Supramolecular benzene structure and its changes under the action of dissolved fullerenes

Гинзбург, Б. М.; Tuichiev, Sh.; Yakimanskiĭ, A. V.

doi:10.1134/s1063774511020076

Cited by 7 publications

(17 citation statements)

References 7 publications

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“…The results showed that, in all cases, the saturated fullerene solutions had a higher evaporation rate than pure solvents. These results are in excellent agreement with what Ginsburg et al have reported [37][38][39][40][41]. The unique finding of our current results is the very clear maxima and minima behavior measured.…”

Section: Discussionsupporting

confidence: 94%

On the evaporation kinetics of [60] fullerene in aromatic organic solvents

Amer

Wang

Kollins

et al. 2018

Phys. Chem. Chem. Phys.

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We investigate the effect of C60 fullerene nanospheres on the evaporation kinetics of a number of aromatic solvents with different levels of molecular association, namely, benzene, toluene, and chlorobenzene. The dependence of the evaporation rate on the fullerene concentration is not monotonic but rather exhibits maxima and minima. The results strongly support the notion of molecular structuring within the liquid solvent controlled by the nature of the fullerene/solvent interaction and the level of molecular association within the solvent itself.

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Section: Discussionsupporting

confidence: 94%

On the evaporation kinetics of [60] fullerene in aromatic organic solvents

Amer

Wang

Kollins

et al. 2018

Phys. Chem. Chem. Phys.

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“…149,152,156,158,186,187,197 Also, precise measurements demonstrated that even low fullerene concentrations display expressed and nonmonotonous influence on some properties of aromatic nonpolar solvents. 198−203 The data revealed by structure-sensitive methods 201,203 allow one to expect the lyophobic character of fullerenes solvation, in line with the negative ΔS values of solvation.…”

Section: Fullerenes In Liquids: An Overviewmentioning

confidence: 96%

“…And just in these systems, namely, benzene, toluene, and p-xylene, precise measurements revealed unusual changes of solvent properties even beginning from 10 −4 to 0.05 mass % of C 60 or C 70 . 198−203 The nonmonotone change of the solution density, 198,199 ε r , 201 and the structural ordering of the solvent as detected by wide-angle and small-angle X-ray diffraction studies, 199,200,203 as well as the concentration dependence of the boiling points, 202 allowed one to make a conclusion about the formation of ordered shells around the fullerene molecules. 201,203 More or less detailed models for the structure of the solvates in aromatic solvents were proposed.…”

Section: Evidence Of Solvophobic Solvationmentioning

confidence: 99%

“…198−203 The nonmonotone change of the solution density, 198,199 ε r , 201 and the structural ordering of the solvent as detected by wide-angle and small-angle X-ray diffraction studies, 199,200,203 as well as the concentration dependence of the boiling points, 202 allowed one to make a conclusion about the formation of ordered shells around the fullerene molecules. 201,203 More or less detailed models for the structure of the solvates in aromatic solvents were proposed. 135,198−203 The dynamic light scattering (DLS) data allowed deducing the existence of C 60 •4C 6 H 6 species in benzene solutions, 171 which also exist in the solid state.…”

Section: Evidence Of Solvophobic Solvationmentioning

confidence: 99%

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Fullerenes in Liquid Media: An Unsettling Intrusion into the Solution Chemistry

2013

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“…Though fullerene solutions in such solvents as n-hexane should be considered as true ones, i.e., molecular, some examples of oversaturated solutions with C 60 colloidal species about 200 nm have been reported [22]. On the other hand, Ginzburg et al [23][24][25][26][27] disclosed unusual properties of C 60 and C 70 in aromatic solvents (benzene, toluene, xylenes) using ebullioscopy, X-ray diffraction patterns, and some other methods: the fullerene molecules are surrounded by shells of hundreds aromatic solvent molecules. This allows considering such molecular solutions as a kind of periodic colloidal systems, or colloidal crystals [10].…”

Section: State Of the Artsmentioning

confidence: 99%

Behavior of fullerene C70 in binary organic solvent mixtures as studied using UV-Vis spectra and dynamic light scattering

Marfunin

Mchedlov‐Petrossyan

2019

Chemical Series

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In this paper, the formation of colloidal species of fullerene C 70 in organic solvents was studied. The examining of the UV-visible spectra was accompanied by particle size analysis using dynamic light scattering, DLS. Stock solutions of C 70 in non-polar toluene and n-hexane were diluted with polar solvents acetonitrile and methanol. The appearance of colloidal species with a size within the range of ≈ 50-500 nm is accompanied by alterations of the absorption spectra. In the toluene-acetonitrile and toluene-methanol binary mixed solvents at 25 o C, the absorption spectra of C 70 (5×10-6 M) tend to retain the features of the spectrum in neat aromatic solvent even if the C 70 molecules are gathered into colloidal aggregates. Earlier such phenomenon was observed for C 60 in benzeneacetonitrile and toluene-methanol solvent systems. This gives support to the idea of rather stable primary solvate shells formed by aromatic molecules around the fullerene molecules. The behavior of C 70 in toluene mixtures with methanol was compared with the earlier reported results from this laboratory for the C 60 fullerene in the same solvent system. The study of n-hexane-methanol mixtures was performed at elevated temperature because of limited miscibility of these solvents at 25 o C. Accordingly, the C 70-toluene-methanol system was also examined at 40 o C. A small but distinctly noticeable difference was revealed. Whereas in the case of the last-named system, the absorption spectrum typical for molecular form of C 70 is still observable when colloidal species are already present in the solution, the turning-point between molecules and colloids as determined by both UVvisible spectra and DLS coincides for the n-hexane-methanol binary mixed solvent. Hence, the solvation shells formed by the aliphatic solvent around C 70 are less stable as compared with those formed by toluene. Finally, the absorption spectra of C 70 in the mixed solvents toluene-n-hexane were analyzed. These data give some support to the assumption of preferable solvation of the C 70 molecules by the aromatic co-solvent.

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Supramolecular benzene structure and its changes under the action of dissolved fullerenes

Cited by 7 publications

References 7 publications

On the evaporation kinetics of [60] fullerene in aromatic organic solvents

On the evaporation kinetics of [60] fullerene in aromatic organic solvents

Fullerenes in Liquid Media: An Unsettling Intrusion into the Solution Chemistry

Behavior of fullerene C70 in binary organic solvent mixtures as studied using UV-Vis spectra and dynamic light scattering

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