Results 171 to 180 of about 32,872 (215)

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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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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Structural phase transformations in C70

Journal of the Chemical Society, Chemical Communications, 1992
Powder X-ray diffraction shows that on sublimation, solvent free C70 crystallizes in a hexagonal close packed (HCP1) arrangement with small admixture of a second hexagonal close placked (HCP2) phase as well as a face centred cubic (FCC) phase, the proportions of which are progressively transformed by annealing in vacuo at 300 °C via HCP2 to FCC.
M. A. Green, M. Kurmoo, P. Day, K. Kikuchi   +3 more
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ChemInform Abstract: C70 Fulleryl Radicals.

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.
A. LAPPAS, K. VAVEKIS, K. PRASSIDES
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Crystal structure of solid C70

Pramana, 1993
Detailed analysis of the room temperature X-ray powder diffraction data of pure solid C70 is reported. C70 prepared by slow evaporation from toluene solution adopts an hcp structure (space groupP63/mmc) witha=10·53(1) A andc=17·24(1) A. C70 sublimed on to Si wafer adopts an fcc structure witha=14·89(1) A.
M C Valsakumar, N Subramanian, M Yousuf, P Ch Sahu, Y Hariharan, A Bharathi, V Sankara Sastry, J Janaki, G V N Rao, T S Radhakrishnan, C S Sundar   +10 more
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