Spectroscopy of metal-containing molecules, ions

含金属分子、离子的光谱学

• 批准号: 46678-2006
• 负责人: Parnis, Mark
• 金额: $ 2.19万
• 依托单位: Trent University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=390702
• 关键词: Spectroscopy; metal; containing; molecules; ions

The research program is broadly focused on the properties and reactions of metallic species. The research proposed can be divided into three major areas: The first of these involves the study of molecules of interests by interpreting the way in which different wavelengths of light interact with them.  We will use (1) lasers to form metal atoms, and freeze these atoms with reactive molecules to isolate their reaction products, or (2) we will bombard mixtures of molecules of interest with electrons, and subsequently freeze the ion reaction and decomposition products in a solid inert gas.  We intend to study the reactions of alkenes with early transition metals, and the mechanism of the famous "keto-enol" transformation, in which ketones and aldehydes are converted to alcohols with a C=C double bond.   The second area is focused on the spectroscopy and reactivity of very small metal particles with sizes on the nanometer scale (nanoparticles) in low-temperature matrices.  We are currently developing protocols for matrix-isolation based analysis of nanoparticle reaction products, and will employ infrared light absorption as our structure characterization technique.   The third area is the trapping and characterization of the products of charged molecule and atom reactions with small molecules in a molecular beam apparatus, currently being assembled at Trent.  Ions will be formed by laser vaporization of metal targets, followed by ionization in an electric discharge, before entering a reaction zone.  The products will be characterized by a combination of matrix-isolation and mass spectrometry techniques.

该研究计划广泛关注金属物种的性质和反应。拟议的研究可分为三个主要领域：第一种是通过解释不同波长的光与感兴趣的分子相互作用的方式来研究它们。我们将使用（1）激光形成金属原子，并将这些原子与反应分子冷冻以分离它们的反应产物，或者（2）我们将用电子轰击感兴趣的分子的混合物，并随后在惰性气体中冷冻离子反应和分解产物。我们打算研究烯烃与前过渡金属的反应，以及著名的“酮-烯醇”转化的机理，其中酮和醛转化为具有C=C双键的醇。 第二个领域的重点是低温基质中纳米级尺寸的非常小的金属颗粒（纳米颗粒）的光谱和反应性。我们目前正在开发基于基质隔离的纳米颗粒反应产物分析方案，并将采用红外光吸收作为我们的结构表征技术。 第三个领域是在目前正在特伦特组装的分子束装置中捕获和鉴定带电分子和原子与小分子反应的产物，离子将通过激光蒸发金属靶形成，然后在放电中电离，然后进入反应区，将通过结合基质分离和质谱技术鉴定产物。