Harnessing Pseudo One- and Two-Coordination for Reactivity and Magnetism

利用伪一配位和二配位来实现反应性和磁性

• 批准号: 2155120
• 负责人: Kyle Lancaster
• 金额: $ 45万
• 依托单位: Cornell 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=2155120&HistoricalAwards=false
• 关键词: Harnessing; Pseudo; Two; Coordination; Reactivity

With support from the Chemical Structure, Dynamics & Mechanisms-B (CSDM-B) Program of the Chemistry Division, Kyle Lancaster of the Department of Chemistry and Chemical Biology at Cornell University is developing new classes of two- and pseudo-one-coordinate transition metal complexes with interesting electronic and structural properties. The goal of this research is to exploit the characteristics of these ultra-low-coordinate transition metal complexes for the discovery of new catalysts for group transfer reactions, as well as the development of new storage technologies, namely those based on single molecule magnets (SMMs), to meet the challenge of increasing data storage capacity in progressively smaller form factors. The project synergizes concepts of inorganic synthesis, materials chemistry, and physical chemistry, and is well suited as educational training for chemistry graduate students. Outreach activities involving K-12 students as well as the general public will also be supported by this project. Recent studies have showcased the potential of open-shell, low-coordinate transition metal complexes as inexpensive catalysts for several important reactions and have demonstrated encouraging SMM behavior. In this project, the following questions will be addressed: 1) can bulky 1,8-diarylsubstituted carbazoles be used to generally synthesize heteroleptic, two-coordinate transition metal complexes? 2) Can these ligands support reduced metal centers in pseudo-one-coordinate environments? 3) To what extent do secondary interactions stabilize reactive metal ligand linkages? 4) To what extent can heterolepticity and metal identity be used to tune the electronic structures of the complexes and influence their magnetic properties?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.

在化学系化学结构、动力学和机理-B (CSDM-B) 项目的支持下，康奈尔大学化学与化学生物学系的凯尔·兰卡斯特 (Kyle Lancaster) 正在开发新类别的二配位和伪一配位跃迁具有有趣的电子和结构特性的金属配合物。 这项研究的目标是利用这些超低配位过渡金属配合物的特性来发现用于基团转移反应的新催化剂，以及开发新的存储技术，即基于单分子磁体（SMM）的存储技术。 ），以应对在逐渐缩小的外形尺寸中增加数据存储容量的挑战。该项目融合了无机合成、材料化学和物理化学的概念，非常适合作为化学研究生的教育培训。该项目还将支持涉及 K-12 学生和公众的外展活动。 最近的研究展示了开壳、低配位过渡金属配合物作为几种重要反应的廉价催化剂的潜力，并证明了令人鼓舞的 SMM 行为。在该项目中，将解决以下问题：1）大体积1,8-二芳基取代咔唑能否用于一般合成杂配位、双配位过渡金属配合物？ 2）这些配体可以在伪单配位环境中支持还原的金属中心吗？ 3）二次相互作用在多大程度上稳定反应性金属配体连接？ 4) 在多大程度上可以利用异配性和金属特性来调节配合物的电子结构并影响其磁性？该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查进行评估，被认为值得支持标准。