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Your search keyword '"Dmitrieva, Svetlana N."' showing total 18 results
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18 results on '"Dmitrieva, Svetlana N."'

3. Photoinduced hydrogen-bonded self-assembly of cation-capped complexes and novel photoswitchable supramolecular devices based on (aza)-18-crown-6-containing styryl dyes bearing a long N-ammonioalkyl substituent.

Author

Gromov, Sergey P., Martyanov, Timofey P., Vedernikov, Artem I., Dmitrieva, Svetlana N., Kondratuk, Dmitry V., Vorozhtsov, Artem P., and Ushakov, Evgeny N.

Subjects
CROWN ethers, HYDROGEN bonding interactions, DYES & dyeing, NUCLEAR magnetic resonance spectroscopy
Abstract

E-Isomers of styryl dyes containing a benzo-18-crown-6 ether or N-methylbenzoaza-18-crown-6 ether moiety and a benzothiazolium residue with an ammoniohexyl, ammoniopentyl, or ammoniomethylbenzyl N-substituent were synthesized. According to spectrophotometry and NMR spectroscopy data, dyes of this type are capable of self-assembly in MeCN to form dimeric complexes, which have a pseudocyclic structure owing to double intermolecular ammonium cation–crown ether interactions via hydrogen bonds; the dimerization equilibrium constants were measured. It was shown that photoinduced Z-isomers of the dyes are capable of intramolecular complex formation between the ammonium cation and the crown ether moiety; therefore, upon E→Z photoisomerization, the dimer–monomer equilibrium shifts towards the pseudocyclic monomer. Data on the relative stability of the intramolecular cation-capped complexes formed by Z-isomers were obtained. It was shown that the equilibrium constants for the Ba2+ complexation with E-isomers of the dyes are almost three orders of magnitude higher than those for that with Z-isomers, which may imply the applicability of these dyes as photoswitchable supramolecular devices. [ABSTRACT FROM AUTHOR]

Published
2023
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8. Synthesis, Structure, and Characterization of Chromo(fluoro)ionophores with Cation-Triggered Emission Based on N-Methylaza-Crown-Ether Styryl Dyes

Author

Gromov, Sergey P., Dmitrieva, Svetlana N., Vedernikov, Artem I., Kurchavov, Nikolay A., Kuz’mina, Lyudmila G., Sazonov, Sergey K., Strelenko, Yuri A., Alfimov, Michael V., Howard, Judith A. K., and Ushakov, Evgeny N.

Abstract

Novel 2-benzothiazole-, 4-pyridine-, and 2- and 4-quinoline-based styryl dyes containing an N-methylbenzoaza-15(18)-crown-5(6)-ether moiety were synthesized. A detailed electronic spectroscopy study revealed high performance of these compounds as optical molecular sensors for alkali and alkaline-earth metal cations. They were shown to considerably surpass analogous chromoionophores based on N-phenylaza-crown ethers regarding both the ionochromism and the cation-binding ability. In addition, they act as fluorescent sensors for the metal cations by demonstrating cation-triggered emission. Upon complexation with Ba2+, the fluorescence enhancement factor reaches 61. The structural features of dyes and their metal complexes were studied by NMR spectroscopy and X-ray diffraction. The high degree of macrocycle preorganization was found to be one of the factors determining the high cation-binding ability of the sensor molecules based on N-methylbenzoaza-crown ethers.

Published
2024
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9. Supramolecular Dimerization and [2 + 2] Photocycloaddition Reactions of Crown Ether Styryl Dyes Containing a Tethered Ammonium Group: Structure–Property Relationships

Author

Ushakov, Evgeny N., primary, Vedernikov, Artem I., additional, Lobova, Natalia A., additional, Dmitrieva, Svetlana N., additional, Kuz’mina, Lyudmila G., additional, Moiseeva, Anna A., additional, Howard, Judith A. K., additional, Alfimov, Michael V., additional, and Gromov, Sergey P., additional

Published
2015
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11. Synthesis, Structure, and Characterization of Chromo(fluoro)ionophores with Cation-Triggered Emission Based on N-Methylaza-Crown-Ether Styryl Dyes

Author

Gromov, Sergey P., primary, Dmitrieva, Svetlana N., additional, Vedernikov, Artem I., additional, Kurchavov, Nikolay A., additional, Kuz’mina, Lyudmila G., additional, Sazonov, Sergey K., additional, Strelenko, Yuri A., additional, Alfimov, Michael V., additional, Howard, Judith A. K., additional, and Ushakov, Evgeny N., additional

Published
2013
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12. Macrocyclic Complexes of Palladium(II) with Benzothiacrown Ethers: Synthesis, Characterization, and Structure of cis and trans Isomers

Author

Dmitrieva, Svetlana N., primary, Sidorenko, Natalia I., additional, Kurchavov, Nikolay A., additional, Vedernikov, Artem I., additional, Freidzon, Alexandra Ya., additional, Kuz’mina, Lyudmila G., additional, Buryak, Aleksei K., additional, Buslaeva, Tat’yana M., additional, Bagatur’yants, Alexander A., additional, Strelenko, Yuri A., additional, Howard, Judith A. K., additional, and Gromov, Sergey P., additional

Published
2011
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14. N -Methylbenzoazacrown ethers with the nitrogen atom conjugated with the benzene ring: the improved synthesis and the reasons for the high stability of complexes with metal and ammonium cations

Author

Gromov, Sergey P., primary, Dmitrieva, Svetlana N., additional, Vedernikov, Artem I., additional, Kurchavov, Nikolay A., additional, Kuz'mina, Lyudmila G., additional, Strelenko, Yuri A., additional, Alfimov, Michael V., additional, and Howard, Judith A. K., additional

Published
2009
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