反射式飞行时间质谱仪结合纳升电喷雾电离源研究金属簇合物

An experiment facility has been set up for the study of metal cluster compounds in our laboratory, which consists of a nano-electrospray ionization source, an ion transmission and focus system, and a reflectron time-of-flight mass spectrometer. Taking advantage of the nano-electrospray ionization source, polyvalent ions are usually produced in the “ionization” process and the obtained mass resolution of the equipment is over 8000. The molecular ion peaks of metal cluster compounds [Au₂₀(PPhpy₂)₁₀Cl₂](SbF₆)₄, where PPhpy₂=bis(2-pyridyl)phenylphosphine, and [Au₆Ag₂(C)L₆](BF₄)₄, where L=2-(diphenylphosphino)-5-methylpyridine, are distinguished in the respective mass spectrum, accompanied by some fragment ion peaks. In addition, the mass-to-charge ratios of the parent ions are determi-nated. Preliminary results suggest that the device is a powerful tool for the study of metal cluster compounds. It turns out that the information obtained by the instrumentation serves as an essential supplement to single crystal X-ray diffraction for structure characterization of metal cluster compounds.     

教学质谱仪的设计、构造及其在实验教学中的应用

介绍了教学质谱仪的设计理念及仪器基本构造。教学质谱仪按模块化设计,由进样系统、离子源、质量分析器、检测器、真空系统、控制系统,以及计算机系统等部分组成,适合学生自主搭建与调试。以“教学质谱仪的搭建、调试与应用”实验为例,介绍教学质谱仪在实验教学中的应用。通过自主搭建和调试质谱仪器,不仅可以深化学生对质谱仪器原理和构造、质谱分析方法的认识,提升实践能力和知识综合应用能力,更重要的是打破了学生对科学仪器的神秘感,激发了学生的学习兴趣与好奇心,对培养学生的实践能力和创新意识具有重要影响。