Results 181 to 190 of about 8,476 (220)

Superconductivity in single crystals of the fullerene C70

Nature, 2001
The observation of superconductivity in doped C60 has attracted much attention, as these materials represent an entirely new class of superconductors. A maximum transition temperature (Tc) of 40 K has been reported for electron-doped C60 crystals, while a Tc of 52 K has been seen in hole-doped crystals; only the copper oxide superconductors have higher
J H, Schön, C, Kloc, T, Siegrist, M, Steigerwald, C, Svensson, B, Batlogg   +5 more
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Preparation and Isolation of Three Isomeric C70 Isoxazolines: Strong Deshielding in the Polar Region of C70

Journal of the American Chemical Society, 1994
The C[sub 70] fullerene reacts with acetonitrile oxide and with 4-methoxybenzonitrile oxide to form a mixture of three isomeric monoadducts in addition to small amounts of di- and triadducts. The three isomeric monoadducts were separated and were found to result from 1,3-dipolar addition to 6-6 ring fusions of C[sub 70] at the 1,9 position and at the 7,
Mark S. Meier, Magdalena Poplawska, Amy L. Compton, Jonathan P. Shaw, John P. Selegue, Thomas F. Guarr   +5 more
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ChemInform Abstract: Biscyclopropanation of C70.

ChemInform, 1995
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
C. BINGEL, H. SCHIFFER
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Fluorescence of fullerenes (C60 and C70)

Journal of the American Chemical Society, 1993
The fluorescence of C[sub 60] and C[sub 70] in cyclohexane at room temperature has been measured, providing excitation spectra which completely mimic the corresponding absorption spectra of these compounds. The assignment of the 0 [yields] 0 components in the fluorescence spectra is discussed, the conclusion being that both fullerenes must have very ...
Javier Catalan, Jose Elguero
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Nonlinear optical spectra of C70

Chemical Physics, 1999
Abstract We employ a continuously tunable 100 fs pulse source to measure the time-resolved degenerate four-wave-mixing (DFWM) spectrum of an amorphous C 70 film. The observed nonlinear optical response is essentially instantaneous and electronic in origin. We deduce the complex third-order nonlinear-optical susceptibility tensor function χ 1111 (−
F.P. Strohkendl, T.J. Axenson, R.J. Larsen, L.R. Dalton, R.W. Hellwarth, Z.H. Kafafi   +5 more
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Unusual Photoluminescence Behavior of C70

The Journal of Physical Chemistry, 1994
Well-resolved photoluminescence (PL) spectra of C[sub 70] and [sup 13]C[sub 70] in a glassy methylcyclohexane matrix have been obtained over the range 10,000-16,000 cm[sup [minus]1] at temperatures between 4 and 77 K. The PL spectrum consists of a short-lived, red fluorescence system extending from 14 000 to 15 500 cm[sup [minus]1] and a longer-lived ...
S. M. Argentine, A. H. Francis, C.-C. Chen, C. M. Lieber, J. S. Siegel   +4 more
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Photochlorination of C60 and C70 fullerenes

Carbon, 1994
Abstract The photochlorination of pure C 60 and C 70 fullerenes as well as their crude 10:1 molar mixture was studied by UV spectroscopy in comparison with the photochlorination of naphthalene and decacyclene used as model compounds. The photochlorinated products have been characterized by UV and FT-IR spectroscopy and with elemental analysis.
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[The absorption spectrum of C70].

Guang pu xue yu guang pu fen xi = Guang pu, 2010
With the methyl benzene as solution,ultraviolet and visible absorption spectra of the mixture of C60 and C70's methyl benzene saturant solution as specimen, infrared absorption spectrum of the mixture of C60 and C70 was measured. The absorption spectrum of C70 was determined by comparison.
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Thermodynamic properties of fullerite C70

Technical Physics Letters, 2017
A new expression for the isochoric heat capacity and the equation of state of fullerite C70 are obtained in the framework of a quantum-statistical method. Analogs of the Debye law and Dulong–Petit law for this fullerite are formulated. Fullerene C70 molecules are modeled by isotropic quantum oscillators under the assumption that their nonsphericity ...
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Kekule strucutres of C70

2005
Sazetak abstracta: Kekule structures of C70 are analyzed and classified.
Vukičević, Damir, Randić, Milan
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