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Direct measurement of the end-to-end distance of individual polyfluorene polymer chains.

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Muls, Benoît Uji-I, Hiroshi Melnikov, Sergey Moussa, Alain Verheijen, Wendy Soumillion, Jean-Philippe [UCL] Hofkens, Johan

Wide-field imaging of individual multichromophoric molecules and successive photobleaching were used to determine, accurately, the relative position of the chromophores in such systems. First, a polyphenylene dendrimer with well-defined geometry was used to establish the accuracy in localization that can be obtained by this methodology. For a signal-to-noise ratio of 20, interchromophoric distances could be measured with 4 nm accuracy. Next, the method was used to determine the end-to-end distribution of an end-capped polyfluorene polymer. From comparison between the experimental and simulated distributions, information on the conformation of the polymer could be deduced. It was found that the polymer has a nonlinear conformation. A conjugation length of six monomer units gave the best fit of the experimental data to the proposed model.

Document type Article de périodique (Journal article) – Journal Article
Publication date 2005
Journal information "Chemphyschem : a European journal of chemical physics and physical chemistry" - Vol. 6, no. 11, p. 2286-94 (2005)
Peer reviewed yes
issn 1439-4235
Publication status Publié
Affiliation UCL - SC/CHIM - Département de chimie
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Bibliographic reference Muls, Benoît ; Uji-I, Hiroshi ; Melnikov, Sergey ; Moussa, Alain ; Verheijen, Wendy ; et. al. Direct measurement of the end-to-end distance of individual polyfluorene polymer chains.. In: Chemphyschem : a European journal of chemical physics and physical chemistry, Vol. 6, no. 11, p. 2286-94 (2005)
Permanent URL http://hdl.handle.net/2078.1/10352