Photoexcitation dynamics in thin films of insulated molecular wires
A study is presented on how encapsulation of conjugated polymer chains affects the motion of photoexcitations and the formation of interchain aggregates in solid films. It is shown that threading of a poly(diphenylene vinylene) backbone inside insulating cyclodextrins (rotaxination) and/or complexat...
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| Published in: | Applied physics letters Vol. 89; no. 23; pp. 232110 - 232110-3 |
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| Main Authors: | , , , |
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American Institute of Physics
04-12-2006
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| Abstract | A study is presented on how encapsulation of conjugated polymer chains affects the motion of photoexcitations and the formation of interchain aggregates in solid films. It is shown that threading of a poly(diphenylene vinylene) backbone inside insulating cyclodextrins (rotaxination) and/or complexation of the chains with poly(ethylene oxide) are effective means of preventing the diffusion of excitons to nonradiative defect sites. Ultrafast time-resolved photoluminescence data reveal that excitation transfer between encapsulated chains is still possible and, for the case of rotaxination, is likely to be facilitated through close packing of end groups belonging to adjacent chains. |
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| AbstractList | A study is presented on how encapsulation of conjugated polymer chains affects the motion of photoexcitations and the formation of interchain aggregates in solid films. It is shown that threading of a poly(diphenylene vinylene) backbone inside insulating cyclodextrins (rotaxination) and/or complexation of the chains with poly(ethylene oxide) are effective means of preventing the diffusion of excitons to nonradiative defect sites. Ultrafast time-resolved photoluminescence data reveal that excitation transfer between encapsulated chains is still possible and, for the case of rotaxination, is likely to be facilitated through close packing of end groups belonging to adjacent chains. |
| Author | Herz, L. M. Anderson, H. L. Frampton, M. J. Chang, M. H. |
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| Cites_doi | 10.1126/science.293.5532.1119 10.1063/1.2196041 10.1002/1521-4095(20020418)14:8<553::AID-ADMA553>3.0.CO;2-F 10.1103/PhysRevB.61.13691 10.1021/ja973816h 10.1038/16393 10.1002/adma.200401662 10.1103/PhysRevB.70.165207 10.1021/ja973761j 10.1073/pnas.96.22.12287 10.1063/1.1468215 10.1038/nmat750 10.1103/PhysRevB.54.R8301 10.1002/chem.200305245 10.1016/j.cplett.2005.10.105 |
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| Title | Photoexcitation dynamics in thin films of insulated molecular wires |
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