Spectroscopic Studies of Weakly Bound Metal-Molecule Complexes

美国肯塔基大学杨东生博士的弱结合金属分子络合物的光谱研究获得了化学学部物理化学项目的资助。脉冲场电离-零电子动能（ZEKE）光谱将用于提供金属（Al, Ga, in, Sc， Y, La）配体（氨，胺，膦，砷）1-1配合物的电子结构。这些配合物将用脉冲激光汽化法制备，并用光电离质谱法进行鉴定。将使用ZEKE光谱测量的电离能和振动频率，结合从头计算，来阐明这些配合物的键合和结构。所获得的光谱和理解将有助于半导体应用的检测和工艺开发以及这些配合物的反应机制的研究。在半导体工业中，重要的是要有灵敏的光谱方法来检测重要金属如铝、镓和铟的氨、胺、磷化氢和砷配合物。杨博士的工作将阐明这些复合物的电子结构。这些结果将为工业过程中这些物种的研究提供急需的数据，并将增加我们对金属如何在有机金属配合物、生物无机配合物和金属表面与这些有用分子相互作用的理解。

Dr. Dong-Sheng Yang of the University of Kentucky is funded for his research on spectroscopic studies of weakly bound metal-molecule complexes by the Physical Chemistry Program of the Chemistry Division. Pulsed field ionization-zero electron kinetic energy (ZEKE) spectroscopy will be used to provide the electronic structure of metal (Al, Ga, in, Sc, Y, La) ligand (ammonia, amines, phosphines, arsines) 1-1 complexes. These complexes will be prepared by pulsed laser vaporization and identified with photoionization mass spectroscopy. The ionization energies and vibrational frequencies measured by ZEKE spectroscopy will be used, in combination with ab initio calculations, to elucidate the bonding and structure of these complexes. The spectra and understanding obtained will be useful for detection and process development for semiconductor applications and for studies of the reaction mechanisms of these complexes.It is important in the semiconductor industry to have sensitive spectroscopic methods for detecting ammonia, amine, phosphine, and arsine complexes of important metals such as aluminum, gallium, and indium. Dr. Yang's work will elucidate the electronic structure of these complexes. Such results will provide critically needed data for the study of these species in industrial processes and will increase our understanding of how metals interact with such useful molecules in organometallic complexes, bioinorganic complexes, and at metal surfaces.