ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
Aluminum–sulfur cluster ions were obtained by direct laser ablation (248 nm, ≥10 MW/cm2) and analyzed with a tandem time-of-flight mass spectrometer. The regular peaks of cluster ions having composition of AlS+(Al2S3)n (n=1,2,3,...,31) were shown on the first time-of-flight mass spectrum (TOF-MS). The cluster ions of a certain mass number (m/e) could be selected and photolyzed by an ArF laser (193 nm, 1 MW/cm2). The product ions were analyzed by a second TOF-MS. It was found that the cluster ions lost (Al2S3)x (x=1, 3, or 4) and became smaller cluster ions of the same stable formula AlS+(Al2S3)n−x. Cagelike structures were proposed to be possible for these stable cluster ions. Semiempirical and ab initio quantum chemical calculations have also been performed for some of the clusters.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.467814
