【摘要】 自行搭建了一台实验仪器研究金属簇合物.这台仪器由纳升电喷雾电离源、离子传输与聚焦系统和反射式飞行时间质谱仪组成.纳升电喷雾电离源能产生多价离子.仪器的质量分辨率高于8000.金属簇合物[Au₂₀（PPhpy₂）₁₀Cl₂]（SbF₆）₄（PPhpy₂是双（2-吡啶基）苯基膦）和[Au₆Ag₂（C）L₆]（BF₄）₄（L是2-（二苯膦基）-5-甲基吡啶）的分子离子峰分别被检测到,同时也分别得到一些碎片离子峰.同时分子离子峰的荷质比被确定.初步结果表明这台仪器是研究金属簇合物的强大工具.这些质谱结果在金属簇合物的结构表征中被证明是单晶X射线衍射方法的必要补充.更多还原

【Abstract】 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 determinated.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.更多还原