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Formation of small lanthanum-carbide ions from laser induced fragmentation of La@C-82
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- Lassesson, Andreas, 1976 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Gromov, Andrei, 1959 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Mehlig, Kirsten, 1964 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- (creator_code:org_t)
- AIP Publishing, 2003
- 2003
- English.
- In: Journal of Chemical Physics. - : AIP Publishing. - 1089-7690 .- 0021-9606. ; 119:11, s. 5591-5600
- Journal article (peer-reviewed)
Abstract
Subject headings
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- The fragmentation behavior of the endohedral metallofullerene La@C-82 was studied using gas phase time-of-flight mass spectrometry. The results were compared with the fragmentation of C-60. When the metallofullerene was excited by a 337 nm ns laser, small lanthanum-carbide fragments LaCn+, n=0-6, were detected. A simple statistical maximum entropy model was used to simulate the excitation energy dependence of the loss of the LaCn+ molecules as well as C-2 evaporation to form smaller metallofullerenes. By comparing experimental ion intensities with the model, the appearance energies of LaCn+, n=0-6, were found to lie above 65 eV. The lanthanum-carbide fragments ejected from La@C-82 decrease in size with increasing internal energy. The ejection of La+ and LaC2+ is preferred at the expense of larger fragments such as LaC4+ and metallofullerenes at the higher excitation. (C) 2003 American Institute of Physics.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- CARBON
- ENERGIES
- CLUSTERS
- IONIZATION
- MASS-SPECTROMETRY
- ENDOHEDRAL FULLERENES
- DISSOCIATION
- METALLOFULLERENES
- ELECTRONIC-STRUCTURE
- C-60
- ENDOHEDRAL FULLERENES; ELECTRONIC-STRUCTURE; MASS-SPECTROMETRY; C-60; CLUSTERS; CARBON; METALLOFULLERENES; IONIZATION; DISSOCIATION; ENERGIES
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