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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 18: Molecular Electronics and Photonics
CPP 18.10: Talk
Tuesday, March 8, 2016, 12:00–12:15, H42
The effect of intermolecular interaction on excited states in p-DTS(FBTTH2)2 — •Markus Reichenberger1,2, John A. Love3, Alexander Rudnick1,2, Sergey Bagnich1, Fabian Panzer1,2, Anna Stradomska4, Guillermo C. Bazan3, Thuc-Quyen Nguyen3, and Anna Köhler1,2 — 1Experimental Physics II — 2Bayreuth Institute of Macromolecular Research (BIMF), University of Bayreuth, 95440 Bayreuth, Germany — 3Center for Polymers and Organic Solids, Departments of Chemistry & Biochemistry and Materials, University of California, Santa Barbara, California 93106, United States — 4School of Chemistry, University of Glasgow, Glasgow G12 8QQ, United Kingdom
Using optical spectroscopy in solution and thin film, and supported by quantum chemical calculations, we investigated the aggregation process of the donor-acceptor type molecule p-DTS(FBTTH2)2. We demonstrate that cooling a solution induces a disorder-order phase transition that proceeds in three stages analogous to the steps observed in semi-rigid conjugated polymers. By analyzing the spectra we are able to identify the spectral signature of monomer and aggregate in absorption and emission. From this we find that in films the fraction of aggregates is near 100 % which is in contrast to films made from semi-rigid conjugated polymers.