Spectroscopy of Diatomic Transition Metals

双原子过渡金属的光谱学

• 批准号: 9215193
• 负责人: Michael Morse
• 金额: $ 29.91万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-01-15 至 1996-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9215193&HistoricalAwards=false
• 关键词: Spectroscopy; Diatomic; Transition; Metals

In this project in the Experimental Physical Chemistry Program of the Chemistry Division, Dr. M. Morse of the University of Utah will investigate the chemical bonding and electronic structure of diatomic transition metal molecules using electronic spectroscopy. The methods include resonant two-photon ionization, high resolution laser-induced fluorescence, and dispersed fluorescence spectroscopy. In all cases the samples are prepared by pulsed laser vaporization of a suitable metal target, followed by supersonic expansion with helium as the carrier gas. The severe cooling that attends this expansion brings about significant reductions in the complexity of the spectra without which their analysis would be prohibitively difficult if not impossible. The research will focus on the diatomic molecules of iron, cobalt, titanium, niobium, tantalum, and platinum, as well as on their mixed diatomic variants. %%% Prof. Morse is recognized as an expert on gas phase transition metal dimer (and trimer) molecules. The work is in an area of great relevance to disciplines ranging from computational quantum chemistry to the inorganic chemistry of transition metal alloys. The results of this research will be ground and excited state symmetries, bond strengths, bond lengths, and vibrational frequencies for the transition metal molecules studied. These results in turn provide benchmark data for the development and testing of reliable quantum chemical models for transition metal molecules.

在这个实验物理化学项目中， 化学部的M博士莫尔斯 犹他州将调查化学键和电子 双原子过渡金属分子的结构 电子光谱学 这些方法包括共振 双光子电离，高分辨率激光诱导 荧光和分散荧光光谱。 在所有 在一些情况下，样品是通过脉冲激光蒸发制备的， 一个合适的金属靶，然后进行超音速膨胀， 氦气作为载气。 随之而来的严寒 这种扩张带来了显着减少， 光谱的复杂性，如果没有这些光谱， 即使不是不可能，也是极其困难的。 这项研究将 关注铁、钴、钛的双原子分子 铌、钽和铂，以及它们的混合物 双原子变体。 %%% 莫尔斯教授是公认的气相转变专家 金属二聚体（和三聚体）分子。 这项工作是在一个领域， 与从计算科学到计算机科学 量子化学向无机化学的过渡 金属合金 这项研究的结果将被地面和 激发态对称性，键强度，键长，和 过渡金属分子的振动频率 研究了 这些结果反过来又提供了基准数据， 开发和测试可靠的量子化学模型， 过渡金属分子。