Alidzhanov E.K., Lantukh Yu.D, Letuta S.N., Pashkevitch S.N., Razdobreev D.A.
THE EXCITATION ENERGY AND CHARGE TRANSFER IN DONOR-ACCEPTOR SYSTEMS BASED ON SEMICONDUCTOR POLYMER ^{[№ 6 ' 2018]}
The effectiveness of energy transfer process of photo-excitation in donor-acceptor (DA) systems formed from semiconductor polymer poly[2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) with the addition of simple and endohedral fullerenes were investigated. It is shown that the energy transfer efficiency in the systems formed in the form of dilute solutions is on several orders of magni-tude higher than the theoretically expected energy transfer efficiency by the diffusion-controlled mechanism. On the basis of comparison of experimentally measured spectra of electron absorption of Y@C₈₂, C₆₀ C₇₀ toluene solutions and the MEH-PPV luminescence spectrum the corresponding Förster radii of resonance energy transfer were estimated. For the tested DA systems a significant effect of exciton mi-gration between polymer links on the process of luminescence quenching was estab-lished. It is shown that the DA system formed using endohedral fullerenes is most effective.

Alidzhanov E.K., Lantukh Yu.D., Pashkevitch S.N., Razdobreev D.A., Bubnov V.P., Kareev I.E.
THE FORMATION OF ENDOMETALLOFULLERENES LANTHANIDES CLUSTERS IN SOLVENT AND ON THE SOLID SURFACE ^{[№ 13 ' 2015]}
The formation of the clusters in solution and on a solid surface can significantly modify the photophysical properties of the studied systems. Process of endometallofullerenes (EMFs) lanthanides (La, Gd, Ce) clusters formation in the polar solvent (dimethylformamide  — DMF) and on the mica surface by static and dynamic light scattering methods as well as atomic force microscopy was investigated. It is shown that endometallofullerenes in the solvent and on the mica surface form a stable system of nanoclusters with predominant dimension 50–60 nm. The combination of the methods of dynamic and static light scattering allowed us to estimate the molar mass of the scattering centers. Based on these data, the conclusion about the fractal nature of the EMF clusters and the estimation of their fractal dimension d ≈ 2.3 has been done. Zeta-potential of the EMF clusters in the DMF solution was measured. It is shown that the EMFs clusters have a negative charge and its zeta-potential value is –30 mV.

Makarow A.G., Razdobreev D.A., Sagida M.O.
THE EFFECT OF TEMPERATURE ON THE SENSITIVITY OF IRON DITELLURIDE ELECTRODE TO ION H₃O^{+ [№ 10 ' 2015]}
Influence of temperature on ability of iron ditelluride electrode to feel change of concentration of ion H₃O⁺ in solution on the example of acid-base electrometric titration with use of a glass electrode as a standard for measurement of рН, is investigated. Dependences of potential of a ditelluride of iron from рН are constructed and coefficients of an inclination of linear sites in the range of temperatures from 20 to 60 °C are calculated. Influence of temperature (in the specified range) on reversibility of electrode process at consecutive change рН from sour (2–2,5 рН) to alkaline (10–11 рН) areas and back is investigated. It is noted, that divergences between two branches of titration increase (towards increase of values рН) from 20 to 40 °C, and then to 60 °C considerably decrease. From the point of view of reversibility of electrode process, the best results were received at 20, 55 and 60 °C. Existence of an alkaline mistake of iron ditelluride electrode at value рН more than 10.5. Differential curves titration are constructed at various temperatures, and correlation of the received peaks with indicators of constants of ionization of the acids, which are a part of titrable mix (acetic, phosphoric, boric acids), is executed. The studied electrode on a basis of a ditelluride of iron, unlike traditionally used glass electrode, doesn't demand application of a thermal compensator for measurement рН at various temperatures, and also possesses quite inert surface which isn't losing mirror gloss at contact with sour or alkaline solutions, water and air for a long time.

Makarov A.G., Razdobreev D.A., Sagida M.O.
SENSORS PH ON THE BASIS CHALCOGENIDES OF IRON ^{[№ 6 ' 2014]}
The behavior the electrodes on the basis chalcogenides of iron of structure of FeS₂, FeSe₂ and FeTe₂ at change of concentration of H₃O⁺-ion in solution have been investigated. Shows the advantages and disadvantages of the electrodes in compari-son with commonly used glass electrode.Tilt of electrode functions in the range рН from 3 to 11 are defined. Describes practical application of the investigated elec-trodes for example titration hydrochloric, sulfuric and phosphoric acids.

Alidzhanov E.K., Lantukh Yu.D., Letuta S.N., Pashkevitch S.N., Loginov B.A.
PHOTOVOLTAIC EFFECT IN THE PHTHALOCYANINE AND PERYLENE ORGANIC JUNCTION LAYERS ^{[№ 12 ' 2011]}
Organic solar sell consisting from PTCDA donor and CuPc acceptor layers was formed. Its photophysical properties were investigated. It was shown that obtained multilayer system has nonlinear I-U dark characteristic and can induce photoelectromotive force jmax =0.6 V. On the base of the investigation of photoelectric cell spectral sensitivity its heterojunction efficient thickness was evaluated.

Razdobreev D.A., Lantukh U.D., Stryapkov A.V., Pashkevich S.N., Alidzhanov E.K.
THIAZINE DYE DIMERIC FORMS DISSOSIATING ABSORPTION SPECTRUMS AND CONSTANTS ^{[№ 2 ' 2004]}
Thiazine dye - methylene blue (Mg+) and thionine (TN+) in water solutions dimeric forms dissociating absorption spectrums and constants are calculated based on spectrumphotometric data. Conclusions on dimeric molecules structure of the dyes are made.