Hannover 2013 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 2: Electronic Spectroscopy I

MO 2.5: Vortrag

Montag, 18. März 2013, 12:00–12:15, F 107

Probing chirality of surface species with SHG-ORD spectroscopy — •Tobias Lünskens, Philipp Heister, Martin Tschurl, and Ueli Heiz — Lehrstuhl für Physikalische Chemie, Technische Universität München

Chirality is a property which results out of the absence of rotoreflection symmetry in a system. As a result, chiral sytems occur in two enantiomeres which are optical active. Well known optical activity effects are circular dichroism (CD) and optical rotatory dispersion (ORD). These effects have got analogues in nonlinear optics. Therefore, surface sensitive nonlinear optical techniques, such as second harmonic generation (SHG) can be used to probe chirality of surface species.

We present a setup which allows for the discrimination between the enantiomeres of chiral surface species under UHV-conditions. The setup is evaluated on the basis of enantiomerically pure binol evaporated onto glass substrates.