Berlin 2008 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 9: POSTERS Single Molecules, Biopolymers, Membranes
CPP 9.1: Poster
Montag, 25. Februar 2008, 16:45–19:00, Poster A
Quantification of singlet-singlet annihilation in an acceptor-donor-acceptor compound at the single molecule level — •Burkhard Fückel1, Gerald Hinze1, Florian Diehl1, Fabian Nolde2, Klaus Müllen2, and Thomas Basché1 — 1Institut für Physikalische Chemie, Johannes Gutenberg-Universität, Jakob-Welder-Weg 11, 55099 Mainz, Germany — 2Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany
We have investigated a new multichromophoric compound consisting of a central perylendiimide donor (D) chromophore and two terrylendiimide acceptor (A) chromophores adjacent to it (A-D-A). After electronic excitation of the donor chromophore, energy is rapidly transferred to the acceptor chromophores. Time-resolved measurements by means of optical single molecule spectroscopy revealed that singlet-singlet annihilation (SSA) takes place upon excitation of both acceptor chromophores.
We quantitatively determined the rate of the SSA process at the single molecule level. Our approach combines the detection of photon arrival time coincidences with Monte Carlo simulations. On average the SSA rate is found to be two to three times faster than the fluorescence lifetime of terrylendiimide.