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.

在化学司的化学结构，动力学B（CSDM-B）计划的支持下，康奈尔大学化学和化学生物学系的凯尔·兰卡斯特（Kyle Lancaster）正在开发具有有趣的电子和结构特性的两种和伪辅助过渡金属配合物的新类别。 这项研究的目的是利用这些超低坐标过渡金属复合物的特性，以发现用于群体转移反应的新催化剂以及新的存储技术的开发，即基于单分子磁铁（SMM）的催化剂，以满足逐渐较小形式的数据存储能力的挑战。该项目协同无机合成，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学生以及公众的外展活动。 最近的研究表明，开放壳，低坐标过渡金属复合物是几种重要反应的廉价催化剂，并证明了令人鼓舞的SMM行为。在此项目中，将解决以下问题：1）笨重的1,8-二芳基拟合的羰基可以用来通常合成杂色的，两坐标的过渡金属复合物吗？ 2）这些配体能否支持伪为坐标环境中的减少金属中心？ 3）次级相互作用在多大程度上稳定反应性金属配体连接？ 4）在多大程度上可以使用杂型和金属身份来调整复合物的电子结构并影响其磁性特性？该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛影响的评估来审查标准的评估。