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Regensburg 2007 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 19: POSTER: Micro and Nano Fluidics

CPP 19.3: Poster

Wednesday, March 28, 2007, 16:00–18:30, Poster B

Raman spectroscopy on periodic mesoporous organosilica with different pore sizes — •Martin Andreas Schreiber1, Martin Güngerich1, Wolfram Heimbrodt1, Torsten Henning2, Peter Jens Klar2, Vivian Rebbin3, Michael Fröba3, Lutz Eichhorn4, Jürgen Brandner4, and Klaus Schubert41Dept. Physics and WZMW, Philipps University of Marburg, Germany — 21. Physics Institute, Justus-Liebig-University of Gießen, Germany — 3Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University of Gießen, Germany — 4Forschungszentrum Karlsruhe, IMVT, Eggenstein-Leopoldshafen, Germany

Periodic mesoporous organosilica (PMOs) are organic-inorganic hybrid materials with regular pore systems and well-defined pore sizes in the range of 3 to 15 nm yielding inner surfaces of about 1000  m2/g. Two-point attached organic units within the silica matrix in the pore walls are a genuine part of the 3D pore wall framework. These organic functionalisations is very versatile making these hybrids interesting for applications in catalysis and micro-reactor technology.

Here we study the adsorption and desorption behavior in dependence of the pore-size of benzene-functionalized and ethane-functionalized PMOs in the temperature range between 20 and 140C by Raman spectroscopy. We find significant differences in the adsorption-desorption behaviour for the solvents ethanol and benzene suggesting that PMOs make a selective separation of solvent vapours possible.

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