一个结晶的发芽物,具有半孔的30环通道
Xiaoyan Ren1, Yi Li, Qinhe Pan
1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China.
Journal of the American Chemical Society
|October 8, 2009
概括
研究人员合成了一种新型的细菌材料,它具有迄今为止在晶体开放框架材料中观察到的最大的孔环 (30环通道). 这一发现为先进的材料应用开辟了新的途径.
科学领域:
- 材料科学 材料科学 材料科学
- 无机化学 无机化学 有机化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 开放框架材料对于催化和气体储存等应用至关重要.
- 合成具有大孔尺寸的新型结构仍然是一个重大挑战.
- 德国酸材料具有独特的结构多样性和大孔的潜力.
研究的目的:
- 为了合成和表征一种具有异常大的毛孔通道的新型菌体.
- 研究新材料的结构特征和孔隙尺寸.
- 探索德语集群在构建先进的开放框架中的潜力.
主要方法:
- 采用溶热合成条件来获得德酸盐.
- 使用适合晶体材料的技术进行了结构性表征.
- 根据构成的德意志群集分析了框架拓.
主要成果:
- 一种新型的德国酸,C(6) N(2) H(18) [Ge(9) O(18) X(4) ](6) [Ge(7) O(14) X(3) ](4) [Ge(7) O(14.42) X(2.58) ](8) [GeX(2) ](1.73) (X = OH,F),已成功合成.
- 该材料展示了30个环状通道,这是晶体开放框架中最大的报道.
- 测定了13.0 x 21.4 Å2的中孔孔径.
结论:
- 合成的酸代表了开放框架材料的重大进步,因为其创纪录的孔径大小.
- 该框架由Ge(7) 和Ge(9) 集群构建,集成到一个3D网结构中.
- 这一发现为设计具有增强性能的材料提供了一个新的平台,用于各种应用.
相关概念视频
01:26Imperfections in Crystal Structure: Stoichiometric Point Defects
Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
02:42Ionic Crystal Structures
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...