Linewidth-limited energy transfer in single conjugated polymer molecules

Using low temperature single molecule spectroscopy on rigid-rod conjugated polymers we are able to identify homogeneously broadened, strongly polarized emission from individual chromophore units on a single chain. Gated fluorescence spectroscopy allows real time imaging of intramolecular energy tran...

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Bibliographic Details
Published in:Physical review letters 2003-12, Vol.91 (26 Pt 1), p.267403-267403, Article 267403
Main Authors: Müller, J G, Lemmer, U, Raschke, G, Anni, M, Scherf, U, Lupton, J M, Feldmann, J
Format: Article
Language:English
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Summary:Using low temperature single molecule spectroscopy on rigid-rod conjugated polymers we are able to identify homogeneously broadened, strongly polarized emission from individual chromophore units on a single chain. Gated fluorescence spectroscopy allows real time imaging of intramolecular energy transfer as the chain behaves as a series of weakly interacting chromophores. Energy transfer is controlled by the chromophoric spectral linewidth, which depends on temperature. Linewidths exceeding intramolecular disorder lead to incoherent chromophore coupling and collective fluorescence phenomena.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.91.267403