Aggregation effects on the structure and optical properties of a model PPV oligomer

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dc.contributor.advisor Poly(phenylene vinylene) and derivative en_US Collison, Christopher en_US Treemaneekarn, Varaporn en_US Oldham, W. en_US Hsu, John en_US Rothberg, Lewis en_US 2006-07-19T19:32:57Z en_US 2006-07-19T19:32:57Z en_US 2001-03-15 en_US
dc.identifier.citation Synthetic Metals 119N1 (2001) 515-518 en_US
dc.identifier.issn 0379-6779 en_US
dc.identifier.uri en_US
dc.description.abstract We report the effects of solvent-induced aggregation on photoluminescence spectra, decay dynamics and quantum yield in trimers of MEH-PPV and compare these to analogous experiments on the high molecular weight polymer. Nuclear magnetic resonance spectra imply that torsional motion is quenched by aggregation leading to a conjugation length increase that explains red shifts in the photoluminescence. We ascribe reduction of fluorescence quantum yield to interchain effects and observe anomalously long-lived luminescence ascribed to geminate recombination of polaron pairs. The decay dynamics suggest that, unlike the polymer case, we are able to time resolve the formation of polaron pairs in the aggregate trimer. en_US
dc.description.sponsorship We are grateful for support by ARO MURI grant DAAD1999-1-0206 and NSF grant CHE-9120001. en_US
dc.format.extent 37365 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher Elsevier: Synthetic Metals en_US
dc.subject Nuclear magnetic resonance spectroscopy en_US
dc.subject Photoluminescence en_US
dc.title Aggregation effects on the structure and optical properties of a model PPV oligomer en_US
dc.type Abstract en_US

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