Syntheses, crystal structures, magnetic and optical properties of novel solid-state rare-earth cyanamide and carbodiimide compounds

这项主要是合成/实验项目的目标是制备新型磁性和发光材料，属于含有Ln-NCN2-结构片段的固态稀土氰胺和碳二亚胺化合物。它将以我们最近开发的熔剂路线为基础，使用简单的稀土卤化物以及碱金属氰化物和叠氮化物作为前体。我们计划进一步丰富与Eu相关的合成贡献，用X射线衍射方法表征其他新化合物，并通过电子结构计算来合理地确定它们的组成和结构性质。此外，合成方法将扩展到其他一些稀土元素。最终，将合成几种含有各种稀土元素或这些相的掺杂变体的新材料。物理表征，特别是磁性测量以及对其发光特性的检查，将是该项目的另一个主要重点。

This mostly synthetic/experimental project is targeted at the preparation of novel magnetic and luminescent materials belonging to the class of solid-state rare-earth cyanamide and carbodiimide compounds containing Ln-NCN2- structural fragments. It will be based on our recently developed flux route employing the simple rare-earth halides as well as alkali-metal cyanides and azides as precursors. We plan to further enrich the europium-related synthetic contributions, characterize other new compounds using X-ray diffraction methods, and rationalize their compositions and also structural properties by means of electronic structure calculations. In addition, the synthetic approach will be extended to some of the other rare-earth elements. Eventually, a couple of new materials containing various rare-earth elements or doped variants of these phases will be synthesized. Physical characterization, in particular magnetic measurements as well as the examination of their luminescence properties, will be another major focus of this project.