The effect of ultradispersion on the chemical shifts of the X-ray $K$ lines in copper and manganese oxides

The results of study of shifts of X-ray $K_\alpha$ and $K_\beta$ lines of manganese and copper obtained for CuO, MnO, Mn$_{3}$O$_{4}$ and MnO$_{2}$ oxide nanoparticles (relative to the corresponding massive materials) are presented. Oxide nanoparticles were synthesized in the pores of borosilicate glasses with an average pore diameter of 7 $\pm$ 1 nm from the corresponding nitrates introduced into the pores by capillary impregnation. It was found, that for nanocomposites with CuO and Mn$_{3}$O$_{4}$ there is a small (about $\sim$ 0.1 el./atom) increase in the role of 3$d$ electrons in the chemical bonds. On the contrary, for nanocomposites with MnO$_{2}$ the role of these electrons has an opposite trend.