Gate opening behaviour of structurally flexible porous coordination polymers - characterization by combined X-ray diffraction and sorption studies

结构柔性多孔配位聚合物的开门行为 - 通过 X 射线衍射和吸附研究相结合的表征

• 批准号: 270107402
• 负责人: Professor Dr. Roger Gläser
• 金额: --
• 依托单位: Institut für Anorganische Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/270107402?language=en
• 关键词: Gate; opening; behaviour; structurally; flexible

Out of the class of porous coordination polymers (metal-organic frameworks, MOFs) some MOFs exhibit so-called gate opening behaviour which is dependent on the degree of loading of the pores with guest molecules. In these structurally flexible materials the crystal structure responds on external stimuli such as differences in presence of certain gases, and therefore they are regarded as promising switchable materials with various potential applications. However, up to now only for a few examples it is known, how their structures change. One aim of this project are detailed investigations of structural changes in order to understand origin and consequences of the gate opening effect. For that purpose a combination of sorption experiments, including pure and mixed gas sorption studies and break through experiments, and structure determination studies will be performed based on X-ray powder diffraction patterns collected at the conditions of the sorption studies. Besides that, it is an central task within the project, to improve the home-built in situ (sorption / X-ray diffraction) sample holder for our laboratory diffractometer in order to extend the experimental possibilities for investigation of structurally flexible materials - independent of access to synchrotron beam lines. The proposed project requires a close cooperation of the involved research groups with their individual expertise in sorption and structural characterization.

在多孔配位聚合物（金属-有机框架，M0F）的类别之外，一些M0F表现出所谓的门打开行为，其取决于用客体分子加载孔的程度。在这些结构柔性材料中，晶体结构响应于外部刺激，例如某些气体存在的差异，因此它们被认为是具有各种潜在应用的有前途的可切换材料。然而，到目前为止，只有少数几个例子是已知的，它们的结构如何变化。该项目的目的之一是详细调查结构变化，以了解闸门开启效应的起源和后果。为此，将根据在吸附研究条件下收集的X射线粉末衍射图，进行吸附实验（包括纯气体和混合气体吸附研究和穿透实验）和结构测定研究的组合。除此之外，该项目的一项中心任务是改进我们实验室衍射仪的自制原位（吸附/X射线衍射）样品保持器，以扩展研究结构灵活材料的实验可能性-独立于同步加速器光束线的访问。拟议的项目需要有关研究小组与其在吸附和结构表征方面的个人专门知识密切合作。