Regensburg 2007 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 27: INTERNAL SYMPOSIUM Optical Spectroscopy II

CPP 27.6: Talk

Thursday, March 29, 2007, 16:15–16:30, H40

Resonant Energy Transfer Monitoring Self-Assembly of Functionalized Dye Molecules on Semiconductor Nanocrystals — •Thomas Blaudeck^1,2, Mohamed Abdel-Mottaleb², Eduard Zenkevich³, Alexander Shulga³, and Christian von Borczyskowski² — ¹POM, TU Chemnitz, 09107 Chemnitz, Germany — ²OSMP, TU Chemnitz, 09107 Chemnitz, Germany — ³Institute of Molecular and Atomic Physics, National Academy of Science, Minsk 220072, Belarus

Targeted generation of multichromophoric aggregates comprising inorganic (NCs) and organic (dye molecules) parts encounters growing interest in biology, medicine, and molecular electronics. We report on the properties of such aggregates designed from pyridyl-substituted free-base porphyrin dye molecules and CdSe NCs, formed via spontaneous self-assembly and monitored by steady-state and time-resolved spectroscopy. The results clearly identify an excitation energy transfer from the NC to the dye molecules and are discussed discussed in the framework of Stern-Volmer quenching and Förster resonant energy transfer (FRET) theory. The results are generalized on the self-assembling formation of antenna arrays comprising NCs and other classes of molecules.