Light-Harvesting Polymers: Ultrafast Energy Transfer in Polystyrene-Based Arrays of π-Conjugated Chromophores
| Autor: | Zhuo Chen, John M. Papanikolas, Kirk S. Schanze, Erik M. Grumstrup, Alexander T. Gilligan |
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| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Quenching (fluorescence) Materials science Polymer Chromophore Photochemistry Surfaces Coatings and Films chemistry.chemical_compound Polymerization chemistry Excited state Ultrafast laser spectroscopy Materials Chemistry Copolymer Polystyrene Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Physical Chemistry B. 118:372-378 |
| ISSN: | 1520-5207 1520-6106 |
| Popis: | Energy transfer along a nonconjugated polymer chain is studied with a polystyrene-based copolymer of oligo(phenylene-ethynylene) (OPE) donor and thiophene-benzothiadiazole (TBT) acceptor pendants. The graft copolymers are prepared from reversible addition-fragmentation transfer polymerization (RAFT) and copper(I)-catalyzed azide-alkyne "click" reaction. The singlet energy transfer from donor to accept is studied via fluorescence emission and ultrafast transient absorption spectroscopy. Near unity quenching of the OPE excited state by the TBT moiety occurs on multiple time scales (2-50 ps) dependent on where the initial exciton is formed on the polymer. |
| Databáze: | OpenAIRE |
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