Alexey Kolendo

Some Light-Sensitive Imide Molecular Systems with the Determined Functional Properties

Abstract Some unconjugated molecular systems with different kinds of intramolecular energy transfer are proposed and discussed.

Multifunctional Macromolecules and Structures as One-Way Exciton Conductors

Abstract The first steps in the design, investigations and possible applications of multifunctional macromolecules exhibiting one-way direct exciton conductivity are presented. Some problems that appeared during the formation of these systems are discussed.

Photochemical Surface Modification of Polyethylene Films by New Azidobenzenesulfonamides

New azidobenzenesulfonamides are synthesized. Their photophysical and photochemical properties have been investigated. The photophysical properties of these compounds were investigated by 1H NMR, IR, and UV spectroscopy. The surface photomodification of polyethylene (PE) films by using new azidobenzenesulfonamides is carried out. The wetting angles for three liquids of different polarities (water, formamide, and diiodomethane) have been studied to estimate the surface modification performed. The obtained wetting angles are used for the determination of the surface free energy γS (γ), as well as its polar , dispersive Owens–Wendt , Lifshits–van der Waals γLW, and acid-base γAB components, by applying the Lifshits–van der Waals/acid-base methods.

Exciton Transport and Destruction - Stabilization Processes in Styrene-Based Polymers

Abstract Some variants of using the excitation energy transfer for the stabilization of polymers are examined. Intramolecular photostabilizers acting due to exciton trapping are proposed.

Some functional macromolecules as exciton converters

The hypothetical structures of macromolecules with direct one-way excitonic conductivity have been examined. The dependence of excitonic current value on number of polymers cell has been obtained for macromolecules of optimal energetical structure. Some compounds with direct exciton conductivity were designed and synthesized. Such compounds may be used as exciton convectors in nanoelectronics.

Optical and photochemical properties of diarylethylenes

In this study, the 2-(4-methacryloxystyryl)quinoline, 2-(4-methacryloxystyryl)-6-methoxyquinoline were synthesized. The polymers built from the free radical polymerization of methacrylic monomers incorporating the diarylethylenes sidegroup have been synthesized in dimethylformamide with azobisisobutyronitrile as initiator. The products of polymerization were characterized and evaluated by 1HNMR, UV spectroscopy. Thermal stability was characterized by DSC method. Their optical and photochemical properties as well as temperature dependence of the photoluminescence of diarylethylenes have been investigated.

Block Copolymers of Methoxypoly(Ethylene Oxide) and Poly(ϵ-Caprolactone): Synthesis, Structure, Micellization, and Interaction with Prednisolon

A series of MOPEO-b-PCL diblock copolymers (DBCs) with M nMOPEO = 2.5 · 103 and M nPCL = (0.28 ÷ 2.43) · 104 was synthesized using the anionic ring-opening block copolymerization. A bulk structure of the copolymers was studied with DSC. One glass transition and three melting peaks for MOPEO-b-PCL were found, thus implying the existence of separate crystalline domains of both blocks in a copolymer structure. The intense micellization of DBCs in dioxane/aqueous solutions was found with a spectrophotometry, a static light scattering, and photography. A reduction in CMC and an increase in −ΔG° values with growth of the PCL length and at the addition of prednisolon (PS) were established. The hydrogen bonding of PS with DBCs was confirmed with FTIR spectroscopy.

Introducing sulfonamides moiety on the polyethylene films surface

Surface photomodification of polyethylene (PE) films by using new azidobenzenesulfonamides was carried out. The wetting angles for three liquids of different polarity (water, formamide and diiodomethane) have been studied to estimate the surface modification performed. The received values of wetting angles for determining the surface free energy γS (γ) by the Owens-Wendt and Lifshitz-van der Waals γLW, acid-base γAB by the Lifshitz-van der Waals/acid-base methods.

Photochemistry and Photophysics in Phenyloxazolones

The semi-empirical calculations carried out according with the theory of the PM3/CI level has shown, that at an irradiating of their solutions by UV-light give no possibilities of the photo-Fries reaction. The calculated values are in a good accordance with the experimental ones.

Polymers with benzylidene fragment for nonlinear optical application

Oxazalone and thiohydantoin derivatives were synthesized and their physicochemical properties are determined by absorption, fluorescence, fluorescence excitation and HNMR spectroscopies. The polymerization was carried out in DMF with AIBN as initiator. The products of polymerization were characterized by HNMR. The third order nonlinear optical properties of oxazolone and thiohydantoin containing compounds have been investigated in solutions using degenerate four wave mixing (DFWM) method at 532 nm.