Exploring the Solid-State Properties of Phosphine Coordination Materials

探索磷化氢配位材料的固态性质

• 批准号: 1506694
• 负责人: Simon Humphrey
• 金额: $ 42万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-08-15 至 2019-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1506694&HistoricalAwards=false
• 关键词: Exploring; Solid; State; Properties; Phosphine

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.

非技术摘要该项目涉及制备一系列新的结晶多孔材料，这些材料具有理想的性能，可用于与能源和环境相关的一系列应用。 多孔材料在许多大型工艺中至关重要，例如水净化、气体分离和净化、聚合物合成、通过捕获废物流中的有毒化学物质来环境保护等等。 探索可提供增强性能的新型多孔材料的合成非常重要。 在材料研究部固态和材料化学项目的支持下，这项研究活动的主要目标与这一挑战直接相关，包括结合以前未探索的化学功能的新材料的合成和应用测试。 该项目纳入了一项创新的国际学生交流计划，旨在激励本科生从事研究性学习。该项目还为学生提供了一个独特且宝贵的机会，通过在全球几所优秀合作大学之一的出国留学一段时间，充分熟悉科学领域的国际合作文化。技术摘要这项研究活动的目标包括使用特定的合成策略制备新的金属有机框架（MOF）材料家族，从而获得具有以前无法获得的化学反应性的材料。 MOF 是结晶聚合物固体，包含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），可供各种“客体”吸附物使用。 MOF 作为高容量气体储存材料以及小分子和其他物质（如重金属离子）的封存材料已经显示出巨大的前景。 它们的广泛适用性源自极端的设计灵活性，作为其制备中所用组分的函数。 Humphrey 小组已经建立了基于定制有机膦和基于膦配体的金属配合物制备 MOF 的合成方法。 膦基配合物作为可诱导小分子活化的活性催化物质非常重要；因此，将这种反应性纳入 MOF 类材料具有及时的意义。 在该项目中，首先合成具有明确开放（不饱和）金属位点的膦配合物，然后用于构建多孔 MOF。 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和分子传感直接相关的客体物种的结合和选择性封存行为。 该项目非常适合向年轻研究人员传授从分子合成到固态材料化学和表征的一系列技能。