RUI: An Experimental and Theoretical Study of Stannylcarbenes

RUI：锡烷基卡宾的实验和理论研究

• 批准号: 1955874
• 负责人: Dasan Thamattoor
• 金额: $ 32万
• 依托单位: Colby College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1955874&HistoricalAwards=false
• 关键词: RUI; Experimental; Theoretical; Study; Stannylcarbenes

In this RUI project, funded by the Chemical Structure, Dynamics & Mechanism B Program of the Chemistry Division, Professor Thamattoor of the Department of Chemistry at Colby College, and his team of undergraduate students, are investigating tin-substituted carbenes by experimental and theoretical methods. Carbenes are highly reactive chemical species which feature a carbon that has only two bonds instead of the usual four. Carbenes that are coordinated with a variety of metals have played important roles in the production of commercially valuable materials. However, much less is known about carbenes in which one or both bonds of the carbon are attached to a metal. This research aims to address this gap in knowledge. This project also includes efforts to persuade high school students to consider STEM (Science, Technology, Engineering and Mathematics) disciplines in college. Professor Thamattoor provides research opportunities to high school students in the laboratory. The group also works with teachers in the local grade schools to deliver quality instruction in STEM subjects. In recognition of the importance of global scientific cooperation, undergraduate students are provided with research opportunities in international laboratories.Metal-coordinated carbene complexes are well known compounds that have had a transformative impact on synthesis and catalysis. In contrast, very little is known about uncomplexed metal-substituted carbenes, where the metal is one (or both) of the substituents on the divalent carbon. Through this RUI (Research at Undergraduate Institutions) grant, a comprehensive set of projects is being undertaken to study stannylcarbenes. These intermediates are generated photochemically from new precursors based on cyclopropanated phenanthrene and indan systems. The structure and reactivity of these tin-substitued carbenes are investigated experimentally by steady state photolysis, electron paramagnetic resonance spectroscopy, matrix isolation spectroscopy, and time-resolved laser flash photolysis, as well as by modern computational methods. In addition, several initiatives to create international research opportunities for undergraduates, and to promote high-quality STEM education for grade K -12 students in area schools are being pursued. The integrated research and outreach activities enrich the undergraduate research experience at Colby College, and also serve the local community.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.

在这个由化学结构，动力学和机制B计划资助的RUI项目中，Colby College化学系教授及其本科生的团队正在研究通过实验和理论方法研究锡取代的Carbenes。卡宾斯是高反应性化学物种，具有仅具有两个键而不是通常的四个键的碳。与各种金属协调的卡宾斯在商业有价值的材料的生产中起着重要作用。但是，关于碳碳的一个或两种键都附在金属上的卡宾斯知之甚少。这项研究旨在解决知识的这一差距。该项目还包括说服高中生考虑大学中的STEM（科学，技术，工程和数学）学科的努力。 Thamattoor教授为实验室的高中生提供了研究机会。 该小组还与当地小学的老师合作，​​在STEM学科中提供高质量的教学。为了认识到全球科学合作的重要性，在国际实验室中为本科生提供了研究机会。METAL协调的Carbene综合体是众所周知的化合物，对合成和催化产生了变革性的影响。相比之下，对于未经孔的金属取代的碳烯而言，金属是二价碳上的取代基的一种（或两者）。 通过此RUI（本科机构的研究）赠款，正在进行一系列研究Stannylcarbenes的项目。 这些中间体是基于环丙烷的光毒和Indan系统的新前体产生的。通过稳态光解，电子顺磁共振光谱，基质分离光谱和时间分辨的激光闪光照射溶解以及通过现代计算方法，通过稳态光解，电子顺磁共振光谱，基质分离光谱以及通过现代计算方法来研究这些锡实现的碳烯的结构和反应性。此外，正在追求几项为本科生创造国际研究机会的举措，并促进针对地区学校中K -12年级学生的高质量STEM教育。综合研究和外展活动丰富了科尔比学院的本科研究经验，并为当地社区提供服务。该奖项反映了NSF的法定任务，并且使用基金会的知识分子优点和更广泛的审查标准，被认为值得通过评估来获得支持。