Formation of crystalline nanoclusters of Fe2P, RuP, Co2P, Rh2P, Ni2P, Pd5P2, or PtP2 in a silica xerogel matrix from single-source molecular precursors
Formation of crystalline nanoclusters of Fe2P, RuP, Co2P, Rh2P, Ni2P, Pd5P2, or PtP2 in a silica xerogel matrix from single-source molecular precursors
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DOI：
10.1021/cm970673p
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发表时间：
1998-02
影响因子：
8.6
通讯作者：
C. Lukehart;S. Milne;S. Stock
中科院分区：
文献类型：
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作者：
C. Lukehart;S. Milne;S. Stock
已为第一、第二或第三过渡金属系列的七种金属制备了含有具有烷氧基硅基官能团的双功能膦配体的金属络合物。使用Sol−凝胶化学将这些单一来源的前体加入到二氧化硅干凝胶基质中，就可以得到分子掺杂的干凝胶。在单一还原条件下对这些掺杂的干凝胶进行后续热处理，选择性地得到Fe2P、RUP、Co2P、Rh2P、Ni2P、Pd5P2或PtP2纳米团簇，它们高度分散在干凝胶基质的整体中。通过透射电子显微镜、能谱、X-射线衍射仪和电子衍射仪对这些纳米复合材料进行了表征，结果表明金属磷化物纳米团簇具有高度的结晶性，部分呈现非球形的形貌。
Metal complexes containing bifunctional phosphine ligands that possess alkoxysilyl functional groups have been prepared for seven metals of the first, second, or third transition metal series. Incorporation of these single-source precursors into silica xerogel matrixes using sol−gel chemistry affords molecularly doped xerogels. Subsequent thermal treatment of these doped xerogels under solely reducing conditions selectively affords nanoclusters of Fe2P, RuP, Co2P, Rh2P, Ni2P, Pd5P2, or PtP2 which are highly dispersed throughout the bulk of the xerogel matrix. Characterization of these nanocomposite materials by transmission electron microscopy, energy-dispersive spectrometry, X-ray diffraction, and electron diffraction indicates that the metal phosphide nanoclusters are highly crystalline with some exhibiting nonspherical morphology.