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- W2017477435 abstract "We report on transient photo-induced structural changes of 2,2′:5′,2′′-terthiophene (3T) adsorbed on silver nanoparticles. Surface-enhanced Raman scattering (SERS) data show that the film thickness predetermines the eventual course of these changes. In particular, for high molecular concentrations (thick adsorbate layers), illumination leads to a photoinduced polymerization of the 3T film. For thin layers (∼monolayer coverage), the photoinduced spectral evolution is qualitatively different. We interpret the latter process as a cleavage of the terthiophene molecule, resulting in isolated thiophene units. Calculations of excitation energies for 3T + 3Ag+ and 1T + Ag+ revealed visible transitions, while calculated Raman frequencies indicated 1T as a possible photoproduct. As no photoinduced transformations are observed for 3T in the solid or solution phases, it is likely that the processes reported here originate in surface-enhanced charge-transfer between the Ag-surface and the organic adsorbate." @default.
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- W2017477435 date "2006-01-01" @default.
- W2017477435 modified "2023-09-24" @default.
- W2017477435 title "Photo-induced transformations in 2,2′:5′,2′′-terthiophene thin films on silver" @default.
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- W2017477435 doi "https://doi.org/10.1039/b515379d" @default.
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