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，MOF）的类别中，一些MOF表现出所谓的栅极开口行为，取决于用客人分子的毛孔负载程度。在这些结构柔性的材料中，晶体结构在外部刺激上做出反应，例如某些气体的存在差异，因此它们被视为具有各种潜在应用的有前途的可切换材料。但是，到目前为止，仅出于一些示例，它们的结构如何变化。该项目的一个目的是对结构变化的详细研究，以了解门打开效应的起源和后果。为此，基于在吸附研究条件下收集的X射线粉末衍射模式，将进行吸附实验的组合，包括纯净和混合的气体吸附研究和突破实验以及结构测定研究。除此之外，为我们的实验室衍射仪改善本地建造的原位（吸附 / X射线衍射）样品持有人的核心任务是为了扩展研究结构柔性材料的实验可能性 - 独立于访问同步型光束线。拟议的项目需要与所涉及的研究小组与他们在吸附和结构表征方面的个人专业知识进行密切合作。