Kinetics of cluster growth in polar solutions of fullerene: Experimental and theoretical study of C60/NMP solution

Тропин, Т. В.; Jargalan, N.; Авдеев, М. В.; Kyzyma, O. A.; Eremin, Roman A.; Sangaa, D.; Аксенов, В. Л.

doi:10.1016/j.molliq.2012.08.003

Cited by 25 publications

(22 citation statements)

References 47 publications

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“…This broad band was attributed to multiple vibronic excitations activated through an HT coupling orbital to the JT distorted orbital at a higher level, assigned as forbidden singlet-singlet transitions [26]. This experimental absorption feature was in agreement with the pioneering works that reported the absorption spectra of C 60 in toluene [68,69], o-xylene [25], n-hexane [26,[70][71][72], and N-methyl-pyrrolidine (NMP) [73].…”

Section: Resultssupporting

confidence: 86%

The Study of the Optical Properties of C60 Fullerene in Different Organic Solvents

et al. 2019

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C 60 fullerene exhibits unique optical properties that have high potential for wide photooptical applications. To analyze the optical properties of C 60 , its excitation and emission properties were studied using UV-Vis absorption and photoluminescence (PL) spectroscopy, which were performed in various, nonpolar organic solvents such as toluene, xylene, and trichloroethylene (TCE). The C 60 solutions in toluene, xylene, and TCE displayed similar excitation bands at 625, 591, 570, 535, and 404 nm corresponding to A g → T 1u and A g → T 1g transitions. However, these bands differed from the solid C 60 observed by UV-Vis diffuse reflectance spectroscopy. The two emission band energies of C 60 solution in toluene and xylene were nearly the same (1.78 and 1.69 eV), whereas the C 60 solution in TCE was shifted to 1.72 and 1.65 eV. Because the polarity of TCE is higher than that of toluene and xylene, the PL spectrum of the C 60 solution in TCE was red-shifted. The PL spectroscopy had a better capability than UV-Vis absorbance spectroscopy to distinguish the different interactions between C 60 and the organic solvents due to their different solvent polarities.

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Section: Resultssupporting

confidence: 86%

The Study of the Optical Properties of C60 Fullerene in Different Organic Solvents

et al. 2019

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“…The obtained values of k 1 and k 2 can also be used in the modeling of cluster growth in the C 60 /NMP solution. As it was proposed in [11], a model of fullerene aggregation in polar solvents may imply the formation of clusters of C 60 -solvent molecule complexes. Thus, the kinetic equations developed in [11] directly require one to estimate the rate constant values for a given temperature and other external conditions.…”

Section: Resultsmentioning

confidence: 81%

“…As it was proposed in [11], a model of fullerene aggregation in polar solvents may imply the formation of clusters of C 60 -solvent molecule complexes. Thus, the kinetic equations developed in [11] directly require one to estimate the rate constant values for a given temperature and other external conditions. As we have obtained here, the approximate values for stirred samples of k 1 ∼ (0.50 ± 0.15) · 10 −4 s −1 , k 2 ∼ (1.0 ± 0.2) · 10 −3 s −1 for room temperature, and k 1 ∼ (0.8 ± 0.2) · 10 −3 s −1 , k 2 ∼ (0.8 ± 0.2) · 10 −2 s −1 for higher temperatures should be used in further theoretical modeling.…”

Section: Resultsmentioning

confidence: 81%

Investigation and modeling of evolution of C60/NMP solution UV-Vis spectra

Jargalan¹,

Тропин²,

Авдеев³

et al. 2016

Nanosystems: Phys. Chem. Math.

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The kinetics for the dissolution of fullerene C 60 in N-methyl-2-pyrrolidone (NMP) solvent are investigated through measurements of the stirring speed and temperature dependence of the UV-Vis absorption spectra. We develop a model for the kinetics of simultaneously occurring processes in the solution, employing a system of simple kinetic equations and obtain the corresponding parameters dependence on preparation conditions. The obtained results will allow one in the future to consider these effects when modeling the slow growth kinetics of large clusters in C 60 /NMP solutions.

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“…5). Известно, что при растворении в NMP молекулы C 60 агрегируют с образованием устойчивых кластеров, достигающих размера до 0.5 µm [20]. Размер образующихся кластеров молекул C 60 сопоставим с корреляционной длиной ξ микрофлуктуаций плотности в пленке PEI (рис.…”

Section: результаты и их обсуждениеunclassified

Эффекты Микрофазового Разделения И Корреляции Типа Плотность-Плотность В Аморфных Полимерных Пленках

Новиков¹

2021

Физика Твердого Тела

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The topology of density fluctuations on the surface of amorphous films obtained from solutions of some flexible-chain polymers has been studied using electron microscopy data in the submicron and micron scale ranges. It is shown that as the initial concentration of solutions increases, the effects of microphase separation in films increase due to the self-organization of aggregates (clusters) of macromolecules: anisotropy, long-range order, and correlation length of density fluctuations increase. Self-organization ends with the formation of an infinite cluster of particles, periodically-inhomogeneous in density and occupying ~ 30% of the surface of the films. The density – density correlation function of such a cluster on the ~ ξ scale has a universal form that does not depend on the composition and molecular weight of the polymer.

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Kinetics of cluster growth in polar solutions of fullerene: Experimental and theoretical study of C60/NMP solution

Cited by 25 publications

References 47 publications

The Study of the Optical Properties of C60 Fullerene in Different Organic Solvents

The Study of the Optical Properties of C60 Fullerene in Different Organic Solvents

Investigation and modeling of evolution of C60/NMP solution UV-Vis spectra

Эффекты Микрофазового Разделения И Корреляции Типа Плотность-Плотность В Аморфных Полимерных Пленках

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