Nechytaylo V. Optical and Electrochemical Properties of Structures with Variable Composition and Valency on the base of transition metal oxides and cyanoferrates

The results of experimental studies of the structure, optical and electrochemical properties of the ferric, cobalt, nickel, cupric aquapentacyanoferrates and tungsten trioxide are reported. A new approach for a modification of composition and properties of ferric hexacyanoferrate (FHCF)-like compounds has been developed. Electrochromic effect in ferric aquapentacyanoferrate (FAPCF) films has been discovered and studied. The suggestion on the reasons of the differences in the electrochromic behavior of FAPCF and FHCF has been made. The formation of the nanostructures of cobalt, nickel, cupric hexa- and aquapenta- cyanoferrates inside mesoporous MCM-41 template is shown. Factors that control the response time and cycle life of tungsten trioxide electrochromic devices are investigated. A new electrochromic device, in which the great stability of tungsten trioxide film is ensured, has been developed.