The spectral and luminescent properties of N 2 O 2 -type aromatic azomethines, N , N '-bis(salicylidene)-1,4-butylenediamine, N , N '-bis(5-bromosalicylidene)-1,4-butylenediamine, and their complexes with Zn(II), have been studied. All compounds at 293 K fluoresce in solutions and in a polycrystalline state. An increase in the fluorescence intensity of the azomethines in alcohol solutions occurs upon their conversion to the quinoid form. The main photoluminescent parameters of solutions of the compounds in DMF and DMSO have been determined. Depending on the presence of bromoaryl substituents in the structure of the ligands and the solvent properties, the zinc complexes fluoresce with quantum yields up to 50%.

A Zn(II) complex with N,N'-bis(5-bromosalicylidene)ethylenediamine exhibiting intense visible blue luminescence is synthesized. It is found that the zinc complex fluoresces at 293 K in both polycrystalline form and in solutions (λ max = 440 and 450 nm, respectively); the relative fluorescence quantum yields of the complex are determined in dilute ethanol, dimethylformamide, and dimethylsulfoxide solutions.

Electrochemical oxidation of N-(3-methoxysalicylidene)-o-anisidine and the corresponding Zn(II) complex under potentiodynamic and potentiostatic conditions has resulted in the formation of conductive polymer films on the surface of platinum electrode. Optimal conditions (potential and duration of electrode polarization in a solution of the monomer) of potentiostatic synthesis of polymeric azomethine have been elaborated. Diffusion coefficients of charges and activation energies of charge transfer in the studied polymers are reported.

Conducting polymeric Cu(II) complexes with aromatic azomethines derived from salicylic and 3-methoxysalicylic aldehydes exhibit photovoltaic activity. The effect exerted on the photopotential of the modified electrodes by the layer thickness, redox state of the polymers, and electron-donor and electron-acceptor components introduced into the supporting electrolyte solution is examined.

The results of synthesis of new Pt(II) complexes with N,N′-ethylene-bis(3-methoxysalicylideneiminate) and N,N′-2,3-dimethylbutane-2,3-diyl-bis(3-methoxysalicylideneiminate) ligands and their investigation by X-ray photoelectron spectroscopy and UV-visible absorption and emission spectroscopy are discussed. The degradation channels of excited electronic states of the complexes are determined.

A conductive polymer based on the Cu(II) complex with N,N′-bis(salicylidene)-1,3-propylenediamine was obtained electrochemically. The optimal mode of the synthesis of the polymer under potentiostatic conditions was found. We determined the charge diffusion coefficient and activation barrier and elucidated the nature of the limiting step of the charge transfer in the polymer bulk in the electrolyte medium. The azomethine base, Cu(II) complex, and its polymer form in the oxidized and reduced states were characterized by X-ray photoelectron spectroscopy and electron absorption spectroscopy.

The rate of photochemical reaction in solutions of luminescent platinum(II) complex with 8-quinolinol was studied in relation to the type of solvent, irradiation time, photon energy and intensity of a luminous flux, concentration of the complex, and presence of oxygen. The structure of the photochemical reaction product was studied by X-ray photoelectron, IR, and electronic absorption spectroscopy. The quantitative kinetic parameters and quantum yield of the photochemical reaction performed under various irradiation conditions are reported.

Oxidative electrochemical synthesis and formation kinetics of electrically conducting polymeric platinum(II) complexes with 8-quinolinol was studied. Spectroscopic and electrochemical properties of the polymers were characterized.

New thin polymeric films were prepared electrochemically on the basis of Ni(II), Pd(II), and Pt(II) complexes with 8-quinolinol, and conditions of synthesis were optimized. Basic characteristics of the films such as the thickness, charge transfer rate in the polymeric matrix, and photovoltaic effect were determined.

The possibility of polymerization of the nickel(II) complex with a pyridine-type ligand, i.e., 8-hydroxyquinoline (Hqol) was studied. It was found that poly[Ni(qol) 2 ] possesses electrical conduction in a supporting electrolyte solution and photo and electrochemical activities.

The results of a study of photochemical properties of Pt(II) complexes with tetradentate ligands, namely, methyl-N,N′-ethylene-bis(salicylideneimine) [Pt(Salpn-1,2)] and N,N′ -propylene-bis(salicylideneimine) [Pt(Salpn-1,3)] in acetonitrile, dichloromethane, ethanol, DMF, and DMSO solutions are discussed. The quantum yield of photochemical reactions of the corresponding Pt(II) complexes was found to decrease with the decreasing γ-acceptor properties of the ligands in a series Salen-Salpn-1,2-Salpn-1,3.

New experimental data characterizing the conditions of electrochemical synthesis of stable electrically conducting electrochromic polymeric film systems based on the complexes [Ni(Salpn-1,3)] and [Cu(Salpn-1,3)] [Salpn-1,3 is N,N′-propylenebis(salicylidenimine)] in a 0.1 M Bu4NClO4/CH2Cl2 solution are presented. The redox conductivity of the new polymers is characterized by the charge diffusion coefficient. The electrochemical stability of the polymeric films is analyzed in relation to the potential and time of accumulation, and also to the range of potential sweeping.

Polymers based on the Pd(II) and Ni(II) complexes with 1,2-bis( o- aminobenzylidene)ethylenediamine and exhibiting conducting properties are synthesized. The kinetic regularities of polymer formation on solid substrates and dependence of the rate of charge diffusion in a bulk of polymer matrix on the polymer thickness are established.

Electrochemical synthesis of conducting polymeric Ni(II) complexes with N , N '-bis(salicylidene)ethylenediamine and N , N '-bis(salicylidene)- o -phenylenediamine was studied. The kinetic of this process was examined. The possibility of preparing the polymeric films with a definite thickness ranging from 0.01 to 2 μm was assessed.

New experimental data on physicochemical properties of polymeric nickel(II) complexes with N,N'-bis(salicylidene)ethylenediamine and N,N'-bis(salicylidene)-o-phenylenediamine (including redox conductivity, photoactivity in a solution of a supporting electrolyte, and electrochemical stability) were obtained. The rate of charge transport in the polymeric matrix was studied as a function of the polymer film thickness.

The electron transfer rate in the bulk of a [PdSalpn-1,2] polymeric film was studied as influenced by its thickness and the composition of the supporting electrolyte.

The composition and structure of the mononuclear Pt(II) complexes with N,N'-bis(salicylidene)-ethylenediamine (salen) and polymers on its basis were studied by X-ray photoelectron spectroscopy. The Pt(salen) polymer contains platinum in two oxidation states Pt(II) and Pt(IV), and the atomic Pt(II)/Pt(IV) ratio depends on the conditions of the electrochemical synthesis. The presence of platinum in different oxidation states previews the exchange character of the bonds between metal centers and the reversibility of the reaction 2Pt(III) -> Pt(II) + Pt(IV). The supporting electrolyte-tetrabuthylammonium perchlorate (Bu(4)NClO(4))-stabilizes the electrically excited complex [Pt(III)(salen)](-). This complex, formed as a result of electron transfer from Pt(II) onto the ligand, is the central component of the processes taking place upon the synthesis of Pt(salen) polymers and determines their unique photochemical properties. A redox reaction mechanism in the electrode-polymer-electrolytic medium system with the initial mononuclear complex is suggested.