In situ Second-Harmonic Generation Circular Dichroism with Submonolayer Sensitivity

Alexander von Weber; Matthias Jakob; Eva Kratzer; Aras Kartouzian; Ueli Heiz

doi:10.1002/cphc.201800897

In situ Second-Harmonic Generation Circular Dichroism with Submonolayer Sensitivity

Chemphyschem. 2019 Jan 7;20(1):134-141. doi: 10.1002/cphc.201800897. Epub 2018 Nov 30.

Authors

Alexander von Weber¹, Matthias Jakob¹, Eva Kratzer¹, Aras Kartouzian¹, Ueli Heiz¹

Affiliation

¹ Chair of Physical Chemistry Chemistry Department & Catalysis Research Center, Technical University of Munich, Lichtenbergstr. 4, D-, 85748, Garching, Germany.

PMID: 30403318
DOI: 10.1002/cphc.201800897

Abstract

In this work, we present an experimental setup for the in situ and ex situ study of the optical activity of samples, which can be prepared under ultra-high vacuum (UHV) conditions by second-harmonic generation circular dichroism (SHG-CD) over a broad spectral range. The use of a racemic mixture as a qualified reference for the anisotropy factor is described and, as an example, the chiroptical properties of 1.5 μm thick (multilayers) as well as sub-monolayer thin films of the R- and S-enantiomer of 1,1'-Bi-2-naphthol (BINOL) evaporated onto BK7 substrates were investigated.

Keywords: circular dichroism; laser spectroscopy; polarized spectroscopy; second-harmonic generation; submonolayer sensitivity.

Publication types

Research Support, Non-U.S. Gov't

Grants and funding

HE 3454/21-1/DFG/International