Na(1.5) Ag(1.5) MO3F3 (M = Mo,W):是LiNbO3结构的一个有序的氧化物衍生物
Allyson M Fry1, Harry A Seibel, Indunil N Lokuhewa
1Department of Chemistry, The Ohio State University, Columbus, Ohio 43210-1185, USA.
Journal of the American Chemical Society
|December 23, 2011
概括
新的极性氧化材料,Na(1.5) Ag(1.5) MoO(3) F(3) 和Na(1.5) Ag(1.5) WO(3) F(3),表现出有序的结构. 这种/银离子和氧化基的排序为设计极性材料提供了一条新途径.
科学领域:
- 固态化学 固态化学
- 材料科学 是一种材料科学.
- 晶体学 晶体学是指结晶学.
背景情况:
- [MO(3) F(3) ](3-) 离子 (M = Mo,W) 通常在晶体盐中表现出方向障碍.
- 开发具有定制性质的新极性材料是材料科学的持续挑战.
研究的目的:
- 合成和描述具有潜在独特结构和极性质的新型银氧化.
- 调查阴离子选择在指导极性氧化化离子排序中的作用.
主要方法:
- 固态合成反应被用来制备目标化合物.
- 用同步射线X射线和中子粉衍射技术进行了详细的结构特征.
主要成果:
- 纳1.5) Ag1.5) MoO3) F3) 和纳1.5) Ag1.5) WO3) F3) 已成功合成并从结构上阐明.
- 发现了一种新型结构类型,其特点是[MO(3) F(3) ](3-) 离子的方向排序.
- 和银离子显示出明显的协调偏好 (分别是和氧),驱动观察到的顺序.
结论:
- /离子排序和离子定向排序的结合导致了具有减少对称性的超细胞结构 (R3).
- 这项工作提出了一种新的策略,用于设计极性材料,利用硬和软的离子来控制极性建筑单元的排列.
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