Large odd-numbered carbon clusters from fullerene-ozone reactions.
نویسندگان
چکیده
The odd-numbered carbon clusters C(119), C(129), and C(139) have been observed in the mass spectra of toluene extracts of fullerene soots and of the products of ozone-fullerene reactions. Specifically, ozone-C(60) reactions yield C(119), ozone-C(70) reactions yield C(139), and ozone-(C(60)/C(70)) reactions produce C(119), C(129), and C(139). These unexpected species correspond to dimers of C(60), C(60)/C(70), and C(70), respectively, less one carbon atom, and are stable gas-phase ions with behavior similar to that of fullerenes. The results suggest a new route to functionalization and derivatization of fullerenes through controlled ozone-catalyzed cage-opening reactions.
منابع مشابه
The interactions of oxygen with small gold clusters on nitrogen-doped graphene.
By means of density functional theory, the adsorption properties of O₂ molecule on both isolated and N-graphene supported gold clusters have been studied. The N-graphene is modeled by a C₆₅NH₂₂ cluster of finite size. The results indicate that the catalytic activity and the O₂ adsorption energies of odd-numbered Au clusters are larger than those of adjacent even-numbered ones. The O₂ molecule i...
متن کاملAdatoms and nanoengineering of carbon
We present a new and general mechanism for inter-conversion of carbon structures via a catalytic exchange process, which operates under conditions of Frenkel pair generation. The mechanism typically lowers reaction barriers by a factor of four compared to equivilent uncatalysed reactions. We examine the relevance of this mechanism for fullerene growth, carbon onions and nanotubes, and dislocati...
متن کاملSpontaneous Adsorption, and Selective Sensing of CO, and CO2 Greenhouse Gaseous Species by the more Stable Forms of N4B4 Clusters
Carbon oxide gaseous species are potentially considered as pollutants of the atmosphere of earth; especially, carbon monoxide and carbon dioxide which are of the well-known carbon oxids, play an effective role in the greenhouse gas emissions. Moreover, these species could initiate or handle some chain reactions in the troposphere that lead to emergence of some secondly air pollutants which may ...
متن کاملStructures and Formation of Small Lacn+ Metallofullerenes
Injected ion drift tube techniques have been used to probe Lac,+ clusters in the size range around LaC36+ where the fullerene cage becomes too small to accommodate a La atom. Mobility measurements show that as the fullerene cage shrinks, the La atom moves out of the cage into the carbon network, stabilizing clusters with an odd number of carbon atoms. Annealing studies demonstrate that in this ...
متن کاملStructures and Isomerization of Lac,+ Clusters
Injected ion drift tube techniques have been used to examine the structures and to study the isomerization of Lac,+ (n = 2-90) clusters. Three families of metal-containing carbon rings ("ring Ia", "ring Ib", and "ring II"), metal-containing graphite sheets, and metallofullerenes have been resolved. Several plausible geometries with similar mobilities can be suggested for all of the ring isomers...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Science
دوره 260 5114 شماره
صفحات -
تاریخ انتشار 1993