RUI: Linear trimers of Fe, Co, and Ni with unique structural, magnetic, and electrochemical properties

RUI：Fe、Co 和 Ni 的线性三聚体，具有独特的结构、磁性和电化学特性

• 批准号: 1762401
• 负责人: Gary Guillet
• 金额: $ 20.55万
• 依托单位: Georgia Southern University Research and Service Foundation, Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-08-15 至 2022-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1762401&HistoricalAwards=false
• 关键词: RUI; Linear; trimers; Fe; Co

This project is funded by the Chemical Synthesis Program in the NSF Chemistry Division. Dr. Gary Guillet of Georgia Southern University's Armstrong Campus investigates strategies to synthesize compounds containing three metal ions and two metal-metal bonds with the atoms and bonds arranged linearly. The study of metal-metal bonding is an area of intense research because of the unique properties of compounds that contain this type of bond. While there are many examples of compounds that contain two metal ions with a metal-metal bond between them, there is a dearth of compounds containing a larger number of metals with metal-metal bonding. Even more rare are compounds with metal-metal bonds that are linked in series. Dr. Guillet investigates the factors that affect the strength of the bonding, and the physical properties and reactivity of the compounds. This adds significantly to the understanding of metal-metal bonding within multi-metallic compounds and impacts fields such as molecular wire design. The student body of the Armstrong campus is diverse group and many students are minorities underrepresented in the chemical sciences. About 37% of the chemistry and biochemistry majors are first generation college students. In order to close the education gap in science, technology, engineering, and mathematics, it is critical to expand access to research experiences for students. Institutional data clearly shows that students graduate faster if they participate in undergraduate research compared to their peers. With funding from this grant, Dr. Guillet is mentoring and promoting these students.Dimetallic complexes of transition metals are abundant and thoroughly studied. However, extending these compounds by addition of a third metal forming linear, trimetallic, complexes is synthetically challenging and there is a dearth of these complexes. Most examples that exist of trimetallic complexes are supported using the ligand dipyridylamine. Novel trimetallic complexes are required to study the properties of these extended systems and new ligands are needed for this purpose. Dr. Guillet is investigating the synthesis of a novel ligand family designed to support trimetallic complexes of Fe, Co, and Ni. The physical properties of these complexes are being examined using multinuclear NMR, X-ray diffractometry, UV-Vis spectroscopy, and IR spectroscopy. Dr. Guillet is also investigating the reactivity using electrochemistry as well as synthetic redox reactions. Work on this project is expanding the understanding of ligand characteristics necessary to support trimetallic complexes and elucidate the characteristics of metal-metal communication.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.

该项目由NSF化学部的化学合成计划资助。佐治亚州南部大学阿姆斯特朗校园的Gary Guillet博士调查了策略，以综合包含三种金属离子和两个金属金属键的化合物，并与原子和键线性排列。金属金属键的研究是一项激烈研究的领域，因为包含这种键的化合物的独特特性。尽管有许多含有两个金属离子具有金属金属键的化合物的实例，但缺乏含有金属金属键的较大金属的化合物。更罕见的是具有串联的金属金属键的化合物。 Guillet博士研究了影响粘合强度的因素，以及化合物的物理特性和反应性。这大大增加了对多金属化合物中金属金属键的理解，并影响了诸如分子线设计等领域。阿姆斯特朗校园的学生团体是多元化的群体，许多学生在化学科学中的人数不足。大约37％的化学和生物化学专业是第一代大学生。为了缩小科学，技术，工程和数学方面的教育差距，扩大学生研究经验的访问至关重要。机构数据清楚地表明，与同龄人相比，学生参加本科研究的速度更快。借助这笔赠款的资助，吉利特博士正在指导和促进这些学生。过渡金属的双层综合体丰富且详尽地研究。但是，通过添加第三个金属形成线性，三金属的复合物来扩展这些化合物在合成方面具有挑战性，并且缺乏这些复合物。使用配体二吡啶基胺支持三金属复合物存在的大多数示例。需要新颖的三金属复合物来研究这些扩展系统的性质，并为此目的需要新的配体。 Guillet博士正在研究一个新型配体家族的合成，该家族旨在支持FE，CO和NI的三金属复合物。这些复合物的物理特性正在使用多核NMR，X射线衍射法，UV-VIS光谱和IR光谱法检查。 Guillet博士还使用电化学以及合成氧化还原反应研究了反应性。该项目的工作正在扩大对支持三金属络合物并阐明金属 - 金属交流特征所必需的配体特征的理解。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评估来支持的，并具有更广泛的影响标准。