Investigation of the spectral properties of non-complex complexes of a water-soluble polysubstituted derivative of С$_{60}$ fullerene and chlorin e6 in polar solvents

The formation of non-covalent electrostatic complexes based on the water-soluble fullerene derivative (WSFD) and chlorin e6, dissolved in water or in ethanol was showed by absorption and fluorescent spectroscopy methods. As a result of the formation of such complexes, the chlorine e6 absorption spectrum changed with a bathochromic shift and its fluorescence was effectively quenched. The Stern–Volmer constants of complex are 7.3 $\cdot$ 10$^{5}$ и 2 $\cdot$ 10$^5$M$^{-1}$ in water and ethanol, respectively. It was found that complex consists of 1 molecule of WSFD and 3 dye molecules in aqueous solution, while in ethanol this ratio is 1:1.