Optical spectroscopy of conducting Schiff-base polymer films

Polymer samples of complexes of divalent copper with the H₂msalpn-1,3 ligand have been studied by optical spectroscopy. The optical density spectra of metal-polymer films have been analyzed taking into account the influence of preliminary thermal treatment. The spectral dependences of the absorption coefficient and optical band gap are determined for different experimental conditions.     

Dielectric properties of polymer structures of the azomethine base with an inclusion of a metal center

The results of studying the temperature-frequency dependences of the dielectric parameters of metal-polymer films of poly-[CumSalpn-1,3] are presented. The dispersion of polarization characteristics has been established in the ranges of frequencies f = 10²–10⁶ Hz and temperatures T = 293–340 K. The temperature dependence of the parameter of dielectric relaxation time distribution has been obtained. The role of the temperature factor in the charge processes under study has been discussed.     

Spectrophotometric analysis of a high-temperature phase transition in lead tetroxide Pb3O4

We have investigated the influence of a phase transition in polycrystalline layers of lead tetroxide Pb₃O₄ on their diffuse reflection spectra in the wavelength range of 380–700 nm. We have determined differences in the character of the spectral dependences of the reflection coefficient and surface morphology that are related to the formation of a new high-temperature phase. We have determined values of the optical band gap from analysis of the diffuse reflection spectra of this metal oxide semiconductor compound under normal conditions and after its transition from the tetragonal to an orthorhombic modification.     

Optical spectroscopy of azomethine-base (H2msalpn-1,3) polymer films

A comparative study of the optical properties of azomethine-base polymer structures in the oxidized and reduced states obtained by electrochemical synthesis have been performed. A difference in the character of the spectral dependence of optical density in the wavelength range λ = 550–700 nm and a higher transparency of the Poly(H₂msalpn-1,3) structure in the reduced state in the spectral range under consideration have been revealed. Analysis of the differential spectrum of optical density of the oxidized state and the values of calculated band gaps suggests that the polymer system in the oxidized state has a higher electroactivity.