Thermally and photoinduced polymerization of ultrathin sexithiophene films

Journal Article · Sun Sep 14 00:00:00 EDT 2014 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.4894437· OSTI ID:22308386

Sander, Anke; Hammer, Rene; Duncker, Klaus; Förster, Stefan ^[1]; Widdra, Wolf ^[1]

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1. Institute of Physics, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 3, 06120 Halle(Saale) (Germany)

The thermally-induced polymerization of α-sexithiophene (6T) molecules on Ag(001) and Au(001) gives rise to long unbranched polymer chains or branched polymer networks depending on the annealing parameters. There, the onset temperature for polymerization depends on the strength of interaction with the underlying substrate. Similar polymerization processes are also induced by ultraviolet radiation with photon energies between 3.0 and 4.2 eV. Radical formation by an electronic excitation in the 6T molecule is proposed as the driving mechanism that necessitates the interplay with the metallic substrate.

• OSTI ID: 22308386
• Journal Information: Journal of Chemical Physics, Vol. 141, Issue 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ANNEALING
EXCITATION
FILMS
INTERACTIONS
MOLECULES
PHOTONS
POLYMERIZATION
POLYMERS
RADICALS
SUBSTRATES