Results 171 to 180 of about 32,729 (203)

Vibrational frequencies of C70

Chemical Physics Letters, 1992
Abstract A vibrational potential function is proposed for C 70 in terms of stretching, bending and non-bonded interactions. The calculated frequencies fit the experimental infrared and Raman active vibrations. The force field is discussed and differences and similarities with previous normal mode calculations are pointed out.
PROCACCI, PIERO, CARDINI, GIANNI, SALVI, PIER REMIGIO, SCHETTINO, VINCENZO   +3 more
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Synthesis and molecular structures of heptafluoropropylated fullerenes: C70(n-C3F7)8, C70(n-C3F7)6O, and C70(C3F7)4

Journal of Fluorine Chemistry, 2010
Abstract Ampoule reactions of C70 with n- and i-C3F7I were carried out at 250–310 °C. Two step HPLC separations allowed the isolation of several C70(n-C3F7)4–8 and C70(i-C3F7)4 compounds. Crystal and molecular structures of C70(n-C3F7)8-V, C70(n-C3F7)6O, C70(n-C3F7)4, and three isomers of C70(i-C3F7)4 have been determined by X-ray crystallography ...
Tatyana Mutig, Erhard Kemnitz, Sergey I. Troyanov   +2 more
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Vibrational spectrum of C70

Chemical Physics Letters, 1992
We report the vibrational density of states (VDOS) for the C70 molecule calculated using the recursion method. The Born potential is adopted for calculating the dynamic matrix. The results show that the peak positions of the VDOS for the C70 molecule are in reasonable qualitative agreement with those of Raman and infrared measurements.
Haibo Xia, Qing Jiang, Decheng Tian
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Fullerenes C60 and C70 in flames

Nature, 1991
The fullerenes C60 and C70 were first identified in carbon vapour produced by laser irradiation of graphite, and have recently been produced in macroscopic quantities by vaporization of graphite with resistive heating. It has also been suggested that fullerenes might be formed in sooting flames, and indeed all-carbon ions with mass/charge ratios ...
J B, Howard, J T, McKinnon, Y, Makarovsky, A L, Lafleur, M E, Johnson   +4 more
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Organometallic C70 chemistry. Preparation and crystallographic studies of (η2-C70)Pd(PPh3)2 · CH2Cl2 and (C70) · 2{(η5-C5H5)2Fe}

Journal of Organometallic Chemistry, 1999
Abstract Treatment of a solution of C70 with solutions of Pd(PPh3)4 or ferrocene result in the formation of either black–brown (η2-C70)Pd(PPh3)2 · CH2Cl2 or metallic-black C70 · 2{(η5-C5H5)2Fe}, respectively. Crystallographic examination of the palladium complex reveals that the metal is coordinated to the ab bond (a highly pyramidalized 6:6 ring ...
Marilyn M Olmstead, Leijun Hao, Alan L Balch   +2 more
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Physico-chemical properties of C70-l-threonine bisadduct (C70(C4H9NO2)2) aqueous solutions

Journal of Molecular Liquids, 2019
Abstract The paper is devoted to the physico-chemical investigation of the C70-Thr aqueous solutions. In the framework of our study, we measured densities (ρ), viscosities (η), refraction indexes (nD) and surface tension (γ) in a wide range of concentrations. Experimental data on size distribution and ζ-potentials of the C70-Thr associates in aqueous
Evgeny B. Serebryakov, Dmitry N. Zakusilo, Konstantin N. Semenov, Nikolay A. Charykov, Aleksandr V. Akentiev, Boris A. Noskov, Andrey V. Petrov, Nikita E. Podolsky, Anton S. Mazur, Larisa V. Dul'neva, Igor V. Murin   +10 more
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Preparation, crystallographic characterization and theoretical study of C70(CF3)16 and C70(CF3)18

Chemical Communications, 2006
C70(CF3)16 and C70(CF3)18, the first trifluoromethylated fullerene derivatives to comprise a pair of adjacent CF3 groups, have been isolated from a mixture obtained via reaction of C70 with CF3I, characterized in a single crystal XRD study and theoretically investigated at the DFT level of theory.
Stanislav M, Avdoshenko, Alexey A, Goryunkov, Ilya N, Ioffe, Daria V, Ignat'eva, Lev N, Sidorov, Philip, Pattison, Erhard, Kemnitz, Sergey I, Troyanov   +7 more
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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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Photoconductivity of C60/C70 films

Synthetic Metals, 1992
We report results on the steady-state photoconductivity of solid C60/C70 films including a comparison between the optical absorption and the photocondutivity action spectra, and the photocurrent temperature dependence at different wavelengths. We observed photoconductivity in the visible range of the spectrum, the temperature dependence of which ...
M. Kaiser, J. Reichenbach, H.J. Byrne, J. Anders, W. Maser, S. Roth, A. Zahab, P. Bernier   +7 more
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Density functional studies on the endohedral complex of fullerene C70 with tetrahedrane (C4H4): C4H4@C70

Journal of Molecular Modeling, 2012
B3LYP/6-31G(d) hybrid HF/DFT calculations were carried out to determine the structural and electronic properties of the endohedral complex of a C(70) cage with tetrahedrane (C(4)H(4)). It was demonstrated that the formation of the complex is endothermic, with a destabilization energy of 72.56 kcal mol(-1).
Xiao-Yuan, Ren, Cai-Ying, Jiang
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