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Issue 16, 2013
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Metal fluoride-based transparent nanocomposites with low refractive indices

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Abstract

The utilisation of magnesium and aluminium fluoride nanoparticles in the preparation of transparent composites leading to materials with superior properties was investigated. Nanoscopic magnesium and aluminium fluoride has been prepared by the fluorolytic sol–gel route from the alkoxides and was surface modified by the reaction with trifluoroacetic acid or perfluorobutyric acid. IR spectroscopic experiments of the xerogels and crystal structure analysis of a trinuclear [Mg33F)(μ-TFA)6(OCH3)2(py)]3− cluster unit indicate that the carboxylate group is bound to the particle surface in a monodentate or bidentate bridging fashion. These particles were successfully incorporated into acrylate polymers with up to 40 wt% content to give fully transparent material. Ellipsometry and m-line measurements of thin films show the reduction of the refractive index of composite films with increasing metal fluoride filler content.

Graphical abstract: Metal fluoride-based transparent nanocomposites with low refractive indices

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Publication details

The article was received on 06 Nov 2012, accepted on 11 Feb 2013 and first published on 11 Feb 2013


Article type: Paper
DOI: 10.1039/C3DT32652G
Citation: Dalton Trans., 2013,42, 5706-5710
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    Metal fluoride-based transparent nanocomposites with low refractive indices

    J. Noack, C. Fritz, C. Flügel, F. Hemmann, H. Gläsel, O. Kahle, C. Dreyer, M. Bauer and E. Kemnitz, Dalton Trans., 2013, 42, 5706
    DOI: 10.1039/C3DT32652G

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