Seisenbaeva Gulaim A, Kessler Vadim G, Pazik Robert, Strek Wieslaw
Department of Chemistry, SLU, Box 7015, SE-75007, Uppsala, Sweden.
Dalton Trans. 2008 Jul 14(26):3412-21. doi: 10.1039/b801351a. Epub 2008 Jun 3.
Systematic structural study of the molecules, resulting from microhydrolysis of heterometallic beta-diketonate alkoxides of barium and strontium (single-source precursors of perovskite oxide materials), demonstrates that the structures of these products result from a thermodynamically driven self-assembly of metal cations and ligands directed towards the most densely packed cores. The ratio between metal cations, and of the cations to bidentate heteroligands, is easily changed to enable the highest packing density. The key to the application of single-source precursors appears to be the use of stoichiometric or superstoichiometric water amounts together with solvents preventing diffusion of possible homometallic intermediates. Eu-doped BaTiO3 nanoparticles have been successfully obtained and characterized.
对钡和锶的杂金属β-二酮醇盐（钙钛矿氧化物材料的单源前驱体）进行微水解所产生的分子进行系统结构研究表明，这些产物的结构源于金属阳离子和配体在热力学驱动下自组装形成最紧密堆积的核。金属阳离子之间以及阳离子与双齿杂配体之间的比例很容易改变，以实现最高的堆积密度。单源前驱体应用的关键似乎是使用化学计量或超化学计量的水量以及防止可能的同金属中间体扩散的溶剂。已成功制备并表征了铕掺杂的钛酸钡纳米颗粒。
