Berlin 2014 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

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

MO 5.7: Poster

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

Towards a Photoswitchable Matrix at the Single-Molecule Level — •Regina Schmidt1, Martti Pärs1, Tina Weller2, Mukundan Thelakkat2, and Jürgen Köhler11Experimental Physics IV and BIMF, University of Bayreuth, 95440 Bayreuth, Germany — 2Applied Functional Polymers, University of Bayreuth, 95440 Bayreuth, Germany

The demonstration of all-optical circuits, where photons replace electrons as signal carriers, is a long-standing challenge [1]. One approach is, to regulate molecular fluorescence as a function of external stimuli by controlling the efficiency of the energy transfer between a fluorescent chromophore and a bistable photochromic switch [2]. Here we investigate a matrix that is doped with photochromic dithienylcyclopentene (DCP) and into which perylene bisimide (PBI) fluorophores are embedded. The DCP molecules undergo a photo-induced transition between two isomeric states which allows to modulate the fluorescence intensity from the PBI as a function of the states of the DCP [3]. The control of the fluorescence from single PBI molecules is demonstrated.

[1] Françisco M. Raymo, Adv. Mater. 14, 401 - 414 (2002)

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

[3] M. Irie, Chem. Rev. 100, 1685 - 1716 (2000)

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