title: The effect of intermolecular interaction on excited states in p-DTS(FBTTH2)2.
abstract: 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.
authors.affiliation: Experimental Physics II, University of Bayreuth, 95440 Bayreuth, Germany.
authors.forename: Markus
authors.initials: M
authors.lastname: Reichenberger
authors.affiliation: Departments of Chemistry and Biochemistry and Materials, Center for Polymers and Organic Solids, University of California, Santa Barbara, California 93106, USA.
authors.forename: John A
authors.initials: JA
authors.lastname: Love
authors.affiliation: Experimental Physics II, University of Bayreuth, 95440 Bayreuth, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Rudnick
authors.affiliation: Experimental Physics II, University of Bayreuth, 95440 Bayreuth, Germany.
authors.forename: Sergey
authors.initials: S
authors.lastname: Bagnich
authors.affiliation: Experimental Physics II, University of Bayreuth, 95440 Bayreuth, Germany.
authors.forename: Fabian
authors.initials: F
authors.lastname: Panzer
authors.affiliation: School of Chemistry, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
authors.forename: Anna
authors.initials: A
authors.lastname: Stradomska
authors.affiliation: Departments of Chemistry and Biochemistry and Materials, Center for Polymers and Organic Solids, University of California, Santa Barbara, California 93106, USA.
authors.forename: Guillermo C
authors.initials: GC
authors.lastname: Bazan
authors.affiliation: Departments of Chemistry and Biochemistry and Materials, Center for Polymers and Organic Solids, University of California, Santa Barbara, California 93106, USA.
authors.forename: Thuc-Quyen
authors.initials: TQ
authors.lastname: Nguyen
authors.affiliation: Experimental Physics II, University of Bayreuth, 95440 Bayreuth, Germany.
authors.forename: Anna
authors.initials: A
authors.lastname: Köhler