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Synthesis, structure and luminescence studies of europium alkoxides and related complexes.

机译：醇盐及相关配合物的合成，结构和发光研究。

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摘要

Europium is an important component in many solid-state phosphor materials due to its spectral transitions at wavelengths well suited to the human eye. Europium-containing solid state-materials would be improved through better control of particle size and homogeneity by using well-defined europium alkoxide complexes via sol-gel or MOCVD processing, but little is known about the synthesis of the necessary europium alkoxide complexes. Heterometallic europium alkoxide complexes would be especially useful as single-source precursors for multi-component phosphor materials. This dissertation describes the development of synthetic procedures to obtain europium alkoxide complexes, the investigation of structural features of these complexes, and luminescence studies to probe the utility of europium alkoxide complexes as solution-based models for europium phosphors. Europium metal dissolves in liquid ammonia and this solution reacts with 2,6-disubstituted-aryl-alcohols to form mono-, bi- and tetrametallic europium aryloxide complexes, depending on the substitution of the aryl alcohol. Reactions involving mixtures of europium and alkaline earth metals were found to produce mixtures of homometallic aryloxide products. Reactions of europium with the chelating alcohols 2-methoxyethanol and carbitol produce highly aggregated and very soluble europium alkoxide complexes, which form crystalline adducts when treated with aryl alcohols. In the case of 2-methoxyethanol the alcohol adducts react with Al2Me 6 to form aluminum-containing heterometallic species. The reaction of europium metal with isopropanol and aryl alcohols provides a route to tri-, penta-, octa-, and nonametallic europium species, which contain divalent and/or trivalent europium, depending on the reaction conditions. Similar reactions run with mixtures of europium and barium yielded heterometallic alkoxide complexes. Well-characterized heterometallic europium/zirconium halide complexes have also been synthesized by using the di-zirconium-nona-isopropoxide (dzni) unit as an ancillary ligand for the lanthanides. The conversion of dzni lanthanide halides to cyclopentadienyl complexes is also described. The synthesis of anhydrous hexafluoroacetylacetonate and pentafluorobenzoate complexes of europium from europium oxide and metal is described. Luminescence spectra and structures of the new compounds are discussed in the appropriate chapters.
机译：由于its在很适合人眼的波长处发生光谱跃迁，因此spectral是许多固态磷光体材料中的重要成分。含well的固态材料将通过溶胶-凝胶或MOCVD工艺使用定义明确的醇盐配合物，通过更好地控制粒径和均匀性而得到改善，但是对于必要的necessary醇盐配合物的合成知之甚少。异金属euro醇盐络合物作为多组分磷光体材料的单源前体特别有用。本论文描述了获得obtain醇盐配合物的合成方法的发展，这些配合物的结构特征的研究以及发光研究，以探索醇盐配合物作为solution基荧光粉的溶液模型。 metal金属溶解在液态氨中，该溶液与2，6-二取代的芳基醇反应生成单，双和四金属euro芳基氧化物络合物，具体取决于芳基醇的取代情况。发现涉及involving和碱土金属的混合物的反应产生均金属芳基氧化物产物的混合物。 with与螯合醇2-甲氧基乙醇和卡必醇的反应产生高度聚集且非常易溶的euro醇盐配合物，当用芳基醇处理时，它们会形成结晶加合物。在2-甲氧基乙醇的情况下，醇加合物与Al 2 Me 6 反应形成含铝的杂金属。 metal金属与异丙醇和芳基醇的反应提供了通往三，五，八和非金属lic物种的途径，这些物种根据反应条件而含有二价和/或三价euro。用euro和钡的混合物进行类似的反应得到异金属醇盐配合物。还通过使用壬二酸二锆（dzni）单元作为镧系元素的辅助配体合成了表征充分的杂金属euro /锆卤化物配合物。还描述了dzni镧系元素卤化物向环戊二烯基络合物的转化。描述了由氧化euro和金属合成of的无水六氟乙酰丙酮酸酯和五氟苯甲酸酯络合物。在适当的章节中讨论了新化合物的发光光谱和结构。

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  • 作者

    Greci, Michael Anthony.;

  • 作者单位

    University of California, Irvine.;

  • 授予单位 University of California, Irvine.;
  • 学科 Chemistry Inorganic.
  • 学位 Ph.D.
  • 年度 1999
  • 页码 131 p.
  • 总页数 131
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无机化学;
  • 关键词

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