Synthesis and Characterization of Copolymers of Lantanide Complexes with Styrene

Сopolymers of 2-methyl-5-phenylpentene-1-dione-3,5 with styrene in ratio 5:95, which containing Eu, Yb and Eu, Yb with 1,10-phenanthroline were synthesized at the first time. The luminescence spectra of obtained metal complexes and copolymers in solutions, films and solid state are investigated and analyzed. The solubilization of β-diketonate complexes with phenanthroline was shown to change luminescence intensity in such complexes. Obtained copolymers can be used as potential materials for organic light-emitting devices

Mechanisms of Public Administration of the Small and Medium-Sized Enterprises

CC BY-NC-ND 4.0The article is devoted to the problem of improving the efficiency of state mechanisms of tourism development. The article analyzes the trends in the development of small and medium-sized enterprises in the tourism industry, since these enterprises form the economic base of this industry. As a result of the analysis, the main approaches to the formation of the system of public administration mechanisms in tourism sector were identified and the system of marketing communications for the development of small and medium entrepreneurship was analyzed. The results of the analysis of domestic and foreign experience have shown that approaches to the formation of marketing communications at the state level differ significantly. The paper provides general recommendations for the establishment of the system of marketing communications of small and medium-sized enterprises in the tourism industry at the state level, as well as mechanisms for analyzing its efficiency by building an economic-mathematical model for forecasting optimistic, realistic and pessimistic scenarios