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Spectroscopy and Transport of the Triplet Exciton in a Terthiophene End-Capped Poly(phenylene ethynylene)
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Section:Abstract
Triplet states of poly(phenylene ethynylene), 3PPE*, not easily formed by direct photoexcitation, were produced by pulse radiolysis in toluene, along with triplet states of T3PPE having terthiophene end-caps. Intense triplet−triplet absorption maxima, ε680(3PPE*) = 9.5 × 104 M-1 cm-1 and ε780(3T3PPE*) = 2.8 × 104 M-1 cm-1 enable identification of these two species, which have triplet energies of 2.12 and 1.77 eV determined in bimolecular energy transfer equilibria. Bleaching of ground-state absorption measures 3PPE* to be the delocalized over a 1.8-nm length. Triplet states formed in the PPE chains were transported to and trapped by the end caps in a time 
5 ns.
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This article has been cited by 9 ACS Journal articles (5 most recent appear below).
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Synthesis of Monodisperse Platinum Acetylide Oligomers End-Capped with Naphthalene Diimide Units
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Julia M. Keller and Kirk S. SchanzeOrganometallics2009 28 (14), 4210-4216We report the synthesis and structural characterization of a series of monodisperse platinum acetylide oligomers with the general structure NDI-[Ph−C≡C−Pt(PBu3)2−C≡C−]n−Ph−NDI, where n = 2, 3, 6, or 10, Ph = 1,4-phenylene, NDI is a substituted 1,4,5,8-...
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History
- Published In Issue September 14, 2006
- Received February 21, 2006
Revised May 16, 2006
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