EVIDENCE FROM ION CHROMATOGRAPHY EXPERIMENTS THAT MET-CARS ARE HOLLOWCAGE CLUSTERS

Citation
Sh. Lee et al., EVIDENCE FROM ION CHROMATOGRAPHY EXPERIMENTS THAT MET-CARS ARE HOLLOWCAGE CLUSTERS, Science, 267(5200), 1995, pp. 999-1001
Citations number
30
Categorie Soggetti
Multidisciplinary Sciences
Journal title
ISSN journal
00368075
Volume
267
Issue
5200
Year of publication
1995
Pages
999 - 1001
Database
ISI
SICI code
0036-8075(1995)267:5200<999:EFICET>2.0.ZU;2-1
Abstract
Ion chromatography studies were performed to assess various models pro posed for the structure of M(8)C(12) species, the met-cars. A laser de sorption source was used to make a sequence of titanium-carbon cluster s centered around Ti8C12+. The Ti8C12+ was determined to be a hollow c age cluster, with the dodecahedron structure originally proposed givin g the best fit to experiment; cubic structures could be excluded. Coll isional breakup of Ti8C12+ yielded only Ti7C12+ under the experimental conditions described herein, and modeling indicated that the cage str ucture was retained. Both Ti8C11+ and Ti8C13+ were made by the cluster source, and again, dodecahedral-type cage structures were consistent with experiment. The extra carbon atom in Ti8C13+ was attached exohedr ally to a single titanium atom. No evidence for an endohedral species was found.