An Isotopic Probe into Electron Distribution in Aromatics and Homoaromatics

芳香族化合物和同系芳香族化合物中电子分布的同位素探测

• 批准号: 9412036
• 负责人: Cheryl Stevenson
• 金额: $ 13.75万
• 依托单位: Board of Trustees of Illinois State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-15 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9412036&HistoricalAwards=false
• 关键词: Isotopic; Probe; into; Electron; Distribution

This RUI grant from the Organic Dynamics Program supports the continuing work of Professor Cheryl Stevenson at Illinois State University to study anions and anion radicals of annulene and homoannulenes. These NMR and EPR spectroscopic studies will make use of deuterium isotopic perturbation techniques. The four focal point of research are the determination of equilibria between ring-opened and ring-closed 16 annulene structures, the characterization of the electron distribution in sigma-bonded 16 - 8 - and 16 - 6 -bisannulenes, the analysis of the deuterium effect on the splitting of the degeneracy of non-bonding orbitals of 8 - and 16 -annulenes, and the isotope effect of the solution electron affinity of pyrene. In this project Dr. Stevenson will conduct spectroscopic studies on dianions and anion radicals of differently sized annulenes. Her undergraduate research employs the deuterium isotopic perturbation technique to investigate their bonding properties and electronic distributions. The fundamental studies on the isotope effect on orbital splitting and solution electron affinities will be supported by collaborative theoretical studies.

来自有机动力学项目的RUI拨款支持伊利诺伊州州立大学谢丽尔·史蒂文森教授继续研究轮烯和高轮烯的阴离子和阴离子自由基。这些NMR和EPR光谱研究将利用氘同位素微扰技术。研究的四个重点是确定开环和闭环16轮烯结构之间的平衡，表征σ键合的16 - 8 -和 16 - 6 -双轮烯，氘对8 -和16 -轮烯非键轨道简并度分裂的影响分析，以及芘溶液电子亲合势的同位素效应。 在这个项目中，史蒂文森博士将对不同大小的轮烯的二价阴离子和阴离子自由基进行光谱研究。她的本科研究采用氘同位素微扰技术来研究它们的成键性质和电子分布。同位素对轨道分裂和溶液电子亲合势的影响的基础研究将得到合作理论研究的支持。