Ultrafast polarized fluorescence dynamics in an organic dendrimer

Varnavski, O., Menkir, G., Goodson, T. and Burn, P. L. (2000) Ultrafast polarized fluorescence dynamics in an organic dendrimer. Applied Physics Letters, 77 8: 1120-1122. doi:10.1063/1.1289495

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Author Varnavski, O.
Menkir, G.
Goodson, T.
Burn, P. L.
Title Ultrafast polarized fluorescence dynamics in an organic dendrimer
Journal name Applied Physics Letters   Check publisher's open access policy
ISSN 0003-6951
Publication date 2000-08
Sub-type Article (original research)
DOI 10.1063/1.1289495
Open Access Status File (Publisher version)
Volume 77
Issue 8
Start page 1120
End page 1122
Total pages 3
Place of publication Melville, NY, United States
Publisher AIP Publishing
Language eng
Abstract The excited state relaxation processes of a nitrogen-cored distyrylbenzene-stilbene (A-DSB) dendrimers and the analogous linear model compound (bis-MSB) were investigated by polarized fluorescence upconversion spectroscopy. The fluorescenceanisotropy (FA) of A-DSB was found to decay to a value close to zero in less than 200 fs after excitation. For the model compound bis-MSB the FA initial value was close to 0.4 and showed a relatively slow decay (82 ps) corresponding to the overall rotational diffusion of the molecule. The results are interpreted in terms of fast transition dipole reorientation during relaxation of the excited states of the branched molecules.
Keyword Anisotropy
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemistry and Molecular Biosciences
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Created: Tue, 02 Nov 2010, 09:07:09 EST