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Contrasting photodynamics between C60-dithiapyrene and C60-pyrene dyads |
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| Authors: | Guldi Dirk M Spänig Fabian Kreher David Perepichka Igor F van der Pol Cornelia Bryce Martin R Ohkubo Kei Fukuzumi Shunichi |
| Institution: | 1. Institute for Physical Chemistry, Friedrich‐Alexander‐Universit?t Erlangen‐Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany, Fax: (+49)?9131‐852‐8307;2. Department of Chemistry and Centre for Molecular and Nanoscale Electronics, Durham University, Durham DH1 3LE, UK, Fax: (+44)?191‐384‐4737;3. On leave from: National Academy of Sciences of Ukraine, L.?M. Litvinenko Institute of Physical Organic and Coal Chemistry, Donetsk 83114, Ukraine;4. Department of Material and Life Science, Graduate School of Engineering, Osaka University, SORST, JAPAN Science and Technology Agency, Suita, Osaka 565‐0871, Japan |
| Abstract: | The photodynamics of a C60-dithiapyrene donor-acceptor conjugate were compared with the corresponding C60-pyrene conjugate. The photoinduced charge separation and subsequent charge recombination processes were examined by time-resolved fluorescence measurements on the picosecond timescale and transient absorption measurements on the picosecond and microsecond timescales with detection in the visible and near-infrared regions. We have observed quite long lifetimes (i.e., up to 1.01 ns) for the photogenerated charge-separated state in a C60-dithiapyrene dyad without the need for i) a long spacer between the two moieties, or ii) a gain in aromaticity in the radical ion pair. |
| Keywords: | dyads electron transfer fullerenes photodynamics pyrenes |
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