Spectroscopy of Diatomic Transition Metals

犹他州大学的迈克尔莫尔斯是由实验 物理化学计划继续他的化学研究 过渡金属双原子分子的成键和电子结构 使用电子光谱学。 所采用的方法包括 共振双光子电离光谱，激光诱导和色散 荧光光谱和共振双光子脉冲场 电离零电子动能光电子能谱。 在 在所有情况下，样品将通过脉冲激光烧蚀产生， 适当的金属靶，然后进行超音速膨胀。 的 扩展降低了与开放式系统相关联的频谱的复杂性。 d亚壳层系统，便于解释光谱。 研究 将集中在过渡金属硅化物，同质和异质 过渡金属氧化物和双原子铂。 在后一 的情况下，详细的比较从头量子化学将提供 这是对相对论化学键理论的一个重要检验。 这些研究将大大提高我们对化学物质的认识 过渡金属之间的键合，并将提供重要的测试， 过渡金属理论方法的发展 系统. 例如，人们对过渡金属 硅键，尽管过渡金属硅化物广泛用于 微电子器件、太阳能电池、红外探测器和 保护涂层

Michael Morse of the University of Utah is supported by the Experimental Physical Chemistry Program to continue his investigations on the chemical bonding and electronic structure of diatomic transition metal molecules using electronic spectroscopy. The methods to be employed include resonant two-photon ionization spectroscopy, laser-induced and dispersed fluorescence spectroscopies, and resonant two-photon pulsed field ionization zero electron kinetic energy photoelectron spectroscopy. In all cases, the sample will be generated by pulsed laser ablation of the appropriate metal target, followed by supersonic expansion. The expansion reduces the complexity of the spectra associated with the open d subshell systems, facilitating interpretation of the spectra. Research will focus on the transition metal silicides, homo- and heteronuclear transition metal diatomics, and on diatomic platinum. In the latter case, a detailed comparison to ab initio quantum chemistry will provide an important test for relativistic theories of chemical bonding. These studies will greatly enhance our understanding of the chemical bonding between transition metals and will provide important tests for the development of theoretical methods applicable to transition metal systems. For example, very little is known about the transition metal silicon bond, despite the wide use of transition metal silicides in microelectronic devices, solar cells, infrared detectors and as protective coatings.