Dynamic Studies of Equilibria Phenomena in Silca Sol-Gel Materials Chris Huber University of Minnesota 69th International Symposium of Molecular Spectroscopy Motivation Molecule-interface interactions Relevance Liquid Chromatography Confined Volume Shell vs. Core dynamics 1-2 nm Core Shell 2DIR Background Wavelengths Absorbed Wavelengths Emitted Echo Tw echo t3t3 213 2DIR Background Wavelengths Absorbed Wavelengths Emitted Time Sol-Gel Background TMOS TriMOS H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H HH H H H H Project Overview Samples 50 microns between two CaF 2 windows Alcogels (pentane, DMF, CHCl 3, IPA) Aerogel (originally in IPA) Porosity Solvent Accesibility Solvent Sensitivity FTIR Dynamics Porosity and Sensitivity Aerogel Xerogel Spun Type I isotherm