Correlated defect nanoregions in a metal-organic framework.
Correlated defect nanoregions in a metal-organic framework.
复制标题
金属有机框架中相互关联的缺陷纳米区域。
DOI：
10.1038/ncomms5176
复制
发表时间：
2014-06-20
影响因子：
16.6
通讯作者：
Goodwin AL
中科院分区：
文献类型：
--
作者：
Cliffe MJ;Wan W;Zou X;Chater PA;Kleppe AK;Tucker MG;Wilhelm H;Funnell NP;Coudert FX;Goodwin AL
在许多凝聚态科学中，相关无序是物质功能的关键。虽然结构和成分缺陷已知存在于各种金属有机框架中，但普遍的理解是这些缺陷只是以随机方式包含的。在这里，我们展示了-使用漫射散射，电子显微镜，异常x射线散射和对分布函数测量的组合-缺陷之间的相关性实际上可以在对苯二甲酸铪金属有机框架内引入和控制。出现的纳米级缺陷结构是岩盐结构过渡金属氧化物中相关肖特基空位的类似物，并对存储，运输，光学和机械响应具有重要意义。我们的研究结果提示了如何重新解释一些金属有机框架的衍射行为，并建立了一种利用相关纳米级无序作为金属有机框架设计中可靶向和理想的基序的策略。
Throughout much of condensed matter science, correlated disorder is key to material function. While structural and compositional defects are known to exist within a variety of metal–organic frameworks, the prevailing understanding is that these defects are only ever included in a random manner. Here we show—using a combination of diffuse scattering, electron microscopy, anomalous X-ray scattering, and pair distribution function measurements—that correlations between defects can in fact be introduced and controlled within a hafnium terephthalate metal–organic framework. The nanoscale defect structures that emerge are an analogue of correlated Schottky vacancies in rocksalt-structured transition metal monoxides and have implications for storage, transport, optical and mechanical responses. Our results suggest how the diffraction behaviour of some metal–organic frameworks might be reinterpreted, and establish a strategy of exploiting correlated nanoscale disorder as a targetable and desirable motif in metal–organic framework design.