CAS-Climate: RUI: Systematic trends of structure-property relations of metal-organic frameworks built from mixed transition metal ions

CAS-Climate：RUI：混合过渡金属离子构建的金属有机框架结构-性能关系的系统趋势

• 批准号: 2221965
• 负责人: Bangbo Yan
• 金额: $ 25.1万
• 依托单位: Western Kentucky University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2221965&HistoricalAwards=false
• 关键词: CAS; Climate; RUI; Systematic; trends

PART 1: NON-TECHNICAL SUMMARY The need for alternative energy sources becomes essential for the growing global population with the dwindling fossil deposits on earth. Moreover, severe environmental problems caused by pollutants from fossil fuels are also imperative driving forces for seeking renewable green energy sources. It is well known that carbon dioxide reductions under sunlight and appropriate photocatalysts are a tremendous potential technology for solving the problem. With the support from the Solid State and Materials Chemistry program in the Division of Materials Research, Bangbo Yan and Pauline Norris of Western Kentucky University, a predominantly undergraduate institution, develop new metal-organic framework (MOF) materials, which contain new metal complexes with two different types of transition metal ions that are connected by an organic ligand. These materials possess an essential feature: they can absorb visible light through one type of metal center and by electron transfer, for example, catalyze carbon dioxide reduction reactions through the other type of metal center using this light energy. The principal investigators and their students study how the identity of the transition metal ions and ligands could affect the photocatalytic properties of the new MOFs. These new MOFs and fundamental materials chemistry insights gained from this study can help control climate change and carbon footprint if they are integrated into devices for harvesting solar energy and catalyzing carbon dioxide reduction in the future. Beyond these scientific and potentially technological impacts, this project also provides valuable research opportunities in STEM to undergraduates at WKU and to local high school students, including those from underrepresented groups.PART 2: TECHNICAL SUMMARY For this project, which is supported by the Solid State and Materials Chemistry program in the Division of Materials Research, the principal investigators synthesize and study novel MOFs consisting of metal-complex sensitizers and reactive centers. They hypothesize that it is possible to design MOFs that absorb visible light through one type of metal center and by electron transfer, for example, catalyze carbon dioxide reduction reactions through another type of metal center with an open metal site using this light energy. To this end they pursue three distinct objectives aimed at studying the synthesis and structure-property correlations at the fundamental materials chemistry level: The first objective is to design and study the role and effect of the identity of 3d transition metal ions in hetero-metal MOFs; the second objective is to determine the effect of changing the identity of metal ions (3d, 4d, or 5d) as a sensitizer in hetero-metal MOFs; and the third is to identify the ligand effects for hetero-metal MOFs as photocatalytic reduction of carbon dioxide. The discoveries are expected to provide an essential theory for the design and construction of new MOFs with potential applications as photocatalysts and beyond. Such new materials for solar energy harvesting and carbon dioxide reduction can potentially help control climate change and control the carbon footprint. In addition, research students (including undergraduate and high school students) receive training and education in chemistry through this research project. Through their scientific research experience, scientific writing, and presentation at regional/national conferences, students gain valuable training in critical thinking, scientific methods, writing skills, and communication skills.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

第1部分：非技术摘要对替代能源的需求对于不断增长的全球人口至关重要，而地球上的化石沉积物减少了。此外，化石燃料污染物引起的严重环境问题也是寻求可再生绿色能源的必要驱动力。众所周知，阳光下的二氧化碳减少和适当的光催化剂是解决该问题的巨大潜在技术。在材料研究部固态和材料化学计划的支持下，西肯塔基大学的Bangbo Yan和Pauline Norris是一家主要是本科生的机构，开发了新的金属有机框架（MOF）材料，这些材料包含新的金属配合物，这些金属配合物与两种不同类型的过渡金属离子与有机体相连。这些材料具有重要的特征：它们可以通过一种类型的金属中心吸收可见光，并通过电子传输来吸收可见光，例如，使用这种光能通过其他类型的金属中心催化二氧化碳的还原反应。主要研究人员及其学生研究过渡金属离子和配体的身份如何影响新MOF的光催化特性。如果将这些新的MOF和基本材料化学见解从这项研究中获得的洞察力可以帮助控制气候变化和碳足迹，如果将它们整合到未来收集太阳能并催化二氧化碳减少的设备中。 Beyond these scientific and potentially technological impacts, this project also provides valuable research opportunities in STEM to undergraduates at WKU and to local high school students, including those from underrepresented groups.PART 2: TECHNICAL SUMMARY For this project, which is supported by the Solid State and Materials Chemistry program in the Division of Materials Research, the principal investigators synthesize and study novel MOFs consisting of metal-complex sensitizers and reactive centers.他们假设可以设计通过一种金属中心吸收可见光的MOF，并通过电子传输来设计可见光，例如，使用这种光能，通过另一种类型的金属中心催化二氧化碳的还原反应。为此，他们追求了三个旨在研究基本材料化学水平的综合和结构特性相关性的不同目标：第一个目标是设计和研究杂型金属MOF中3D过渡金属离子身份的作用和影响；第二个目标是确定改变金属离子（3D，4D或5D）作为杂种MOF中敏化剂的效果；第三是将异源MoFS的配体效应鉴定为二氧化碳的光催化还原。这些发现有望为新的MOF的设计和建造提供一种重要的理论，该MOF具有潜在的光催化剂及以后的潜在应用。这种用于太阳能收集和二氧化碳还原的新材料可能有助于控制气候变化并控制碳足迹。此外，研究学生（包括本科生和高中生）通过该研究项目接受化学培训和教育。通过他们在区域/民族会议上的科学研究经验，科学写作和演讲，学生在批判性思维，科学方法，写作技巧和沟通技巧方面获得了宝贵的培训。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的审查标准通过评估来通过评估来支持的。