Issue 24, 2002
From the journal:

Physical Chemistry Chemical Physics

Photoinduced electron-transfer processes in C60-tetrathiafulvalene dyads containing a short or long flexible spacer†

Emmanuel Allard,a   Jack Cousseau,*a   Jesus Ordúna,b   Javier Garín,b   Hongxia Luo,c   Yasuyuki Arakic  and  Osamu Ito*c  

* Corresponding authors

a Laboratoire d'Ingénierie Moléculaire et Matériaux Organiques, UMR CNRS 6501, University of Angers, 2 Bd Lavoisier, Angers Cedex, France
E-mail: jack.cousseau@univ-angers.fr

b Departamento de Química Orgánica, ICMA, Universidad de Zaragoza-CSIC, Spain

c Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, CREST (JST), Katahira, Aoba-ku, Sendai, Japan
E-mail: ito@tagen.tohoku.ac.jp

Abstract

Intramolecular photoinduced charge-separation and charge-recombination processes in two C60-spacer-TTF dyads, in which C60 and TTF (tetrathiafulvalene) are connected through a flexible spacer of different lengths, have been investigated in polar solvents by time-resolved absorption and fluorescence techniques. Weak interaction between the C60-moiety and TTF-moiety in the ground state was suggested by the steady-state absorption spectra; the dyad with the shorter spacer shows slightly stronger interaction than that with the longer spacer. The observed short fluorescence lifetimes of these dyads, compared with that of their precursor fullerene derivative in THF and benzonitrile indicate that the charge separation takes place via the singlet excited state of the C60-moiety, producing the ion pairs (C60˙−-spacer-TTF˙+) as shown from the transient absorption spectra in the 800–1100 nm region. In polar benzonitrile solvent, the ion-pair state with the long flexible chain shows longer lifetime than that with the short chain, suggesting that weaker interaction between C60 and TTF moieties is preferred to the long ion-pair lifetime. These observations were compared with other reported data for C60-TTF dyads.

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/B206668H
Article type
Paper
Submitted
09 Jul 2002
Accepted
14 Oct 2002
First published
31 Oct 2002

Phys. Chem. Chem. Phys., 2002,4, 5944-5951

Permissions

Request permissions

Photoinduced electron-transfer processes in C60-tetrathiafulvalene dyads containing a short or long flexible spacer

E. Allard, J. Cousseau, J. Ordúna, J. Garín, H. Luo, Y. Araki and O. Ito, Phys. Chem. Chem. Phys., 2002, 4, 5944 DOI: 10.1039/B206668H

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.

Social activity

Spotlight

Advertisements