Photoion and Photoelectron Spectroscopy of Metal Clusters and Complexes

在化学学部化学结构、动力学和机理项目的支持下，美国肯塔基大学杨东升教授及其课程组将研究活性气态金属团簇和金属分子配合物的键合和结构。重点将放在与催化有关的早期过渡金属簇氧化物，以及与有机金属合成有关的镧系-苯配合物，这些配合物也对化学键的量子理论提出了挑战。这些短寿命的化学物质将在激光汽化分子束中制备，用光解离质谱法鉴定，并使用各种技术进行研究，包括零电子动能光电子，质量分析阈值电离和红外-紫外光解离光谱。结合光谱数据和理论预测将允许表征电子状态和分子结构。该研究项目将为金属簇的尺寸依赖性结构和电子性质以及金属配体结合和金属配合物的能量学提供新的知识。研究结果将对有机金属化学、表面科学、材料合成和化学催化领域的从业者产生兴趣。该项目为学生和博士后提供技术上具有挑战性的研究培训机会，为他们在工业界或学术界的职业生涯做好有效准备。

In this project supported by the Chemical Structure, Dynamics and Mechanisms Program of the Division of Chemistry, Professor Dong-Sheng Yang of the University of Kentucky and his research group will investigate the bonding and structures of reactive gaseous metal clusters and metal-molecule complexes. Emphasis will be placed on early transition metal cluster oxides, which are relevant to catalysis, and lanthanide-benzene complexes, which are relevant to organometallic synthesis and also pose a challenge to quantum theories of chemical bonding. These short-lived chemical species will be prepared in laser-vaporization molecular beams, identified with photoionization mass spectrometry, and studied using a variety of techniques including zero electron kinetic energy photoelectron, mass analyzed threshold ionization, and infrared-ultraviolet photoionization spectroscopy. Combining the spectroscopic data and theoretical predictions will allow for the characterization of electronic states and molecular structures. This research project will lead to new knowledge about the size-dependent structures and electronic properties of the metal clusters and metal-ligand binding and energetics of the metal complexes. The results will be of interest to practitioners in organometallic chemistry, surface sciences, materials synthesis, and chemical catalysis. This project provides technologically challenging research training opportunities for students and postdoctoral associates to prepare them effectively for careers in industry or academia.