Conductive Metal-Organic Frameworks

导电金属有机框架

• 批准号: 1309066
• 负责人: Jeffrey Long
• 金额: $ 52.34万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-15 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1309066&HistoricalAwards=false
• 关键词: Conductive; Metal; Organic; Frameworks

TECHNICAL SUMMARY:With the support of the Solid State and Materials Chemistry program in the Division of Materials Research, new synthetic strategies will be developed in pursuit of metal-organic frameworks that exhibit facile ionic and/or electronic charge mobility. The synthetic tunability of metal-organic frameworks is expected to stimulate inquiry into new physical phenomena such as nanometer scale pore confinement effects and framework-centered charge distribution on ion mobility as well as, electron correlation in one-dimensional materials, and the electronic and magnetic properties of low dimensional systems. Such investigations are of immediate interest for their potential battery applications as electrode or solid electrolyte component materials, electrocatalysis, thermoelectric devices and ultra-capacitors. Porous materials with high ion mobility can be prepared by engendering frameworks with delocalized or otherwise inaccessible charges in order to yield uncoordinated and pore-confined single-ion conductors. This will include the preparation of materials containing ionic metal clusters, ionic organic linkers, inclusion of bulky counterions, and characterizing ion mobility trends with respect to ion identity, pore dimensions, pore topography, framework topology, and crystallite morphology. Leveraging the modular nature of metal-organic frameworks in order to include reversible redox couples in both the inorganic and organic components of the material will target new electronically conductive frameworks. Other synthetic strategies not yet developed in this class of materials will also be explored. This will include optimization of electron correlation along one-dimensional chains of metal centers, the inclusion of stable organic radical, and tuning the band structure via ligand functionalization and inclusion of adventitious guest species. Doing so will allow investigation of charge mobility in porous structures from the perspective of fundamental coordination chemistry, a technique commonly reserved only for molecular species. NON-TECHNICAL SUMMARY:Metal-organic frameworks are a new class of solid materials with porous network structures the surfaces of which can be chemically modified to suit a wide range of potential applications, notably gas storage, chemical separations, and catalysis. By adapting these materials to be electrically conductive through the movement of ions and electrons, new phenomena will be explored that are of fundamental interest in chemistry, energy storage, and condensed matter physics. This work will expand the understanding of how to control the formation of new materials and manipulate the electronic and ionic charge transport properties therein. With the support of the Solid State and Materials Chemistry program in the Division of Materials Research, new porous materials will be created of potential interest as component materials in advanced batteries, electrocatalysis, thermoelectric devices, and ultra-capacitors. In doing so, this work will broadly impact these key technologies, resulting in a legacy of new synthetic techniques and a fundamental understanding of conductive materials, while additionally contributing to the education and training of undergraduate, graduate, and postdoctoral students in the synthesis and characterization of new materials. As a related endeavor, the principle investigator will continue to lead an effort in the Department of Chemistry at UC Berkeley to found a materials chemistry major.

技术摘要：在材料研究部固态和材料化学计划的支持下，将开发新的合成策略，以追求具有易于的离子和/或电子电荷迁移率的金属有机框架。预计金属有机框架的合成可调节性有望刺激对新物理现象的询问，例如纳米尺度孔隙限制效应和以框架为中心的离子迁移率和以框架为中心的电荷分布，以及一维材料中的电子相关性，以及低维系统的电子和磁性。这种研究对其潜在的电池应用，例如电极或固体电解质组件材料，电催化，热电设备和超伴能的潜在电池都引起了人们的关注。具有高离子迁移率的多孔材料可以通过使框架具有离域或以其他方式无法接近的费用来制备，以产生未协调的和孔隙固定的单离子导体。这将包括制备含有离子金属簇的材料，离子有机接头，包含笨重的柜台以及与离子身份，孔隙尺寸，毛孔地形，框架拓扑结构和结晶石形态相对于离子迁移率趋势的表征。利用金属有机框架的模块化性质，以便在材料的无机和有机成分中包括可逆的氧化还原伴侣，将针对新的电子导电框架。还将探讨此类材料中尚未开发的其他合成策略。这将包括沿金属中心一维链的电子相关性的优化，稳定有机自由基的包含以及通过配体功能化和不良客体物种来调整频带结构。这样做将允许从基本协调化学的角度研究多孔结构中的电荷迁移率，这是一种通常仅用于分子物种的技术。非技术摘要：金属有机框架是一类新的具有多孔网络结构的固体材料，可以对其表面进行化学修改以适合广泛的潜在应用，尤其是气体存储，化学分离和催化。通过通过离子和电子的移动来调整这些材料是导电性的，将探索对化学，储能和冷凝物理物理学具有基本兴趣的新现象。这项工作将扩展对如何控制新材料形成并操纵其电子和离子电荷传输特性的理解。在材料研究部中的固态和材料化学计划的支持下，将创建新的多孔材料，以作为高级电池，电催化，热电设备和超摄影师的组件材料的潜在兴趣。在此过程中，这项工作将广泛影响这些关键技术，从而产生新的合成技术的遗产以及对导电材料的基本理解，同时还为新材料的合成和表征的本科生，研究生和博士后学生的教育和培训提供了贡献。作为一项相关的努力，主要研究人员将继续领导加州大学伯克利分校化学系的努力，以建立材料化学专业。