RUI:CAS:Reaction Dynamics of Anderson-Type Polyoxometalate Ions in Aqueous Solution: Relating Solid-State Structures with Solution-State Properties

RUI:CAS:安德森型多金属氧酸盐离子在水溶液中的反应动力学：将固态结构与溶液态性质联系起来

• 批准号: 2155190
• 负责人: Eric Villa
• 金额: $ 20.58万
• 依托单位: Creighton 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: 2022-08-01 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2155190&HistoricalAwards=false
• 关键词: RUI; CAS; Reaction; Dynamics; Anderson

WIth support from the Chemical Structure, Dynamics & Mechanisms-B (CSDM-B) Program of the Chemistry Division and the Established Program to Stimulate Competitive Research (EPSCoR), Eric Villa of the Department of Chemistry and Biochemistry at Creighton University is focused on determining how the structural features of simple polyoxometalate ions (predominately-anionic metal-oxide clusters) affect their reactivity in aqueous solution. The range of applications for these polyoxometalate (POM) ions is wide, with properties including antiviral/antitumor activity, acid catalysis, water oxidation catalysis, MRI contrast agents, luminescent and magnetic materials, and potentially radioactive waste treatment. The goal of this research is to understand how POMs react in aqueous solution and what controls their reactivity in solution. The resulting data from this project will allow for POMs to be better tuned for these important applications. This project engages undergraduate students in fundamental research and gains them training in inorganic chemistry, which includes several analytical techniques and instrumental methods. Undergraduate students will also be involved in the set-up and delivery of a middle school chemistry summer camp focusing on inorganic chemistry. This project focuses on understanding the stability and reactivity of Anderson-type POM ions (XMo6O24z-) in aqueous solution. Here, the primary goal is to pinpoint how changes in the identity of atom X alters the ion’s properties in aqueous solution to be able to correlate structure-property relationships. The Anderson-type POM has only three types of structural oxygen, making it an ideal structure for undergraduate researchers to appreciate the complexities of aqueous solution reactivity. Importantly, the general reactivity trends of POMs in aqueous media have not been clearly identified and still have many unanswered questions: 1) What types of oxygen sites exchange the fastest? 2) What affects only a single site versus what affects the entire unit? 3) What structural properties (bond lengths, charge state or protonation) correlate with reactivity? 4) How general are the trends observed? 5) Critically, can the reactivity of POMs in water be easily predicted? 6) Finally, how do single, targeted metal substitutions affect the ability of the POM to make stable complexes with surrogates of radioactive cations for remediation purposes? The small Anderson-type POMs will allow undergraduate researchers to confidently probe the above questions and the data collected will allow for the ability to better tune these ions to their impressive set of applications.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.

WIth support from the Chemical Structure, Dynamics & Mechanisms-B (CSDM-B) Program of the Chemistry Division and the Established Program to Stimulate Competitive Research (EPSCoR), Eric Villa of the Department of Chemistry and Biochemistry at Creighton University is focused on determining how the structural features of simple polyoxometalate ions (predominately-anionic metal-oxide clusters) affect their reactivity in aqueous solution.这些二极化甲酸盐（POM）离子的应用范围宽，具有抗病毒/抗肿瘤活性，酸催化剂，水氧化催化剂，MRI对比剂，发光和磁性材料以及潜在放射性废物处理。这项研究的目的是了解POM在水溶液中的反应以及如何控制其在溶液中的反应性。该项目的结果数据将使POM可以更好地针对这些重要应用程序进行调整。该项目吸引了本科生进行基础研究，并获得了无机化学培训，其中包括几种分析技术和工具方法。本科生还将参与以无机化学为重点的中学化学夏令营的设置和交付。该项目的重点是理解水溶液中Anderson型POM离子（XMO6O24Z-）的稳定性和反应性。在这里，主要目标是指出原子x身份的变化如何改变水溶液中离子的特性，以便能够关联结构 - 繁星关系。 Anderson型POM只有三种类型的结构氧，使其成为本科研究人员欣赏水溶液反应性复杂性的理想结构。重要的是，尚未清楚地识别出水性介质中POM的一般反应性趋势，并且仍然有许多未解决的问题：1）哪些类型的氧气位点交换最快？ 2）什么仅影响一个站点，而什么影响整个单元？ 3）哪些结构特性（键长，电荷状态或质子化）与反应性相关？ 4）观察到趋势的普遍性？ 5）至关重要的是，水在水中的反应性可以很容易预测吗？ 6）最后，单个靶向金属取代如何影响POM与放射性阳离子替代物的稳定复合物的能力？小安德森型POM将允许本科研究人员自信地探究上述问题，收集的数据将使这些离子能够更好地调整这些离子的能力。该奖项反映了NSF的法定任务，并通过使用该基金会的知识分子和更广泛的影响来评估NSF的法定任务，并被认为是珍贵的支持。