The aim of the research is to find the basic physical regularities of selfaggregation of Cwiand C70 fullerenes molecules in a number of organic solvents, as well as their influence on optical and nonlinear optical properties of solutions.
The scientific novelty of the research consists of the following:
Structural and dimensional features of nanoaggregates (C^m and (C70)m in solutions prepared in two different ways - equilibrium and strongly nonequilibrium - were studied by high-resolution transmission electron microscopy and atomic-force microscopy methods;
The most likely models of self-aggregation molecules of and in organic solvents were proposed;
Correlations between the processes of nonlinear rotation of polarization ellipse, change of electronic absorption spectra of solutions of fullerenes and processes of self-aggregation molecules of C«), C70 in solutions were demonstrated;
Implementation of the research results. On the basis of the results of a study of the clusterization of C«) and C70 fullerenes molecules in solutions, as well as their influence on optical and nonlinear optical properties of solutions:
scientific results obtained in the course of experimental studies of the effect of nonlinear self-rotation of the ellipse of polarization of high-intensity light pulses in solutions of C7o fullerene in various organic solvents that were used to determine and compare the exact calculated theoretical values of the nonlinear parameters of condensed matter within the framework of the grant project No F-2-49 on the topic “Quasisynchronous interactions of ultra-short laser pulses in media with spatial modulation of quadratic and cubic nonlinear susceptibilities” (Reference No. FTA-02-11/527 of Agency for Science and Technology the Republic of Uzbekistan dated August 23, 2017). The use of scientific results made it possible to establish contributions of nonlinear additives to the refractive index, as well as nonlinear optical susceptibilities of condensed media;
scientific results obtained in the study of the self-assembly and selfaggregation of fullerene and molecules in solutions by high-sensitivity electron microscopy and optical spectroscopy methods that were used in determining the spectral characteristics of the "porphyrin-ftillerene" supramolecular compound, and also in evaluating the energy efficiency of charge separation of a given compound within the framework of the grant project No F2-FA-F147+F139 on the topic “The study of the physical mechanisms of highly efficient conversion of direct and concentrated solar radiation in the primary processes of photosynthesis” (Reference No. FTA-02-11/650 of Agency for Science and Technology the Republic of Uzbekistan dated September 14, 2017). The use of scientific results made it possible to estimate the energy efficiency of the flux of photo induced electrons in supramolecular compounds.
The structure and volume of the dissertation. The dissertation is presented on 130 pages consisting of an introduction, four chapters, a conclusion and a list of references.
