The peculiar behavior of fullerene C60 in mixtures of ‘good’ and polar solvents: Colloidal particles in the toluene–methanol mixtures and some other systems

Mchedlov‐Petrossyan, Nikolay O.; Kamneva, N.N.; Al-Shuuchi, Y.T.M.; Marynin, Andriy; Shekhovtsov, Sergey V.

doi:10.1016/j.colsurfa.2016.09.045

Cited by 25 publications

(35 citation statements)

References 41 publications

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“…[13]. Note, that in acetonitrile-reach mixed solvents, the size of colloidal species is substantially smaller as compared with those just after the turning-point ( Figure 2, right and Figure 3), like in the C 60 -toluene-methanol system [20]. In the previous studies on C 60 in this laboratory, similar regularities were observed.…”

Section: Toluene-acetonitrile System 25 °Csupporting

confidence: 79%

“…% CH 3 OH [20]. Basing on both DLS and spectrophotometry, some other regularity concerning the above system were also discussed in this paper [20]. In another publication [21], the peculiarities of C 60 behavior in benzene-acetonitrile systems were reported.…”

Section: State Of the Artsmentioning

confidence: 80%

“…On going from 4 × 10 −7 M to 4 × 10 −5 M C 60 , the threshold changes from 67.5 to 55.0-57.5 vol. % CH 3 OH [20]. Basing on both DLS and spectrophotometry, some other regularity concerning the above system were also discussed in this paper [20].…”

Section: State Of the Artsmentioning

confidence: 91%

“…A study in our laboratory showed that the critical composition depends on the fullerene concentration, at least for the C 60 -toluene-methanol system [20]. On going from 4 × 10 −7 M to 4 × 10 −5 M C 60 , the threshold changes from 67.5 to 55.0-57.5 vol.…”

Section: State Of the Artsmentioning

confidence: 97%

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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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Section: Toluene-acetonitrile System 25 °Csupporting

confidence: 79%

Section: State Of the Artsmentioning

confidence: 80%

Section: State Of the Artsmentioning

confidence: 91%

Section: State Of the Artsmentioning

confidence: 97%

See 2 more Smart Citations

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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“…Ранiше передбачалось, що агрегацiя фуле-ренiв виникає при певнiй полярностi розчинника. Так, були визначенi [14,15] i уточненi [16] конкре-тнi значення дiелектричної сталої розчинника, за яких виникає агрегацiя С 60 ( = 13 згiдно з [14], = 19-23 вiдповiдно до [16]) i С 70 ( = 27-31 за даними з [15]). Однак з огляду на останнi роботи з агрегацiї фулерену у неполярних розчинниках, мо-жна зробити висновок про те, що цей процес має бiльш складний характер.…”

Section: вступunclassified

Fullerene Clustering in C70/N-Methyl-2-Pyrrolidone/Toluene Liquid System

et al. 2018

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Solubilization and Dispersion of Carbon Allotropes and Their Metal-Complex Composites

Kharisov

Kharissova

2019

Carbon Allotropes: Metal-Complex Chemistry, Properties and Applications

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The peculiar behavior of fullerene C60 in mixtures of ‘good’ and polar solvents: Colloidal particles in the toluene–methanol mixtures and some other systems

Cited by 25 publications

References 41 publications

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

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

Fullerene Clustering in C70/N-Methyl-2-Pyrrolidone/Toluene Liquid System

Solubilization and Dispersion of Carbon Allotropes and Their Metal-Complex Composites

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