Eur. Phys. J. AP 18, 3-8 (2002)
https://doi.org/10.1051/epjap:2002020

Photochromic oligothiophene substituted chromenes a new approach towards a molecular switch: electrical characterisation^*

¹ ITODYS, 1 rue Guy de la Brosse, 75005 Paris, France
² Laboratoire de chimie organique, Faculté des sciences et techniques, Settat, Morocco
³ LCMOM, ERS CNRS 158, Faculté des sciences de Luminy, 163 avenue de Luminy, 13288 Marseille Cedex 09, France

Corresponding author: Yassar@Paris7.Jussieu.fr

Received: 4 February 2000
Revised: 19 November 2001
Accepted: 24 January 2002
Published online: 15 April 2002

Abstract

We present a new approach for the realisation of a molecular photo-switch, based on photochrochromic oligothiophene-substituted chromenes. When optically excited, these compounds undergo a structural change passing from a neutral state (closed form) to a strongly polarized one (open form). This photochromic process is accompanied by a deep changes in the electrical characterisation.