C₇₀ in Benzene, Hexane, and Toluene Solutions

Abstract

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.

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

“…The detail structural investigations of our crystals are reported in our previous paper. 18 The thermogravimetrical experiments made on our sample showed a sharp anomaly at 150°C with a mass loss of 10-12% again close to the results of Agafonov et al 13 Taking into account these similarities, we suggest the same 1:1 composition of C70 to benzene for our crystals. The crystals appear to be stable even for several months of exposition.…”

“…These results are close to the data of Agafonov et al ( 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 1 X-ray powder patterns for C 70 samples: (1) starting powder provided by MER corporation, (2) crushed crystals grown from the benzene solution. …”

Hierarchically Structured Fullerene C70 Cube for Sensing Volatile Aromatic Solvent Vapors

“…The pXRD pattern of HFC ( Figure S23) was indexed as mixed phases of hexagonal (a = 2.527 nm, and c = 1.669 nm) and orthorhombic (a = 2.370 nm, b = 3.228 nm, c = 1.070 nm) structures. [45][46][47] Similar mixed phases have previously been found in porous fullerene C60 crystals. 42,48 The mechanism of structural rearrangement relies initially on the solubility of solvated C70 cube surface in IPA, and solvating mesitylene also plays a key role for this transformation.…”

“…Nitrogen adsorption isotherms and corresponding pore size distributions are supplied in Figure S22. The pXRD pattern of HFC (Figure S23) was indexed as mixed phases of hexagonal ( a = 2.527 nm and c = 1.669 nm) and orthorhombic ( a = 2.370 nm, b = 3.228 nm, c = 1.070 nm) structures. − Similar mixed phases have previously been found in porous fullerene C 60 crystals. , …”

Self-assembly of carbon based nanoparticles films by Langmuir-Blodgett method

“…Fullerenes are commonly produced in plasma reactions among carbon atoms and clusters at temperatures between 4000 and 8000 K. [16][17][18][19][20][21][22][23][24][25] Unlike other allotropes, fullerenes are soluble in non-polar solvents, such as toluene, benzene, chlorobenzene, dichloromethane, carbon disulfide and 1,2,3-trichloropropane. [26][27][28] Fullerenes are practically insoluble in methanol and highly insoluble in water. However, till recently the fullerenes are the only wellknown allotrope of carbon which could be dissolved in commonly used solvents at room temperature.…”