Photoinduced dissociation of anionic and electron detachment of dianionic gold clusters by use of a laser pointer |
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| Affiliation: | 1. Institut für Physik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany;2. Institut für Physik, Ernst-Moritz-Arndt-Universität, Domstrasse 10a, D-7487 Greifswald, Germany;1. Instituto Pluridisciplinar, Universidad Complutense de Madrid, Madrid, Spain;2. Facultad de Psicología, Universidad Autónoma de Madrid, Madrid, Spain;3. Facultad de Psicología, Universidad Complutense de Madrid, Madrid, Spain;1. Creative Arts and Music Therapy Research Unit, Faculty of Fine Arts and Music, University of Melbourne, 234 St. Kilda Rd, Southbank, 3006, VIC, Australia;2. Dance Movement Psychotherapist, Private Practice, President, Dance Movement Therapy Association of Australasia, PO Box 5029, Garran, ACT, 2605, Australia;3. Australian Childhood Foundation, PO Box 3335, Richmond, VIC, 3121, Australia;1. State Key Laboratory of Advanced Special Steels & Shanghai Key Laboratory of Advanced Ferrometallurgy & School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China;2. Department of Materials Science, Fudan University, Shanghai, 200433, China;1. Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan;2. Department of Chemistry, University of Science & Technology, Bannu 28100, KPK, Pakistan;3. Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec H3A2K6, Canada |
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| Abstract: | Size-selected anionic and dianionic gold clusters have been stored in a Penning trap and irradiated with the green light of a laser pointer. As examples of special interest, the systems Au7− and Au292− have been chosen. In particular, Au7−, a small gold cluster with closed electron shell, is observed to decay into Au6− and Au5− with a decay pathway branching ratio similar to that of Au9+. The dianionic cluster Au292− shows electron detachment upon photoexcitation. This observation is in agreement with independent experiments [Stoermer et al., Int. J. Mass Spectrom. 201 (2001) 63], where Au292− is found to be the smallest dianion produced by neutral monomer evaporation of hot dianionic gold clusters. |
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