Fullerene C70, toluene 1:1 solvate: structural and thermodynamic evidences

Агафонов, В.; Céolin, R.; André, Daniel; Bruijn, J. de; Gonthier-Vassal, A.; Szwarc, H.; Rodier, N.; Dugué, Jérôme; Toscani, Siro; Sizaret, P; Fabre, Claude; Greugny, Virginie; Rassat, A.

doi:10.1016/0009-2614(93)80078-4

Cited by 17 publications

(18 citation statements)

References 10 publications

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“…These results are close to the data of Agafonov et al 13 (a ) 21.075 Å, b ) 32.99 Å, c ) 10.84 Å, and V ) 7540 Å 3 ) for toluene solvate. The detail structural investigations of our crystals are reported in our previous paper.…”

Section: Methodssupporting

confidence: 94%

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Dielectric Properties of C₇₀-Solvate Crystals Grown from a Benzene Solution

et al. 1998

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C 70 crystals with size up to 3 × 3 × 0.2 mm were grown from benzene solution. The real and imaginary parts of the complex conductivity of this crystals were studied in the frequency range 20 Hz-1 MHz and the temperature range from 10 K to the room temperature. The temperature dependence of the real and imaginary parts of conductivity showed two frequency-independent anomalies at 150 and 275 K. These anomalies are interpreted as phase transitions.

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Section: Methodssupporting

confidence: 94%

“…On the other hand, some authors 11 reported a pure C 70 hcp structure obtained by evaporation of toluene solution at 110 °C. These authors suggested a difference in the growth temperature in order to explain why they did not obtain the solvated structure found in ref .…”

Section: Intoductionmentioning

confidence: 95%

Dielectric Properties of C₇₀-Solvate Crystals Grown from a Benzene Solution

et al. 1998

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“…On the other hand, crystallization experiments showed that there are some certain structural changes in crystals grown at different temperatures both for toluene 1,8 …”

Section: Heating Experimentsmentioning

confidence: 98%

“…, while the sample prepared from large platelets by very gentle crushing gives a ) 20.99 Å, b ) 32.85 Å, c ) 11.01 Å, V ) 7.596 Å 3 (a ) 21.075, b ) 32.99, c ) 10.84 Å, and V ) 7540 Å 3 by the data for toluene solvate, Agafonov et al1 ) It is known that crushing of pure C 70 produces stacking faults, but in the our case it can be complicated by partial loss of solvent during the crushing. The single-crystal methods showed that it is typical for these crystals to have extremely bad packing along the b direction.…”

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confidence: 99%

C₇₀ in Benzene, Hexane, and Toluene Solutions

Talyzin

Engström

1998

J. Phys. Chem. B

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The structural transformations of the C 70 in benzene, toluene, and hexane solutions were studied. The X-ray powder diffraction experiments made directly on the C 70 solution samples showed structural transformations of similar types for all the tested solvents. It is shown that C 70 in benzene and hexane solution forms solvated phases at room temperature similar to the toluene solvate described before (Agafonov, V.; Ceolin, R.; Andre, D.; De Bruijn, J.; Gonthier-Vassal, A.; Szwarc, H.; Rodier, N.; Dugue, J.; Toscani, S.; Sizaret, P. Y.; Fabre, C.; Greugny, V.; Rassat, A. Chem. Phys. Lett. 1993, 208, 68). Experiments with C 70 crystallized from benzene solutions performed at room temperature resulted in the formation of the orthorhombic solvated phase, while crystals grown at T > 40°C appeared to be a mixture of the pure C 70 hcp phase and the monoclinic solvate phase.

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“…Crystal structure determination proved that c 7 0 molecules exhibit a rugby-ball shape with D5h symmetry. 35 From group theoretical considerations, 53 Raman active and 31 IR active modes for the C70 molecule are expected. The other modes are infrared inactive and Raman forbidden, respectively.…”

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confidence: 99%

FT-Raman Spectroscopic Studies of C60 and C70 Subsequent to Chromatographic Separation Including Solvent Effects

Lynch¹,

Tanke²,

Menzel³

et al. 1995

J. Phys. Chem.

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c6&70 containing soot was produced by arc-vaporization of graphite. The chromatographic separation of soot yielded fairly pure Cm and C70 samples. High-resolution FT-Raman spectra of c 6 0 and C70 specimen as well as c 6 0 and C70 solutions including polarization measurements are recorded. Compared to the spectrum of solid c60, some Raman bands of the Cm solution change their position and shape. Even the purest commercial C~O samples contain solvent inclusions (impurities) in the order of some percentage. The chromatographic separation combined with Raman polarization measurements of solutions allows an evaluation of the fundamental vibrations of the c 6 0 molecule. Its assignment, in accordance with the group theoretical expectation, is proposed. The existence of small amounts of c 6 0 isomers (symmetry, e.g., Czvr D z~, D z~) in icosahedral c 6 0 (Zh) is affirmed based on the polarization measurements. For C70 the most extended set of Raman frequencies is presented.

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Fullerene C70, toluene 1:1 solvate: structural and thermodynamic evidences

Cited by 17 publications

References 10 publications

Dielectric Properties of C₇₀-Solvate Crystals Grown from a Benzene Solution

Dielectric Properties of C₇₀-Solvate Crystals Grown from a Benzene Solution

C₇₀ in Benzene, Hexane, and Toluene Solutions

FT-Raman Spectroscopic Studies of C60 and C70 Subsequent to Chromatographic Separation Including Solvent Effects

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Fullerene C70, toluene 1:1 solvate: structural and thermodynamic evidences

Cited by 17 publications

References 10 publications

Dielectric Properties of C70-Solvate Crystals Grown from a Benzene Solution

Dielectric Properties of C70-Solvate Crystals Grown from a Benzene Solution

C70 in Benzene, Hexane, and Toluene Solutions

FT-Raman Spectroscopic Studies of C60 and C70 Subsequent to Chromatographic Separation Including Solvent Effects

Contact Info

Product

Resources

About

Dielectric Properties of C₇₀-Solvate Crystals Grown from a Benzene Solution

Dielectric Properties of C₇₀-Solvate Crystals Grown from a Benzene Solution

C₇₀ in Benzene, Hexane, and Toluene Solutions