"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Endohedral fullerenes of different elements

J. CVETIĆANIN1,* , J. DJUSTEBEK1, M. VELJKOVIĆ1, S. VELIČKOVIĆ1, V. DJORDJEVIĆ1, O. NEŠKOVIĆ1

Affiliation

  1. Vinča Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia

Abstract

n this work we have studied the Li/C60, Li/C70, 99mTc/C60, 99mTc/C70, Gd/C60, Gd/C70, Nd/C60, Nd/C70, Y/C60 and Y/C70 systems by surface ionization mass spectrometry and investigated a possibility of the formation of endohedral fullerenes. Using the ion implantation technique (introducing negatively charged fullerene into a low temperature lithium, technetium, gadolinium, neodymium or yttrium plasma column by a strong axial magnetic field), the endohedral fullerenes Li≅C60, Li≅C70, Li2≅C70, 99mTc≅C60, 99mTc≅C70, Gd≅C60, Nd≅C60, Y≅C60, Gd≅C70, Nd≅C70 and Y≅C70 have been produced and ionization energies were measured. Their existence was demonstrated through the high sensitivity, magnetic mass spectrometer (TIMS- thermal ionization mass spectrometer). These metallofullerenes were identified as stable molecules. The reaction of the obtained endohedral fullerenes with oxygen compounds (H2O, O2 and N2O) has also been investigated. The result showed that these metallofullerenes are very inert to all of these gas phase oxygen-rich molecules, leading support to the endohedral structure of the metallofullerenes. Observed ionization energies for Li≅C60, Li≅C70, Li2≅C70, 99mTc≅C60, 99mTc≅C70, Gd≅C60, Nd≅C60, Y≅C60, Gd≅C70, Nd≅C70 and Y≅C70 were 5.9eV, 5.1eV, 5.3 eV, 5.1 eV, 5.3eV, 6.2 eV, 6.5 eV, 6.6 eV, 6.4 eV, 6.5 eV and 6.7 eV, respectively..

Keywords

Enohedral fullerenes, Isotopic pattern, Mass spectrometry.

Submitted at: July 26, 2006
Accepted at: Sept. 13, 2006

Citation

J. CVETIĆANIN, J. DJUSTEBEK, M. VELJKOVIĆ, S. VELIČKOVIĆ, V. DJORDJEVIĆ, O. NEŠKOVIĆ, Endohedral fullerenes of different elements, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 5, pp. 1892-1894 (2006)