Abstract
AbstractTransition 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, MnSm are different for various transition metals: Cu, n = 2m + I 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.
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