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Issue 14, 2010
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Design and photoinduced surface relief grating formation of photoresponsive azobenzene based molecular materials with ruthenium acetylides

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Abstract

Novel photoresponsive materials based on ruthenium(II) σ-acetylides coupled to an azobenzene moiety in the main π-conjugated chain have been synthesized. The introduction of a metal acetylide fragment in the same conjugated chain as the azobenzene induces the trans-cis-trans isomerization of the azo unit, while the rate of the thermal cis trans back isomerization increases with increasing overall electron richness of these compounds. These azobenzene-containing ruthenium(II) acetylides show satisfactory processability and give rise to spin-coated uniform thin films. Formation of surface-relief gratings on their amorphous thin films and in a PMMA polymer matrix using a picosecond pulsed laser at 532 nm results in instantaneous inscription: saturation of the first order diffraction efficiency and of the modulation amplitude of gratings were obtained in less than 1 s, while the orientation of these azodyes remains unchanged for up to 6 months.

Graphical abstract: Design and photoinduced surface relief grating formation of photoresponsive azobenzene based molecular materials with ruthenium acetylides

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Publication details

The article was received on 16 Oct 2009, accepted on 13 Jan 2010 and first published on 16 Feb 2010


Article type: Paper
DOI: 10.1039/B921450J
Citation: J. Mater. Chem., 2010,20, 2858-2864
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    Design and photoinduced surface relief grating formation of photoresponsive azobenzene based molecular materials with ruthenium acetylides

    K. N. Gherab, R. Gatri, Z. Hank, B. Dick, R. Kutta, R. Winter, J. Luc, B. Sahraoui and J. Fillaut, J. Mater. Chem., 2010, 20, 2858
    DOI: 10.1039/B921450J

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