- 作者: 史揚 ; 于忠德 ; 張南等
- 作者服務機構: 北京巿中國科學研究院化學研究所
- 中文摘要: Transition metal-sulfur binary cluster ions were produced by direct laser ablation and analyzed with the first stage time-of-flight mass spectrometer (TOF-MS). It was found that the distribution of the strong peaks of the stable cluster ions in the TOF-MS were not appreciably affected by the composition of the sample. The composition of the most stable metal-sulfur cluster ions, M/sub n/ S/sub m/, are different for various transition metals: Cu, n=2m+1 and n=2m; Zn, m=n; Mn, m=n; Fe, m=n, m=n-1 and m=n-2; Co, m=n-1, m=n-2, m=n-3, m=n-4 and m=n-5; Cr, m=n and m=n+1; Ta, m=n+1 and m=n+2. Cluster ions can be selected by a mass gate, and photolyzed by an excimer laser. The photodissociation product ions were analyzed with the second stage TOF- MS. These product ions were mainly the more stable cluster ions as those given in the first stage TOF-MS.
- 英文摘要: --
- 中文關鍵字: Time-Of-Flight Mass Spectrometer; Photodissociation; Metal-Sulfur Cluster Ion; Formation
- 英文關鍵字: 時間飛行質譜儀;光解離;金屬-硫簇離子;生成