Related Experiment Video
Updated: Jun 25, 2026
In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
Published on: February 1, 2020
In situ orientation-sensitive observation of molecular adsorption on a liquid/zeolite interface by second-harmonic
Monique A van der Veen1, Ventsislav K Valev, Thierry Verbiest
1Center for Surface Chemistry and Catalysis, Kasteelpark 23, Box 2461, K.U. Leuven, Leuven, Belgium. monique.vanderveen@biw.kuleuven.be
Abstract:
The inherently surface-specific technique of second-harmonic generation was employed to probe the adsorption of an organic molecule, a hemicyanine dye, on b-oriented silicalite-1 films in situ. Measurements were performed in a purpose-built cell for solution experiments. By measuring at two different polarization combinations of the fundamental and second-harmonic light, the orientation of the adsorbed molecules was measured continuously. It has been observed that the adsorbed molecules gradually align themselves with the straight pores of the zeolite crystallites, thus adsorbing into the pores.
