Magnetization and Electron Spin Dynamics of New Molecular 4f Architectures

在化学学部化学结构、动力学和机理b项目的支持下，德克萨斯农工大学化学系的Michael Nippe和他的学生们正致力于合成和研究几种有潜力成为分子磁铁的有趣化合物的磁化和电子自旋动力学。识别分子自旋流形的结构-功能关系对于理解如何控制和调整自旋动力学至关重要，并将为量子信息科学提供新的分子平台。从事该项目的研究生将成为合成化学以及研究新分子所需的磁性和光谱技术方面的专家。科学、技术、工程及数学专业的安全大使，尤其致力促进STEM（科学、技术、工程及数学）范畴的多元化，并致力推广及改善本署的安全文化。PI还倡导STEM领域的职业道路，并在美国全国水晶种植竞赛中担任区域协调员。这项积极的外展计划针对全国K-12学生和教师，并提供晶体生长的第一手实践经验。根据该奖项，由德克萨斯农工大学Michael Nippe领导的研究小组旨在提供迄今为止未知的自旋流形的合成途径，从而增加对有机金属超顺磁体自旋动力学的基本理解。该项目将研究(1)基于4f元素新型强场硼化物配合物的高性能单分子磁体（SMMs），(2)具有强4f···4f相互作用和磁耦合基态的异金属4f金属配合物的温度和磁场依赖性，以及(3)具有自旋受挫和环形磁基态的新型有机金属平台的电子自旋相干时间，这些电子自旋可以与稀土离子的电子自旋相耦合。就更广泛的科学影响而言，该项目中开发的分子自旋流形在量子信息技术中具有未来应用的潜力。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

With support from the Chemical Structure, Dynamics & Mechanisms-B Program of the Chemistry Division, Michael Nippe and his students in the Department of Chemistry at Texas A&M University are targeting the synthesis and study of the magnetization and electron spin dynamics of several interesting classes of compounds with potential as molecular magnets. Identifying structure-function relationships of molecular spin manifolds is essential for the understanding of how spin dynamics can be controlled and tuned and will lead to new molecular platforms for quantum information science. Graduate students working on this project will become experts in synthetic chemistry as well as in magnetic and spectroscopic techniques that are needed to study the new molecules. The PI is particularly dedicated to increasing diversity in the STEM (science, technology, engineering and mathematics) areas as well as an ambassador for laboratory safety and is a promoting and improving the departmental safety culture. The PI also advocates for career paths in the STEM areas and takes a leading role as regional coordinator in the national US Crystal Growing Competition. This active outreach program targets K-12 students and teachers across the country and provides first hands-on experience in crystal growth.Under this award, the research team led by Michael Nippe at Texas A&M University aims to provide synthetic access to hitherto unknown spin manifolds and in so doing increase fundamental understanding of spin dynamics in organometallic superparamagnets. The program will study (1) high-performance single-molecule magnets (SMMs) based on novel strong field borolide complexes of 4f elements, (2) temperature and magnetic field dependence of heterometallic 4f metal complexes with strong 4f···4f interactions and magnetically coupled ground states, and (3) electron spin coherence times of new organometallic platforms that exhibit spin frustration and toroidal magnetic ground states that can be coupled to electron spins of a rare earth ion. In terms of broader scientific impact, the molecular spin manifolds being developed in this project have potential for future application in quantum information technologies.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.