The pair distribution function (PDF) is a versatile characterisation tool in materials science, capable of retrieving atom–atom distances on a continuous scale (from a few angstroms to nanometres), without being restricted to crystalline samples. Typically, total scattering experiments are performed using high-energy synchrotron X-rays, neutrons or electrons to achieve a high atomic resolution in a short time. Recently, PDF analysis provides a powerful approach to target current characterisation challenges in the field of metal- and covalent organic frameworks. By identifying molecular interactions on the pore surfaces, tracking complex structural transformations involving disorder states, and elucidating nucleation and growth mechanisms, structural analysis using PDF has provided invaluable insights into these materials. This review article highlights the significance of PDF analysis in advancing our understanding of MOFs and COFs, paving the way for innovative applications and discoveries in porous materials research.

中文翻译：

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探索无晶体的多孔结构：金属和共价有机框架中具有对分布函数的进展


对分布函数 （PDF） 是材料科学中的一种多功能表征工具，能够在连续尺度上（从几埃到纳米）检索原子-原子距离，而不限于晶体样品。通常，使用高能同步加速器 X 射线、中子或电子进行全散射实验，以在短时间内实现高原子分辨率。最近，PDF 分析提供了一种强大的方法来应对金属和共价有机框架领域当前的表征挑战。通过识别孔隙表面的分子相互作用，跟踪涉及无序状态的复杂结构转变，并阐明成核和生长机制，使用 PDF 进行结构分析为这些材料提供了宝贵的见解。这篇综述文章强调了 PDF 分析在促进我们对 MOF 和 COF 的理解方面的重要性，为多孔材料研究中的创新应用和发现铺平了道路。