Photoinduced singlet and triplet energy transfer in fullerene-oligothiophene-fullerene triads
| Autor: | Jan C. Hummelen, Stefan C. J. Meskers, René A. J. Janssen, Joop Knol, Paul A. van Hal, B.M.W. Langeveld-Voss |
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| Přispěvatelé: | Stratingh Institute of Chemistry, Chemical Engineering and Chemistry, Institute for Complex Molecular Systems, Mechanical Engineering, Macromolecular and Organic Chemistry, Molecular Materials and Nanosystems |
| Jazyk: | angličtina |
| Rok vydání: | 2001 |
| Předmět: |
Fullerene
Absorption spectroscopy Mechanical Engineering Metals and Alloys POLYMER Condensed Matter Physics Photochemistry Electronic Optical and Magnetic Materials Photoexcitation chemistry.chemical_compound Electron transfer chemistry Mechanics of Materials Materials Chemistry Thiophene Moiety polythiophene and fullerene derivatives photoluminescence ELECTRON-TRANSFER Singlet state energy and electron transfer Triplet state photoinduced absorption spectroscopy C-60 |
| Zdroj: | Synthetic Metals, 116(1-3), 123-127. Elsevier Science Synthetic Metals, 116(1-3), 123-127. Elsevier |
| ISSN: | 0379-6779 |
| Popis: | Photophysical properties of fullerene-oligothiophene-fullerene (C60-nT-C60) triads with n = 3,6, or 9 thiophene units have been investigated using photoinduced absorption (PIA) and (time-resolved) fluorescence spectroscopy in toluene and compared to mixtures of oligothiophenes (nT) with N-methylfulleropyrrolidine (MP-C60). Photoexcitation of the oligothiophene moiety of the C60-nT-C60 triads in toluene results in a very fast singlet-energy transfer reaction to the fullerene moiety with rates varying between 1012 and 1013 s-1. In the mixtures, an inter-molecular triplet-energy transfer reaction occurs. The preference for intra- and inter-molecular energy instead of electron transfer reactions in these triads in toluene is in full agreement with predictions that can be made for the change in free energy upon charge separation. |
| Databáze: | OpenAIRE |
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