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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 102: Nanostructured Surfaces and Thin Films II: 1D and 2D Networks (joint session O/CPP)

CPP 102.6: Vortrag

Donnerstag, 19. März 2020, 16:15–16:30, WIL B321

Chirality transfer to supported metal particles and within organic dye films — •Natalie Fehn, Alexander von Weber, Matthias Jakob, Philip Stanley, Aras Kartouzian, and Ueli Heiz — Chair of Physical Chemistry, Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85748 Garching, Germany

Chirality - the absence of improper rotation axes within a structure or molecule - is a phenomenon known since the early 19th century and leads to optical activity of the substance such as optical rotatory dispersion and circular dichroism. The phenomenon plays an important role in medication, biochemistry, and fine chemicals and still opens many questions such as the origin of life. We are especially interested in the transfer of chirality from chiral surfaces to small metal particles and adsorbates, which is addressed via circular dichroism spectroscopy and second harmonic generation-circular dichroism spectroscopy. We already observed induced circular dichroism in silver nanoparticles [1] and organic dye thin films [2]. Now, the question arises whether chirality can be introduced into metal clusters which may serve as catalysts in asymmetric heterogeneous catalysis [3].

[1] M. Jakob, A. von Weber, A. Kartouzian, U. Heiz PCCP 31 (2018), 20347-20351, DOI: 10.1039/c8cp02970a. [2] A. von Weber, P. Stanley, M., Jakob, A. Kartouzian, U. Heiz J. Phys. Chem. C 14 (2019), 9255-9261, DOI: 10.1021/acs.jpcc.9b01323. [3] A. Kartouzian Chirality 31 (2019), 641-657, DOI: 10.1002/chir.23113.