Optical absorption spectroscopy of metal containing molecules

亚利桑那州立大学的Timothy Steimle得到了实验物理化学项目的资助，他正在使用光学吸收光谱研究含有早期过渡金属的自由基和镁有机金属自由基。这些自由基将在激光烧蚀金属源的超音速膨胀中产生，并使用高分辨率激光诱导荧光和所提出的瞬时调频光谱仪来检测物种。这些技术将被用来获得这些物种的超精细结构和永久电偶极矩。对于已知的TICH和VCH自由基，将得到偶极矩。将研究氢氧化镁、氢氧化钛和氢氧化铜，并寻找含有早期过渡金属的氢氧化物、亚胺和硫醇自由基。这些数据是对涉及电子关联的理论的严格检验。这种对含过渡金属化合物的详细的光谱研究将提供高分辨率的光谱，从中将获得关于化合物永久电偶极子的基本信息。这将被用来测试处于开发阶段的这些困难物种的最新理论。这些数据也广泛适用于有机金属、分析和高温化学以及恒星大气和星际介质。

Timothy Steimle of Arizona State University is supported by a grant from the Experimental Physical Chemistry Program with which he is using optical absorption spectroscopy to study early transition metal containing radicals and magnesium organometallic radicals. The radicals will be generated in the supersonic expansion of a laser ablated metal source and the species detected using high resolution LIF and a proposed transient frequency modulation spectrometer. These techniques will be used to obtain hyperfine structure of these species and permanent electric dipole moments. Dipole moments will be obtained for the TiCH and VCH known radicals. MgOH, MgCH3, MgCCH, TiCH and CuOH will be studied and searches will be made for hydroxide, imide and thiol radicals containing early transition metals. These data are a stringent test of theory involving electron correlation.This detailed spectroscopy study of transition metal containing compounds will provide high resolution spectra from which fundamental information on permanent electric dipoles of the compounds will be obtained. This will be used to test state of the art theories which are in the development phase for these difficult species. The data are also widely applicable to organometallic, analytical and high temperature chemistry and to stellar atmospheres and the interstellar medium.