The Study of Radicals Using a Pulsed Beam Fourier Transform Microwave Spectrometer

脉冲束傅里叶变换微波光谱仪对自由基的研究

• 批准号: 9423355
• 负责人: Stewart Novick
• 金额: --
• 依托单位: Wesleyan University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-01 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9423355&HistoricalAwards=false
• 关键词: Study; Radicals; Using; Pulsed; Beam

In this project in the Physical Chemistry program of the Chemistry Division, Professor Stewart Novick of the Chemistry Department of Wesleyan University will conduct a series of investigations on the structures of transient free radicals by means of pulsed-jet Fabry-Perot Fourier-transform microwave spectroscopy using a new instrument constructed at Wesleyan University. Among the species to be studied are those of chemical as well as astro-chemical interest. Some radical-containing van der Waals complexes will also be investigated. A free radical may defined as a reactive transient molecular species in the gas phase. A more conventional definition is that of a molecule, or molecular fragment, with one or more unpaired electrons. These species are highly reactive, elusive, hard to produce, and usually difficult to study. However, these radicals are extremely important, both as intermediates in chemical reactions and as a species in their own right. Many of the interstellar molecules that have been discovered by radio astronomy are, in fact, radicals. Other radicals which can be produced under laboratory conditions play a role as intermediates in organic chemical reactions or, for example, as intermediates in commercial deposition of thin metallic films. The research conducted in this project will provide information on the structure and ground state electronic properties of an important group of radicals and thus provide better understanding for their possible use in chemical processes.

在化学系物理化学项目的这个项目中，卫斯理大学化学系的Stewart Novick教授将使用卫斯理大学建造的新仪器，通过脉冲喷射法布里-珀罗傅里叶变换微波光谱法对瞬态自由基的结构进行一系列研究。待研究的物种包括那些具有化学和天体化学意义的物种。一些含自由基的货车德瓦耳斯配合物也将被研究。自由基可以定义为气相中的反应性瞬态分子物种。更传统的定义是具有一个或多个未成对电子的分子或分子碎片。这些物种是高度反应性的，难以捉摸的，难以生产，通常难以研究。然而，这些自由基是非常重要的，无论是作为化学反应的中间体，还是作为一种物种本身。事实上，射电天文学发现的许多星际分子都是自由基。在实验室条件下可以产生的其他自由基在有机化学反应中起中间体的作用，或者例如在薄金属膜的商业沉积中起中间体的作用。在这个项目中进行的研究将提供关于一组重要的自由基的结构和基态电子性质的信息，从而更好地了解它们在化学过程中的可能用途。