Stable Compounds of Helium and Neon: He@C60 and Ne@C60

  title={Stable Compounds of Helium and Neon: He@C60 and Ne@C60},
  author={M. Saunders and Hugo A. Jim�nez-V�zquez and R. J. Cross and R. Poreda},
  pages={1428 - 1430}
It is demonstrated that fullerenes, prepared via the standard method (an arc between graphite electrodes in a partial pressure of helium), on heating to high temperatures release 4He and 3He. The amount corresponds to one 4He for every 880,000 fullerene molecules. The 3He/4He isotopic ratio is that of tank helium rather than that of atmospheric helium. These results convincingly show that the helium is inside and that there is no exchange with the atmosphere. The amount found corresponds with a… Expand
Sorption studies of helium and neon by crystals of C60 and C70
We present sorption measurements for3He and4He in the temperature range of 1.5 K to 4.1 K, and for20Ne in the temperature range of 22 K to 27 K by crystals of C60, C70 and crystals of the mixture ofExpand
Theoretical prediction of maximum capacity of C₈₀ and Si₈₀ fullerenes for noble gas storage.
  • Z. Mahdavifar
  • Chemistry, Medicine
  • Journal of molecular graphics & modelling
  • 2014
It is demonstrated that how many helium, neon and argon atoms can be trapped into fullerene cages until the pressure becomes large enough to break the C80 and Si80 frameworks. Expand
Noble Gas Atoms Inside Fullerenes
Heating fullerenes at 650°C under 3000 atmospheres of the noble gases helium, neon, argon, krypton, and xenon introduces these atoms into the fullerene cages in about one in 1000 molecules. AExpand
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Abstract The ion chemistry of helium currently embraces a large variety of species, mostly cationic, which range from simple small-size molecular fragments or complexes to large-size cluster ions andExpand
Fullerenes: an extraterrestrial carbon carrier phase for noble gases.
  • L. Becker, R. Poreda, T. Bunch
  • Chemistry, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
  • 2000
It is determined that both the Allende and Murchison fullerene cage structure and the KTB fullerenes contain trapped noble gases with ratios that can only be described as extraterrestrial in origin. Expand
Radical Impurity Mechanisms for Helium Incorporation into Buckminsterfullerene
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High stability of the He atom confined in a U@C60 fullerene
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The results suggest the conceivable existence of an, in principle, very large class of M(NBeHe)(n) (n>1) polyhelium complexes, whose stability may be substantially affected by the nature and the size of the central moiety M. Expand
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Abstract Quantum chemical calculations based on the PM3 molecular Hamiltonian are reported investigating the optimum geometry for the implantation of a fluorine atom in a C 60 molecule. Of theExpand


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THE conjecture that atoms can be trapped inside closed carbon cages such as the fullerenes was first made by Kroto et al1. Mass spectroscopic evidence obtained soon after2 suggested that lanthanumExpand
Fullerenes with metals inside
Fullerenes with a single lanthanum atom trapped on the inside of the carbon cage were produced by laser vaporization of a lanthanum oxide/graphite composite rod in a flow of argon gas at 1200 °C.Expand
Scandium Clusters in Fullerene Cages
Production of macroscopic quantities of clustercontaining fullerenes may make possible the fabrication of exotic new structures with regular arrays of metal-atom clusters isolated in fullerene molecules, resulting in a new type of host/guest nanostructured material. Expand
Endohedral fullerene-noble gas clusters formed with high-energy bimolecular reactions of Cxn+ (x=60, 70; n=1,2,3)
Results are reported for high-energy beam experiments which establish the formation of endohedral carbon cluster-noble gas compounds by bimolecular reactions of C (x = 60, 70; n = 1, 2, 3) with HeExpand
Lanthanum complexes of spheroidal carbon shells
Laser vaporization of graphite in a high-pressure supersonic nozzle produced a remarkable stable C60 molecule in high yield with striking and exciting new properties. Specifically it was found thatExpand
Ab initio MO calculation on the energy barrier for the penetration of a benzene ring by a helium atom. Model studies for the formation of endohedral He@C60+ complexes by high-energy bimolecular reactions
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We have performed a series of experiments in which the conditions necessary for synthesis and detection of carbon clusters have been systematically investigated. The effects of ionizing laserExpand
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The rare gas isotopic compositions of residual harzburgite xenoliths from Savai'i (SAV locality) and an unnamed seamount south of the Samoan chain (PPT locality) provide important constraints on theExpand
On the application of the minimal principle to solve unknown structures.
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