Portal de Periódicos da CAPES

Photochromic Sol-Gel Films Containing Dithienylethene and Azobenzene Derivatives: From the Design of Optical Components to the Optical Data Storage

2000; Volume: 344; Issue: 1 Linguagem: Inglês

10.1080/10587250008023817

1058-725X

Frédéric Chaput, John Biteau, Khalid Lahlil, J.P. Boilot, Bruno Darracq, Yves Lévy, Jacques Peretti, V. I. Safarov, Gilles Parent, Alvaro Fernandez‐Acebes, J-M. Lehn,

Porphyrin and Phthalocyanine Chemistry

Abstract This work is devoted to photoresponsive hybrid organic-inorganic materials prepared by the sol-gel method, using dithienylethene or azobenzene as photosensitive chromophores. These photochromic units were covalently attached to the silica backbone as part of the main-chain and as a side group respectively. The electrocyclization of dithienylethene or the isomerization of azobenzene under irradiation cause local modifications of the optical properties of the host sol-gel polymers We took advantage of either high refractive index changes (>10−2) or material deformation of the sol-gel films to design optical components and to store information.