Spectroscopic studies of fullerene clusters in N-methyl-2-pyrrolidone

The studies of the peculiarities of the interaction of C-60 with NMP solvent by optical absorption, fluorescence and fluorescence excitation were performed. The results of experiments on the spectroscopy showed a sharp decrease in the optical density of absorption in the region of electronic transitions and a significant decrease in the fluorescence quantum yield of N-methyl-2-pyrrolidone when adding C-60. These facts indicate the effective electron capture of solvent molecules by fullerenes. The line shape and position of fluorescence bands indicate the aggregation of C-60 complexes with NMP depending on the storage time of solution. (C) 2017 Elsevier B.V. All rights reserved.