Peculiarities of C70 Fullerene in a Binary Mixture of Xylene and Tetrahydrofuran

The optical and morphological properties of C70 fullerene in binary xylene/tetrahydrofuran solutions were systematically studied using UV-Vis absorption and Raman spectroscopy, refractometry, pycnometry, and dynamic light scattering (DLS). It was found that during storage of a molecular solution, the increase in intermolecular interactions and the onset of the self-assembly process of C70 molecules significantly affect the properties of the solution. A correlation was established between the formation of C70 nanoaggregates in solution and the changes in their properties (optical absorption, refractive index, density, and Raman spectra).