Issue 9, 2007
From the journal:

Photochemical & Photobiological Sciences

Ultrafast excited-state dynamics of phenyleneethynylene oligomers in solution†

Guillaume Duvanel,a   Jakob Grilj,a   Anne Schuwey,b   Albert Gossauerb  and  Eric Vauthey*a  

* Corresponding authors

a Department of Physical Chemistry of the University of Geneva, 30 quai Ernest-Ansermet, Geneva 4, Switzerland
E-mail: eric.vauthey@chiphy.unige.ch

b Department of Chemistry of the University of Fribourg, Pérolles, Fribourg, Switzerland

Abstract

The excited-state dynamics of oligomeric phenyleneethynylenes (OPEs) of various length and substitution has been investigated by femtosecond time-resolved spectroscopy. The fluorescence lifetime of the OPEs decreases with the number of phenyleneethynylene units up to about 9. This effect is due to an increase of the oscillator strength for the S1–S0 transition. Dynamic features occurring within a few tens of picoseconds and ascribed to structural relaxation directly after population of the S1 state can be observed in non-viscous solvents. The effect of torsional disorder on the fluorescence intensity is shown to depend strongly on the nature of the substituent on the phenyl groups. All these effects are qualitatively discussed with a simple exciton model.

Graphical abstract: Ultrafast excited-state dynamics of phenyleneethynylene oligomers in solution

About
Cited by
Related
Download options Please wait...

Article information

DOI
https://doi.org/10.1039/B702647A
Article type
Paper
Submitted
20 Feb 2007
Accepted
05 Apr 2007
First published
27 Apr 2007

Photochem. Photobiol. Sci., 2007,6, 956-963

Permissions

Request permissions

Ultrafast excited-state dynamics of phenyleneethynylene oligomers in solution

G. Duvanel, J. Grilj, A. Schuwey, A. Gossauer and E. Vauthey, Photochem. Photobiol. Sci., 2007, 6, 956 DOI: 10.1039/B702647A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements