroism Spectroscopy as predictor for CISS in molecular thin films — •Franziska Schölzel1,3, Dominik Hornig2,3, Lokesh Rasabathina1, Olav Hellwig1,3, Michael Mehring2,3, and Georgeta Salvan1,3 — 1TU Chemnitz, Institute of Physics, 09126 Chemnitz, Germany — 2TU Chemnitz, Institute for Chemistry, 09111 Chemnitz, Germany — 3TU Chemnitz, Research Center for Materials, Architectures and Integration of Nanomembranes, 09126 Chemnitz, Germany
Circular Dichroism Spectroscopy which utilizes the differential absorption of left and right circularly polarized light to distinguish between the enantiomers of a chiral molecule. Previously it has been shown that the method is able to predict the strength of the chirality induced spin selectivity (CISS) effect [1]. Although many studies show that CISS relies on the interface between a chiral molecule and a magnetic substrate, CD spectroscopy is mainly used for the analysis of molecules in solution [1]. Therefore, it is crucial to develop a method for the interpretation of CD exhibited by molecular thin films.
In this study we present a homebuilt setup to implement the analysis of thin films systems into the Jasco J-1500 CD spectrophotometer. Furthermore, we propose a way to overcome artefacts that may be caused by optical anisotropy of the film and the substrate [2].
[1] Chem. Rev. 124, 4, 1950-1991 (2024) [2] J. Am. Chem. Soc. 143, 21519-21531 (2021)
Keywords: Chirality; Circular Dichroism Spectroscopy; CISS; MIPAC; organic thin films