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Updated: Jan 20, 2026

$Single Crystal and Powder X-ray Diffraction$

Single Crystal and Powder X-ray Diffraction

Published on: April 30, 2023

多晶X射线衍射 (MCXRD) 弥合了化学和材料科学中的晶体学特性差距:对MOF的应用

Joshua P Smith^1,2, Rebecca Smith¹, Thomas M Roseveare¹

¹Chemistry Division, MPS School, University of Sheffield, Brook Hill, Sheffield, S3 7HF, UK.

Angewandte Chemie (International ed. in English)

|January 19, 2026

概括

多晶X射线衍射 (MCXRD) 能够对小型或对辐射敏感的金属有机框架 (MOF) 进行原子分辨率结构确定. 这种技术克服了传统单晶方法在化学和材料科学中具有挑战性的材料的局限性.

科学领域:

晶体学晶体学是指结晶学.
材料科学材料科学材料科学
化学化学化学

背景情况:

单晶X射线衍射受到晶体大小的限制,容易受到来自强烈X射线源的辐射损伤.
从多个晶体的部分衍射数据中确定结构具有挑战性,但提供了一个潜在的解决方案.
现有的方法在材料过小或过于敏感的情况下扎,对于传统的单晶X射线衍射来说过小或过于敏感.

研究的目的:

适应多晶X射线衍射 (MCXRD) 来确定金属有机框架 (MOF) 材料的结构.
为了证明MCXRD对MOF的实用性,其晶体尺寸不适合传统的单晶研究.
为了减轻辐射诱导的化学变化和敏感样品的衍射质量退化.

主要方法:

利用同步子辐射进行多晶X射线衍射 (MCXRD) 测量.
在10到数千个晶体上采用了旋转和静止的MCXRD技术.
开发软件,以优化多个衍射数据集的组合.

主要成果:

成功确定了六种不同的MOF的晶体结构,包括MOF-919 ((Sc/Cu),MET-2,MIL-88B ((Cr) -1,4-NDC,PCN-260 ((Sc),UIO-66和UIO-66-MoO4.
实现了MOF的结构确定,单元细胞尺寸从18-114 Å,晶体大小从0.5-480 μm3.
展示了MCXRD处理单晶X射线衍射和电子衍射之间的颗粒大小和辐射灵敏度的样本的能力.

结论:

对于具有挑战性的金属有机框架材料,MCXRD提供了精确的原子分辨率结构确定.
这种方法弥合了传统的单晶X射线衍射和新兴电子衍射技术之间的差距.
在化学和材料科学中,MCXRD为小型和辐射敏感晶体材料的结构确定提供了可行的解决方案.

关键词:

大数据就是大数据.晶体结构晶体结构金属有机框架的框架.辐射损伤辐射损伤序列晶体学序列晶体学

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