Optical Absorption Spectroscopy of Metal Containing Molecules

含金属分子的光学吸收光谱

• 批准号: 0317130
• 负责人: Timothy Steimle
• 金额: $ 34.03万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0317130&HistoricalAwards=false
• 关键词: Optical; Absorption; Spectroscopy; Metal; Containing

This research is funded by the Experimental Physical Chemistry Program of the Chemistry Division. In three related tasks Steimle will: a) detect and characterize transition metal dioxides using transient frequency modulation (TFM) spectroscopy; b) detect and characterize by laser induced fluorescence spectroscopy Fe-containing molecules thought to be catalytic intermediates in flame suppression; and c) perform Zeeman and Stark spectroscopy to characterize 3d transition metal monoxides and mononitrides. The metal-containing radicals will be generated using either an existing laser ablation/supersonic expansion source or a dc-discharge/supersonic expansion source. The molecular species will be characterized through the analysis of their electronic spectra as well as of the optical Stark and Zeeman spectral splittings. Understanding the oxidation reaction of transition metals is both of fundamental importance in chemistry and is crucial to many related areas such as surface science and metallurgy. Certain Fe-containing compounds have been found to be substantially more effective at flame inhibition and are environmentally friendlier than halogen-containing compounds, whose use is being phased out. The proposed research will make important contributions to the understanding of these topics. Although the experiments and the analyses of the results are complex and sophisticated, they lend themselves to the involvement by graduate and undergraduate students who work under the supervision of the principal investigator

这项研究是由化学部实验物理化学计划资助的。 在三个相关任务中，Steimle将：a）使用瞬态频率调制（TFM）光谱检测和表征过渡金属二氧化物； b）检测和特征是激光诱导的荧光光谱含有富含催化的分子在火焰抑制中是催化中间体； c）执行Zeeman和Stark光谱，以表征3D过渡金属一氧化物和单硝酸盐。 将使用现有的激光消融/超音速膨胀源或直流电荷/超音速膨胀源来生成含金属的自由基。 分子物种将通过分析其电子光谱以及光学鲜明和Zeeman光谱分裂来表征。了解过渡金属的氧化反应在化学中至关重要，并且对于许多相关领域（例如表面科学和冶金）至关重要。 已经发现某些含有FE的化合物在火焰抑制时比含卤素的化合物更有效，并且在环境上更友好。 拟议的研究将为对这些主题的理解做出重要贡献。 尽管实验和结果的分析是复杂而复杂的，但它们却将在主要研究人员监督下工作的研究生和本科生的参与。