Isomer-separated photodissociation of large sized silicon and carbon cluster ions: Drift tube experiment combined with a tandem reflectron mass spectrometer for Si24+– Si27+ and C32+–C38+*
Department of Chemistry, Graduate School of Science, Tohoku University, 6–3 Aoba, Aramaki, Aoba-ku, 980–8578 Sendai, Japan
Received: 28 August 2012
Received in final form: 25 October 2012
Published online: 5 February 2013
Isomer-resolved multiphoton dissociations (PDs) with 4.66-eV laser photons were applied to carbon and silicon cluster cations, Cn+ (n = 32, 34, 36, and 38) and Sim+ (m = 24–27), in order to investigate correlations between the isomer structures and dissociation reactions. Cyclic and fullerene structures of Cn+ and prolate and spherical isomers of Sim+, which are the coexisting isomers in these size ranges, were separated by ion mobility spectrometry, followed by photolysis using a tandem reflectron mass spectrometer. Photofragment ion distributions were revealed to depend on the parent isomer structures. Dissociation mechanisms were discussed from the fragment ion distributions.
Key words: Topical issue: ISSPIC 16 - 16th International Symposium on Small Particles and Inorganic Clusters. Guest editors: Kristiaan Temst, Margriet J. Van Bael, Ewald Janssens, H.-G. Boyen and Françoise Remacle
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2013