Coordination Polymer Heterostructures

配位聚合物异质结构

• 批准号: 1405439
• 负责人: Daniel Talham
• 金额: $ 41.1万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-05-01 至 2017-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1405439&HistoricalAwards=false
• 关键词: Coordination; Polymer; Heterostructures

TECHNICAL SUMMARYThe project will undertake a series of systematic investigations of the structural aspects of nanometer scale and mesoscale coordination polymer heterostructures. The goals are to better understand how coordination polymer networks accommodate the presence of an interface and, therefore, how interfaces can be used to control properties. Specific studies will elucidate the nature of structural changes induced by an interface, for example biaxial or isotropic, and how the structural changes differ if the strain is compressive vs tensile. The depth away from the interface that strain or structural reorganization persists and the limits of structural parameters that allow epitaxial relationships between the heterostructure components will also be explored. After comparing static structures, elastic processes and how a light- or thermally-induced structural event in one component is manifested in the other component via the interface will be investigated. Studies will focus on cyanometallate coordination polymers of the Prussian blue analogue family, taking advantage of more than twenty easily accessible and air-stable analogues based on first-row transition metals. A wide range of heterostructures are known, allowing for systematic variation of the parameters to be studied via control of particle size, structure, composition and component thickness. The principal method of analysis will be X-ray diffraction, using both laboratory and synchrotron sources. Data from X-ray scattering will be complemented by electron microscopy and electron diffraction. NONTECHNICAL SUMMARYThe simple promise of composite particles, or "heterostructures", is combining more than one property in a single material. However, beyond simply adding properties, synergy between components can lead to new behavior and new function. When heterostructures lead to "more than the sum of the parts", it is the interface between the constituents that causes the new properties. The goals of the project are to learn how interfaces change the structures of a new class of materials, called coordination polymer heterostructures, and to then develop insights into how these heterostructures can be used to control properties. Generalized results can inform many areas of current materials science, including magnetism, battery technology, thermal properties of materials, gas storage and separations, catalysis, as well as applications in bioanalysis and biomaterials. The research tasks are designed to be platforms for graduate and undergraduate student education, preparing them with the "21st-Century Skills" needed to contribute to a high-technology workforce. The research activities emphasize collaboration between disciplines, both among US institutions and with international partners, and will make significant use of the Advanced Photon Source, a major US multi-user facility where students receive training.

本项目将对纳米尺度和介观尺度配位聚合物异质结构的结构方面进行一系列系统的研究。 目标是更好地理解配位聚合物网络如何适应界面的存在，以及如何使用界面来控制性能。 具体的研究将阐明由界面引起的结构变化的性质，例如双轴或各向同性，以及如果应变是压缩应变与拉伸应变，结构变化如何不同。 远离应变或结构重组的界面的深度持续存在，以及允许异质结构组件之间的外延关系的结构参数的限制也将被探索。 在比较静态结构后，将研究弹性过程以及一个组件中的光或热诱导结构事件如何通过界面在另一个组件中表现出来。 研究将集中在普鲁士蓝类似物家族的氰基金属配位聚合物上，利用基于第一行过渡金属的20多种容易获得和空气稳定的类似物。 已知多种异质结构，允许通过控制颗粒尺寸、结构、组成和部件厚度来研究参数的系统变化。 分析的主要方法将是X射线衍射，使用实验室和同步辐射源。 来自X射线散射的数据将由电子显微镜和电子衍射来补充。 复合粒子或“异质结构”的简单承诺是将一种以上的性质结合在单一材料中。 然而，除了简单地添加属性之外，组件之间的协同作用可以产生新的行为和新的功能。 当异质结构导致“超过部分之和”时，是组分之间的界面导致了新的性质。 该项目的目标是了解界面如何改变一类新材料的结构，称为配位聚合物异质结构，然后深入了解这些异质结构如何用于控制性能。 广义结果可以为当前材料科学的许多领域提供信息，包括磁性，电池技术，材料的热性能，气体储存和分离，催化以及在生物分析和生物材料中的应用。 研究任务旨在成为研究生和本科生教育的平台，为他们提供为高科技劳动力做出贡献所需的“21世纪技能”。 研究活动强调学科之间的合作，无论是在美国机构和国际合作伙伴，并将利用先进的光子源，一个主要的美国多用户设施，学生接受培训的显着使用。