Talk:Endohedral fullerenes
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Hello,
I took a quick look at the article about "endohedral fullerenes". Even though I am not an expert in the whole contents of the article, I did detect a couple of errors in the part that concerns my participation in this area. I was a graduate student in 1993 working for Prof. Martin Saunders, and I was the one who carried out the experiments that led to the incorporation of He and Ne into C60, in low concentrations, and later to the incorporation of He, Ne, Ar, Kr, and Xe in higher concentrations.
The article is incorrect in stating that the experiments carried out at 2500 bars, led to the incorporation of He (and in particular 3He) in one out of 650,000 molecules. In fact, the experiments that led to this incorporation level were carried out at a much lower pressure (about 10 bars). The experiments carried out at pressures closer to 3000 bars led to incorporations of up to 0.1 % (for He, Ne, Ar, and Kr; incorporation of Xe was much less efficient), and even higher incorporation levels can be achieved if the process is repeated on previously labeled material.
I don't quite understand how wikipedia works. I would expect that the person that wrote the article made the appropriate corrections. Otherwise, I will do it.
The work carried out at low pressure that led to the incorporation of He or Ne in 1 out of 650,000 molecules of C60 is described in:
Stable compounds of helium and neon. He@C60 and Ne@C60. M. Saunders, H. A. Jiménez-Vázquez, R. J. Cross y R. J. Poreda, Science 1993, 259, 1428–1430.
The high-pressure work was reported in:
Incorporation of helium, neon, argon, krypton and xenon into fullerenes using high pressure. M. Saunders, H. A. Jiménez-Vázquez, R. J. Cross, S. Mroczkowski, M. L. Gross, D. E. Giblin y R. J. Poreda, J. Am. Chem. Soc. 1994, 116, 2193–2194.
201.137.151.193 15:16, 8 July 2006 (UTC) Hugo A. Jiménez-Vázquez Profesor Departamento de Química Orgánica ENCB-IPN México hjimenez@woodward.encb.ipn.mx
- Hi and welcome to Wiki. Thanks for pointing out the errors in this article. I have made some changes in the article. I was unable to retrieve the article from Science, if you can provide me with a DOI that would help a lot. The original article was translated from the German wiki and therefor the original editor is not around really. The nice thing about Wiki on the other hand is that everybody can edit and that nobody owns an article. So feel free to make edits!. Perhaps you can help us out with an explanation of a magnetic trap....(I have been looking hard but was unable to find anything meaningful)
Many thanks V8rik 19:39, 8 July 2006 (UTC)
Hi,
I am sorry for not getting back to you sooner. I do not have a DOI for the Science paper, although i could send you a scanned copy of a reprint. It's only four pages long. Let me know...
When reading the reprint i noticed i made a mistake. The first low-pressure experiments were carried out in a sealed quartz ampule containing a few mg of C60 and about 1 atm of helium-3. The ampule was heated to 600 C, and at that temperature the helium-3 pressure inside the ampule was expected to reach about 3 atm. I have made the correction to the wikipedia article.
Concerning the magnetic trap, i have an idea of what it is (it's becoming popular in sci-fi novels), but i am not qualified to give an explanation for this. Last year there was an article in Scientific American that talked about Fermi gases and magnetooptical traps, perhaps you can use that.
Regards,
148.204.162.186 19:35, 13 July 2006 (UTC) Hugo A. Jiménez-Vázquez. Professor. Departamento de Química Orgánica. ENCB-IPN. México. hjimenez@woodward.encb.ipn.mx
- Thanks for your response, I will look up the articles next time I am in the library, for now most important is that the article is now fact-checked V8rik 21:44, 13 July 2006 (UTC)
Hey there, I just thought it would be nice to have "Metallic Nitride Fullerenes" and/or MNFs re-direct here; as far as I know that phrase should cover fullerenes that contain a nitrogen and 3 metals, such as the Sc3N@C80 mentioned in this article.
