Optical Stark and Zeeman Studies of Gas-Phase Metal Containing Molecules

实验物理化学计划支持Timothy Steimle， 亚利桑那州立大学在他的继续调查， 含金属小瞬态的几何和分子性质 分子。 永久的电和磁偶极矩将是 测定 磁超精细与核电四极 将分析相互作用，并与偶极矩相结合， 构建基于分子轨道的化学趋势描述 前将芯片 提出了三个实验项目：（一）检测 和表征的小的多原子过渡金属含 怀疑是简单模型有机金属化合物的产物的化合物 反应;（ii）第一次塞曼研究过渡金属二聚体;和 (iii)气相氮化镓的检测和表征。 超音速分子束样品将使用激光产生 烧蚀/反应方案和高分辨率激光诱导荧光 在静电场和磁场的存在下， 记录。 采用共振增强的飞行时间质谱法 多光子电离技术将被开发用于镓 氮化物射束诊断 过渡金属体系与催化有关， 表面化学，配位场理论，并最终 了解化学品的电子和几何要求 反应性 对氮化镓的特别研究可能最终证明 对半导体工业有用。

The Experimental Physical Chemistry Program supports Timothy Steimle of Arizona State University in his continuing investigations into the geometrical and molecular properties of small metal-containing transient molecules. The permanent electric and magnetic dipole moments will be determined. The magnetic hyperfine and nuclear electric quadrupole interactions will be analyzed and combined with the dipole moments to construct a molecular orbital-based description of trends in chemical bonding. Three experimental projects are proposed: (i) the detection and characterization of small polyatomic transition metal-containing compounds suspected to be products of simple model organometallic reactions; (ii) the first Zeeman study of transition metal dimers; and (iii) the detection and characterization of gas-phase gallium nitride. Supersonic molecular beam samples will be generated using a laser ablation/reaction scheme and high resolution laser-induced fluorescence spectra in the presence of static electric and magnetic fields will be recorded. Time-of-flight mass spectrometry employing resonance enhanced multi-photon ionization techniques will be developed for the gallium nitride beam diagnostics. The transition metal systems are important having relevance to catalysis, surface chemistry, ligand field theory and ultimately to the understanding of electronic and geometrical requirements for chemical reactivity. The particular study of gallium nitride may eventually prove useful to the semiconductor industry.