Search for content and authors
 

Conducting discotic polyaromatic material with two unpaired electrons at oxidized state: Synthesis and properties.

Mohamed Jouini 

CNRS - Université Denis Diderot, ITODYS (ITODYS), Place Jussieu, Paris F-75005, France

Abstract
Polyaromatic molecules having symmetry axis equal or larger than three, possess degenerate HOMO’s and LUMO’s. This opens the possibility to abtain radical anions or cations in a high spin state. Oragnic molecules having high spin state are attractive in the search of electrical conductivity, ferromagnetism and even superconductivity[1]. Polyaromatic hydrocarbons are of interest as high spin-systems, because many of the monoradicals and diradicals are relatively stable systems. [2]

We report the electrohemical oxidation in acetonitrile of hexapyrrolyl benzene (HPyB) a polyaromatic heterocyclic compound. This oxidation leads to a discotic polyaromatic heterocyclic material (HPyB6a) and not to a linear polymer. [3] The electroactivity of this material shows two successive reversible redox waves corresponding to the transfer of two electrons and esr measurements at oxidized sate shows paramagnetic behaviour at room temperature.

[1] F. Demol, F. X. Sauvage, A. Devos, M.G. De Backer, Synth. Met., 99 (1999) 155.

O. Lemaire, M. De Backer, A. Devos, F. X. Sauvage, Synth. Met., 123 (2001) 61.

[2] F. Dietz, N. Tuytuylkov, G. Madjarova, K. Mullen, J. Phys. Chem. B, 104 (2000) 1746.

N. Tuytuylkov, G. Madjarova, F. Dietz, K. Mullen, J. Phys. Chem. B, 102 (1998) 10183.

[3] M. Lazerges, M. Jouini, P. Hapiot, P. Guiriec, P.-C. Lacaze, J. Phys. Chem. B, 107 (2003) 5042.

 

Legal notice
  • Legal notice:

    Copyright (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/11643 must be provided.

 

Related papers
  1. Development of electrocatalytic materials based on the mixed addenda Dawson heteropolyanion and conducting polymers

Presentation: Invited at E-MRS Fall Meeting 2007, Symposium D, by Mohamed Jouini
See On-line Journal of E-MRS Fall Meeting 2007

Submitted: 2007-05-14 19:08
Revised:   2009-06-07 00:44