Stuttgart 2012 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 8: Photochemistry

MO 8.1: Vortrag

Dienstag, 13. März 2012, 10:30–10:45, V38.02

Single-molecule studies of photoswitchable organic triads — •Regina Schmidt¹, Martti Pärs¹, Christiane Hofmann¹, Peter Bauer², Mukundan Thelakkat², and Jürgen Köhler¹ — ¹Experimental Physics IV, University of Bayreuth, 95440 Bayreuth, Germany — ²Applied Functional Polymers, University of Bayreuth, 95440 Bayreuth, Germany

We have investigated a triad, consisting of two perylenebisimide (PBI) fluorophores that are covalently linked to a photochromic dithienylcyclopentene (DCP) unit [1]. Converting the DCP between its two isomeric forms allows to modulate the PBI emission intensity of up to 80% of the signal level. Exploiting these features we have demonstrated on the ensemble level the potential of these triads to act as an optical transistor [2]. Here we will communicate our first steps to expand these experiments to the single-molecule level.

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

[2] M. Pärs, Angew. Chem. Int. Ed. 50, 11405-11408 (2011).