Berlin 2008 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 15: Single Molecules
CPP 15.7: Vortrag
Dienstag, 26. Februar 2008, 18:30–18:45, C 230
Mesopore functionalization as highly specific tool for the control of single molecule dynamics in silica materials — •Timo Lebold1, Julia Blechinger1, Christophe Jung1, Johanna Kirstein1, Klaus Müllen2, Lea Mühlstein1, Thomas Bein1, and Christoph Bräuchle1 — 1Center for Nanoscience (CeNS), Ludwig-Maximilians-Universität München, Department of Chemistry and Biochemistry, Butenandtstraße 11, 81377 München — 2Max Planck Institute for Polymer Research, Ackermannweg 10, 55021 Mainz, Germany
Nanoporous channel systems form a class of very promising host systems in many fields of modern science. Various guests can be embedded into their nanometer-sized pores. Yet, directly influencing the diffusion dynamics of the incorporated guest molecules is not an easy task, even though a broad range of applications (e.g. drug-delivery, catalysis) could profit from this ability. Covalently attached organic functionalizations within the porous network of the silica material could be an efficient tool for realizing this aim. Hence, this study examines the influence of different functionalizations onto the diffusion dynamics of single TDI dye molecules as guests within the mesoporous network of a hexagonal thin silica film. The films were synthesized with the non-ionic Block-copolymer Brij 56 as template. Within the pores the template micelles coexist with an organic carpet of functional groups. The specific choice of this functional groups then allows for a precise tuning of the host-guest interactions and thus the guest dynamics. Furthermore this work will offer detailed mechanistic insights into the diffusion processes within a mesopore.