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Title: Small-angle X-ray scattering study of the structure of powder fullerene C{sub 60} and fullerene soot

Abstract

Powder samples of fullerene C{sub 60} and fullerene soot have been studied by the small-angle X-ray scattering method. The radii of gyration of scattering elements have been determined by constructing small-angle diffraction patterns in Guinier coordinates. The data obtained agree well with the results of wide-angle X-ray scattering study, the available data on the structure of the powder fullerene C{sub 60} prepared by the Huffman-Kraetschmer technique, and the structure of the C{sub 60} molecules. Conglomerates of two C{sub 60} molecules, along with crystallites {approx}20 nm in size that are distributed in an amorphous matrix, are present in fullerene powders. Fullerene soot contains C{sub 60} crystallites 20-25 nm in size and graphite crystallites {approx}2-3 nm in size that are distributed in an amorphous matrix.

Authors:
 [1]; ;  [2];  [3]
  1. Russian Academy of Sciences, Institute of Problems of Mechanical Engineering (Russian Federation), E-mail: ginzburg@tribol.ipme.ru
  2. Tajik State University (Tajikistan)
  3. Russian Academy of Sciences, Institute of Problems of Mechanical Engineering (Russian Federation)
Publication Date:
OSTI Identifier:
21090958
Resource Type:
Journal Article
Resource Relation:
Journal Name: Crystallography Reports; Journal Volume: 52; Journal Issue: 2; Other Information: DOI: 10.1134/S1063774507020034; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CONGLOMERATES; FULLERENES; GRAPHITE; POWDERS; SMALL ANGLE SCATTERING; SOOT; X-RAY DIFFRACTION

Citation Formats

Ginzburg, B. M., Tuichiev, Sh., Tabarov, S. Kh., and Shepelevskii, A. A. Small-angle X-ray scattering study of the structure of powder fullerene C{sub 60} and fullerene soot. United States: N. p., 2007. Web. doi:10.1134/S1063774507020034.
Ginzburg, B. M., Tuichiev, Sh., Tabarov, S. Kh., & Shepelevskii, A. A. Small-angle X-ray scattering study of the structure of powder fullerene C{sub 60} and fullerene soot. United States. doi:10.1134/S1063774507020034.
Ginzburg, B. M., Tuichiev, Sh., Tabarov, S. Kh., and Shepelevskii, A. A. Thu . "Small-angle X-ray scattering study of the structure of powder fullerene C{sub 60} and fullerene soot". United States. doi:10.1134/S1063774507020034.
@article{osti_21090958,
title = {Small-angle X-ray scattering study of the structure of powder fullerene C{sub 60} and fullerene soot},
author = {Ginzburg, B. M. and Tuichiev, Sh. and Tabarov, S. Kh. and Shepelevskii, A. A.},
abstractNote = {Powder samples of fullerene C{sub 60} and fullerene soot have been studied by the small-angle X-ray scattering method. The radii of gyration of scattering elements have been determined by constructing small-angle diffraction patterns in Guinier coordinates. The data obtained agree well with the results of wide-angle X-ray scattering study, the available data on the structure of the powder fullerene C{sub 60} prepared by the Huffman-Kraetschmer technique, and the structure of the C{sub 60} molecules. Conglomerates of two C{sub 60} molecules, along with crystallites {approx}20 nm in size that are distributed in an amorphous matrix, are present in fullerene powders. Fullerene soot contains C{sub 60} crystallites 20-25 nm in size and graphite crystallites {approx}2-3 nm in size that are distributed in an amorphous matrix.},
doi = {10.1134/S1063774507020034},
journal = {Crystallography Reports},
number = 2,
volume = 52,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}
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  • Intense (1.42 krad/min) {gamma}-radiolysis of C{sub 60} dissolved in cyclohexane (weak magenta-colored solution) to a total dose of 51 krad resulted in the formation of a new compound (muddy red in color) with a solubility of more than 30 times that of saturated C{sub 60} in toluene. Low-power, laser desorption Fourier transform mass spectrometry (LD-FTMS) of the product yielded two ions at m/z=1539 and 1556, which correspond to [C{sub 60}(cyclohexane){sub 10}-xH]{sup +} for x=23 and 6, respectively. Higher power laser desorption conditions as well as collision-induced dissociation experiments of selected ions show the sequential loss of cyclohexane (C{sub 6}H{sub 10})more » units. Small-angle X-ray scattering (SAXS) of the dissolved material supports the mass spectrometry results of cyclohexane additions to the sphere. Taken together, the mass spectrometry and SAXS data indicate that the identity of the {gamma}-radiolysis products of C{sub 60} in cyclohexane most likely are cyclohexyl adducts of C{sub 60}, primarily C{sub 60}(cyclohexane){sub 10}. The SAXS data further indicate that some of the C{sub 60}(C{sub 6}H{sub 12}){sub x} entities aggregate into dimers in solution. A model is proposed in which cyclohexyl and hydrogen atom radiolysis products attach to C{sub 60} across double bonds. These double bonds are possibly those associated with the two top and bottom 5-fold symmetry positions around two opposing pentagons. 25 refs., 7 figs., 2 tabs.« less
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