Berlin 2014 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MO: Fachverband Molekülphysik

MO 5: Posters 1: Electronic Spectroscopy, Photochemistry, Femtosecond Spectroscopy

MO 5.10: Poster

Montag, 17. März 2014, 16:30–18:30, Spree-Palais

Fluorescence modulation of photochromic perylene bisimide dithienylcyclopentene triads: A quantitative model — •Martti Pärs1, Michael Gradmann1, Regina Schmidt1, Katja Gräf2, Peter Bauer2, Mukundan Thelakkat2, and Jürgen Köhler11Experimental Physics IV, University of Bayreuth, 95440 Bayreuth, Germany — 2Applied Functional Polymers, University of Bayreuth, 95440 Bayreuth, Germany

We present fluorescence modulation experiments using an organic photoswitchable triad that consists of a photochromic unit (dithienylcyclopentene, DCP) that can be interconverted between two bistable (open and closed) forms by light, and two highly efficient fluorophores (perylenebisimide, PBI) [1]. The experiments were carried out as a function of the intensities of the excitation beam that probes the fluorescence and the conversion beam that triggers the photocyclisation of the DPC. From the data we develop a kinetic model that allows us to predict quantitatively the degree of fluorescence modulation as a function of the mutual intensities of the two lasers.

[1] M. Pärs, C.C. Hofmann, K. Willinger, P. Bauer, M. Thelakkat, J. Köhler, Angew. Chem. Int. Ed. 2011, 50, 11405-11408

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2014 > Berlin