Humboldt-Universität zu Berlin, Department of Chemistry, Brook-Taylor-Straße 2, 12489 Berlin, Germany.
Dalton Trans. 2013 Apr 28;42(16):5706-10. doi: 10.1039/c3dt32652g.
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 Mg3(μ3F)(μ-TFA)6(OCH3)2(py) 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.
研究了将镁和铝氟化物纳米粒子用于制备透明复合材料，从而获得具有优异性能的材料。通过烷氧基的氟解溶胶-凝胶途径制备了纳米级的镁和铝氟化物，并通过与三氟乙酸或全氟丁酸反应进行表面改性。干凝胶的红外光谱实验和三核[Mg3(μ3F)(μ-TFA)6(OCH3)2(py)]（3-）簇单元的晶体结构分析表明，羧酸酯基团以单齿或双齿桥联方式键合在颗粒表面上。这些颗粒成功地掺入到丙烯酸酯聚合物中，含量高达 40wt%，得到完全透明的材料。薄膜的椭圆偏振测量和 m 线测量表明，随着金属氟化物填料含量的增加，复合膜的折射率降低。
