CAREER: SusChEM: Electron Transfer Mechanisms in Metal Organic Framework Thin Films

在这个由化学部化学结构、动态和机理B计划以及材料研究部固态和材料化学计划资助的职业项目中，弗吉尼亚理工学院和州立大学化学系的Amanda Morris教授正在探索金属有机骨架薄膜阵列的光学和电学性质。该项目的目标是学习如何控制这些特性，并帮助开发能够将太阳能转化为化学燃料的人造光合作用组件，以便长期储存和使用。该项目解决了许多科学学科(化学、物理和生物学)之间的关键的、当今的环境和能源技术挑战。在高中一级，正在开发四个实验室模块，以通过高中科学计划的完整顺序和范围来补充弗吉尼亚学习标准。这些单元为不同的学生群体提供了真实世界应用的实验室体验，并为教师提供了将课程应用于当今最活跃的研究领域之一的机会。这一组成部分被纳入一门名为“未来的能源”的新本科课程，该课程提倡本科生的研究经验，强调能源科学的跨学科性质，涉及文献研究、客座讲座和实验室实验。金属有机骨架(MOF)是一类固态无机-有机杂化材料，它结合了非均质材料的稳定性和分子络合物的合成多样性。本研究旨在揭示金属有机骨架的分子结构和三维结构与观察到的电子输运性质之间的关系。在这个项目中，我们探索了一系列系统变化的金属有机骨架结构：(1)阐明了电化学电子通过MOF薄膜的传输机制；(2)确定了电子和离子扩散对表观双极扩散系数的贡献；(3)揭示了MOF阵列中高效光致电荷传输的指导原则。这些目标是通过结晶学确定的结构与电化学和脉冲激光光谱学测量的效率和机理的关联来实现的。作为提议的一部分，一个实践教育项目利用研究领域的广度和吸引力来培养未来的高中水平的科学家和教师。

In this CAREER project funded by the Chemical Structure, Dynamic & Mechanism B Program of the Chemistry Division and the Solid State and Materials Chemistry Program in the Division of Materials Research, Professor Amanda Morris of the Department of Chemistry at Virginia Polytechnic Institute and State University is exploring the optical and electronic properties of metal organic framework thin films arrays. The goal of the project is to learn how to control these properties and aid in the development of artificial photosynthetic assemblies capable of converting solar energy into chemical fuels for long-term storage and use. The project addresses critical, present-day environmental and energy technology challenges at the interface of many scientific disciplines (chemistry, physics, and biology). At the high school level, four laboratory modules are being developed to complement the Virginia Standards of Learning through the full sequence and scope of the high school science program. These modules provide laboratory experiences with real-world applications to a diverse population of students and afford the opportunity for teachers to apply the curriculum to one of today's most active research fields. This component feeds into a new undergraduate course entitled "Energy Sources of the Future," which promotes undergraduate research experiences, emphasizes the cross-disciplinary nature of energy science, and involves literature studies, guest lectures, and laboratory experiments.Metal organic frameworks (MOF) are a class of solid-state inorganic-organic hybrid materials that combine the stability of heterogeneous materials with the synthetic diversity of molecular complexes. The research aims to discover the relationship between the molecular and three-dimensional structure of metal organic frameworks and observed electron transport properties. In this project, a series of systematically varied metal organic framework structures are explored to: (1) Elucidate the mechanism of electrochemical electron transport through MOF thin films; (2) Determine the contributions of electronic and ionic diffusion to apparent ambipolar diffusion coefficients; (3) Uncover the guiding principles to efficient photo-induced charge transport in MOF arrays. These objectives are accomplished through the correlation of structure, as determined by crystallography, to efficiency and mechanism, as measured by electrochemistry and pulsed-laser spectroscopy. As part of the proposal, a hands-on educational program capitalizes on the breadth and appeal of the research area to educate future scientists and teachers at the high school level