Controlling Magnetic Excitation Pathways via Molecular Design of Anisotropic Dipolar Spin Arrays

通过各向异性偶极自旋阵列的分子设计控制磁激发路径

• 批准号: 2154830
• 负责人: Jeffrey Rinehart
• 金额: $ 48万
• 依托单位: University of California-San Diego
• 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=2154830&HistoricalAwards=false
• 关键词: Controlling; Magnetic; Excitation; Pathways; via

With support from the Chemical Structure, Dynamics & Mechanisms-B Program of the Chemistry Division, Jeffrey D. Rinehart of the Department of Chemistry and Biochemistry at the University of California, San Diego and his research team will work toward the design of magnetic interactions at the single molecule level. The team is targeting a specific set of materials that interact via intuitive and controllable mechanisms akin to normal bar magnets, despite their quantum mechanical nature. Access to these new materials has the potential to offer new avenues to the design of quantum spin interactions from the bottom up. The insight garnered from the group’s research will be used to hone fundamental models of spin relaxation and offer new entanglement mechanisms in quantum information science. This project combines subjects of inorganic, organic, theoretical, and computational chemistry and will be conducted primarily by graduate and undergraduate students at University of California, San Diego. Outreach within the scope of this project will be a collaboration with the Preuss School UC San Diego, a charter school for middle and high school low-income scholars with goals to become first-generation college students. Controlling the spin wavefunction of high moment, high anisotropy lanthanide-based molecules requires broadly applicable and feasibly implementable synthetic guidelines both to optimize desired magnetic properties in distinct units and to extend into materials of higher dimensionality. Many approaches have been pursued in this regard, including optimizing the crystal field to maximize single-ion anisotropy and promoting strong orbital exchange interactions between magnetic metal centers. Emphasizing control and versatility, this work attempts to develop a general strategy to emergent complexity through a building block approach based on the magnetic dipolar interaction between highly anisotropic units. Preliminary work has established that magnetic orientational anisotropy is consistently and predictably enforced for an erbium ion (Er3+) when bound to a cyclooctatetraene dianion, leaving other ligand sites available to establish connectivity. The predictable magnitude and direction of the magnetic moment allow intuitive design of through-space dipolar interaction pathways. The synthetic accessibility and flexibility of the magnetic building unit should allow for tight control of molecular structure to modify, test, and describe this interaction across symmetry, angular, and dimensional parameter space, creating the potential for a wavefunction-by-design approach to molecular spin dynamics.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.

在化学结构的支持下，加利福尼亚大学，圣地亚哥大学的Stry和生物化学的Jeffrey D. Rinehart和他的研究团队Wild the Magnetics Interactions Att Att Att Att Att Att Att通过互动和可控的机制通过相互作用，尽管它们的量子机械性质具有对量子的量子，但它们的量子可能会提供新的途径。主要由加利福尼亚大学和加利福尼亚大学，与Preusss School San Diego合作，这是一所中学和高中低收入学校的特许学校。在晶体场中采用了适用的和捕食的合成指南，以优化不同单元中所需的磁性和扩展更高维度的MAA。 。磁性建筑单元的偶极相互作用途径可实现紧密的控制丧失，测试角和尺寸参数空间，这可能是通过设计到分子旋转动力学的潜力离子，并被认为是通过使用Teundation的知识分子优点和更广泛影响的审查标准的评估值得支持的。