Carbon and van der Waals materials

Kinetics of fragmentation of endohedral metallofullerene clusters in a polar solvent

E. K. Alidzhanov^a, I. E. Kareev^b, V. P. Bubnov^b, A. I. Kotov^b, S. N. Letuta^a, Yu. D. Lantukh^a, D. A. Razdobreev<sup>b

a</sup> Orenburg State University
^b Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Chernogolovka, Moscow region

Abstract: The evolution of the morphology of endohedral metallofullerene La@C$_{82}$ clusters in $N,N$ dimethylformamide with the addition of diethylamine was studied using dynamic and static light scattering methods. It was found that the addition of diethylamine to a solution of endohedral metallofullerene leads to a decrease in the effective value of the hydrodynamic radius of clusters from 100 to 35 nm, and the intensity of light scattering of the solution decreases by 30 times, provided that its molar concentration remains constant. The fractal dimension of La@C$_{82}$ clusters at the initial and final stages of their fragmentation was estimated from the analysis of the angular and concentration dependences of light scattering of endohedral metallofullerene solutions. The results of measurements of the time evolution of the light scattering intensity and the hydrodynamic radius of endohedral metallofullerene clusters formed the basis for assessing the fragmentation rate of EMF clusters.

Keywords: endohedral metallofullerenes, clusters, cluster fragmentation rate, dynamic and static light scattering.

Received: 11.11.2024
Revised: 23.12.2024
Accepted: 24.12.2024

DOI: 10.61011/FTT.2025.02.59993.302

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