Berlin 2005 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 29: POSTER: Polymer physics
CPP 29.56: Poster
Dienstag, 8. März 2005, 16:30–18:30, Poster TU D
Energy transfer and trapping in light harvesting polymers — •antonio volta1, alexander blumen1, aurel jurjiu1, and thorsten koslowski2 — 1Theoretische Polymerphysik, Universität Freiburg, Hermann Herderstr. 3, D-79104 Freiburg, Germany — 2Institut für Physikalische Chemie, Universität Freiburg, Albertstr. 23a, D-79104 Freiburg, Germany
The energy transfer over polymers (such as in photosynthesis) is a topic of much interest; the subject is interdisciplinary and combines physics with biology and chemistry. In the present theoretical work we deal with light harvesting polymers (antennae) over which an energy transfer takes place from the periphery to a reactive center. The model is based on continuous time random walks (CTRWs) over dendrimers and over regular hyperbranched fractals (RHFs). We compute, thanks to analytical methods which avoid direct diagonalizations, the average probability of occupation of the starting point of the motion [1], as a function of time, for very large structures. We find clear differences between fractal (RHF) and non-fractal (dendrimer) structures.
[1] A. Blumen, A. Volta, A. Jurjiu, and Th. Koslowski; J. Luminescence, in press