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6 results on '"A. A. Bulakov"'

1. Correction: Mallphanov et al. Novel Approach to Increasing the Amplitude of the Mechanical Oscillations of Self-Oscillating Gels: Introduction of Catalysts Both as Pendant Groups and as Crosslinkers. Gels 2024, 10, 727

Author

Ilya L. Mallphanov, Michail Y. Eroshik, Dmitry A. Safonov, Alexander V. Sychev, Vyacheslav E. Bulakov, and Anastasia I. Lavrova

Subjects
n/a, Science, Chemistry, QD1-999, Inorganic chemistry, QD146-197, General. Including alchemy, QD1-65
Abstract

In the original publication [...]

Published
2024
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2. Novel Approach to Increasing the Amplitude of the Mechanical Oscillations of Self-Oscillating Gels: Introduction of Catalysts Both as Pendant Groups and as Crosslinkers

Author

Ilya L. Mallphanov, Michail Y. Eroshik, Dmitry A. Safonov, Alexander V. Sychev, Vyacheslav E. Bulakov, and Anastasia I. Lavrova

Subjects
ruthenium complexes, iron complexes, polymers, self-oscillating gels, Belousov–Zhabotinsky reaction, Science, Chemistry, QD1-999, Inorganic chemistry, QD146-197, General. Including alchemy, QD1-65
Abstract

For the first time, we introduced chemomechanical self-oscillating poly(N-isopropylacrylamide)-based gels containing catalytically active Fe or Ru complexes both as crosslinkers and as pendant groups. All the obtained gels exhibited sustained autonomous oscillations driven by the Belousov–Zhabotinsky reaction within their structure. The Ru complex-based gels also demonstrated pronounced chemomechanical oscillations; they periodically swelled/shrunk when the catalyst was reduced/oxidized. It was found that the combination of catalytically active cross-linking and pendant Ru complexes in the same gel led to a change in the structure of the gel and a significant increase in the amplitude of its mechanical oscillations. The proposed approach allowed for increasing the amplitude of the mechanical oscillations of self-oscillating gels and opened up new possibilities for adjusting their characteristics. We believe that these gels hold potential for the development of soft actuators and systems capable of signal processing through propagating and interacting chemical waves.

Published
2024
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3. Association of heterogeneous dye molecules in microheterogeneous polymer micellar solutions

Author

O. S. Ivanova, D. V. Bulakov, and Alexander M. Saletsky

Subjects
chemistry.chemical_classification, Aqueous solution, Absorption spectroscopy, Polyacrylic acid, technology, industry, and agriculture, Polymer, Condensed Matter Physics, Photochemistry, Polyelectrolyte, chemistry.chemical_compound, chemistry, Homogeneous, Micellar solutions, Molecule, lipids (amino acids, peptides, and proteins), Spectroscopy
Abstract

Absorption spectra of a mixture of organic dyes in aqueous and micellar solutions of polyacrylic acid were investigated. Association processes in these microheterogeneous systems were studied. The degrees of homogeneous and heterogeneous association of dye mixtures were determined as functions of the polyelectrolyte concentration and its polyionic chain length and the influence on them of the polymer micellar complex structure.

Published
2013
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4. Processes of electronic excitation energy transfer between luminescent dye molecules in microheterogeneous systems based on polymer micellar solutions

Author

D. V. Bulakov and A. M. Saletskiĭ

Subjects
chemistry.chemical_classification, Quantitative Biology::Biomolecules, Materials science, Polymer, Fractal dimension, Atomic and Molecular Physics, and Optics, Polyelectrolyte, Electronic, Optical and Magnetic Materials, Condensed Matter::Soft Condensed Matter, Fractal, chemistry, Chemical physics, Micellar solutions, Molecule, Physics::Chemical Physics, Luminescence, Excitation
Abstract

The processes of electronic excitation energy transfer (EEET) between different-type dye molecules in polymer micellar solutions with different polyelectrolyte concentration have been analyzed. The possibility of regulating the EEET efficiency between dye molecules due to change of the structure of polymer micellar complexes has been established. The results presented are explained from the viewpoint of the fractal character of distribution of interacting particles. The experimental dependence of the fractal dimension of the distribution of dye molecules in polymer micellar solutions on the polyelectrolyte concentration has been obtained.

Published
2008
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5. Dimerization of molecules of methylene blue in microstructured polymer-micelle solutions

Author

A. M. Saletskii and D. V. Bulakov

Subjects
chemistry.chemical_classification, chemistry.chemical_compound, chemistry, Dimer, Organic dye, Molecule, Polymer, Condensed Matter Physics, Photochemistry, Micelle, Spectroscopy, Polyelectrolyte, Methylene blue
Abstract

We used spectroscopic methods to study association processes of methylene blue molecules in polymer-micelle solutions. We determined the efficiency of dimer formation of dye molecules and their structure as a function of the polymer-micelle complex composition.

Published
2007
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6. The study of structure and photophysical processes of polyelectrolyte-surfactant-dye molecules complex by laser spectroscopy

Author

D V Bulakov and Alexander M. Saletsky

Subjects
Materials science, Physics and Astronomy (miscellaneous), Eosin, Photochemistry, Fluorescence, Polyelectrolyte, chemistry.chemical_compound, Polymerization, chemistry, Molecule, Fluorescence cross-correlation spectroscopy, Spectroscopy, Instrumentation, Two-dimensional nuclear magnetic resonance spectroscopy
Abstract

Using laser correlation spectroscopy, we have investigated the structure of polyelectrolyte-micelle complex. The influence of polymerization degree and concentration of polyelectrolyte on complex-sizing distribution has been established. Eosin has been used as a fluorescence probe in micellar solution of polyelectrolyte. We showed the differences in values of lifetime and association degree with difference of solution structure.

Published
2007
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