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Issue 25, 2010
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Photoinduced surface-relief gratings in films of supramolecular polymerbisazobenzene complexes

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Abstract

We demonstrate that hydrogen-bonded polymerazobenzene complexes, containing nonpolar bisazobenzene chromophores, yield efficient photoinduced surface-relief gratings over a wide chromophore concentration range. The efficient grating formation is thought to be enabled by the lack of spacer between the chromophores and the polymer backbone, which prevents the formation of liquid-crystalline phases even at high chromophore concentrations. The surface-modulation depth can be tuned by varying the chromophore content, and the deepest gratings (625 nm) are obtained, when every second polymer repeat unit is occupied by a chromophore. The gratings are thermally erasable by heating the samples above their glass-transition temperature, and no irreversible photodegradation of the chromophores is observed.

Graphical abstract: Photoinduced surface-relief gratings in films of supramolecular polymer–bisazobenzene complexes

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Publication details

The article was received on 14 Jan 2010, accepted on 24 Mar 2010 and first published on 24 May 2010


Article type: Paper
DOI: 10.1039/C0JM00021C
Citation: J. Mater. Chem., 2010,20, 5260-5264
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    Photoinduced surface-relief gratings in films of supramolecular polymerbisazobenzene complexes

    J. Vapaavuori, A. Priimagi and M. Kaivola, J. Mater. Chem., 2010, 20, 5260
    DOI: 10.1039/C0JM00021C

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