Exploring the Solid-State Properties of Phosphine Coordination Materials

非技术概述该项目涉及制备一种新的结晶多孔材料家族，其显示出理想的性能，可以在与能源和环境相关的一系列应用中开发。 多孔材料在许多大规模工艺中至关重要，例如水净化、气体的分离和净化、聚合物合成、通过捕集废物流中的有毒化学品的环境保护以及许多其它工艺。 重要的是要探索合成新的多孔材料，可以设计提供增强的性能。 在材料研究部门的固态和材料化学计划的支持下，这项研究活动的主要目标与这一挑战直接相关，包括新材料的合成和应用测试，这些新材料包含以前未开发的化学功能。 该项目包括一个新的和创新的国际学生交流计划，旨在激励本科生从事研究型学习。该计划还为学生提供了一个独特而宝贵的机会，通过在地球仪的几所优秀合作大学之一的海外学习，充分了解科学领域的国际合作文化。技术概述这项研究活动的目标涉及制备一种新的金属有机框架（MOF）材料，使用一种特殊的合成策略，该策略提供了获得具有以前无法获得的化学反应性的材料的途径。 MOF是结晶的聚合物固体，其含有精确的分子结构，并表现出相互连接的小孔网络（0.5-5.0 nm），其可被广泛的“客体”吸附物接近。 MOFs已经显示出作为高容量气体储存材料以及用于螯合小分子和其他物质如重金属离子的巨大前景。 其广泛的适用性来自于极端的设计灵活性，作为其制备中使用的组件的功能。 Humphrey小组已经建立了基于定制的有机膦和基于膦配体的金属络合物来制备M0 F的合成方法。 基于膦的络合物作为可以诱导小分子活化的反应性催化物质是重要的;因此，将这种反应性结合到M0 F型材料中是及时的兴趣。 在这个项目中，首先合成具有明确的开放（不饱和）金属位点的膦配合物，然后用于构建多孔MOFs。 随后，在一系列条件下研究这些材料，以评估与未来能源应用直接相关的客体物种的结合和选择性螯合行为，以及分子传感。 该项目非常适合教授年轻研究人员从分子合成到固态材料化学和表征的一系列技能。

Non-Technical SummaryThis project involves the preparation of a new family of crystalline porous materials that display desirable properties, which can be exploited in a range of applications relating to energy and the environment. Porous materials are of critical importance in many large-scale processes, such as water purification, the separation and purification of gases, polymer synthesis, environmental protection by trapping of toxic chemicals in waste streams, and many others. It is important to explore the synthesis of new porous materials that can be designed to offer enhanced properties. With support of the Solid State and Materials Chemistry Program in the Division of Materials Research, the major goals of this research activity directly relate to this challenge, and include the synthesis and application testing of new materials that incorporate previously unexplored chemical functionalities. This project incorporates a new and innovative international student exchange program, which is aimed at inspiring undergraduate students to become engaged in research-based studies. The program also provides students a unique and invaluable opportunity to become fully acquainted with the culture of international collaboration in the sciences, through a period of study abroad at one of several outstanding partner universities across the globe.Technical SummaryThe goals of this research activity involve the preparation of a new family of metal-organic framework (MOF) materials, using a specific synthetic strategy that provides access to materials with previously inaccessible chemical reactivity. MOFs are crystalline, polymeric solids that contain precise molecular architectures and exhibit inter-connected networks of small pores (0.5-5.0 nm), which are accessible to a broad range of 'guest' adsorbates. MOFs have already shown great promise as materials for high capacity gas storage, and for sequestration of small molecules and other species such as heavy metal ions. Their broad applicability is derived from extreme design flexibility, as a function of the components used in their preparation. The Humphrey group has established synthetic approaches to prepare MOFs based on tailored organophosphine and metallic complexes based on phosphine ligands. Phosphine-based complexes are important as reactive catalytic species that can induce small molecule activation; it is therefore of timely interest to incorporate such reactivity into MOF-type materials. In this project, phosphine complexes with well-defined open (unsaturated) metal sites are first synthesized and then used to construct porous MOFs. Subsequently, these materials are studied under a range of conditions to assess the binding and selective sequestration behavior toward guest species of direct relevance to future energy applications, and for molecular sensing. The project is ideally suited to teach young researchers a range of skills from molecular synthesis to solid-state materials chemistry and characterization.