Výsledky vyhledávání - "Ya. R. Tymyanskii"

Luminescence-spectral characteristics and structure of 1-hydroxyphenyl-substituted 2,4,6-triphenylpyridinium perchlorates

Autor: M. I. Knyazhanskii, Ya. R. Tymyanskii, L. O. Atovmyan, Oleg A. Dyachenko, G. N. Dorofeenko, S. M. Aldoshin

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 30:1864-1872

1. A significant difference was found in the luminescence characteristics of 1-(2-hydroxyphenyl)- and 1-(4-hydroxyphenyl)-2,4,6-triphenylpyridinium perchlorates at various temperatures. At 293°K the luminescence of both compounds in the crystalline

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e7229536ef90333b9257b16c49805526
https://doi.org/10.1007/bf00963410

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Intramolecular energy transfer in several azomethines of the pyridinium series

Autor: Ya. R. Tymyanskii, G. N. Dorofeenko, Yu. P. Andreichikov, M. I. Knyazhanskii, G. E. Trukhan

Publikováno v: Journal of Applied Spectroscopy. 25:1015-1018

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c36e102010072e393f47a1ce67f3072c
https://doi.org/10.1007/bf00624297

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Synthesis and spectral properties of furyl-substituted pyridines and pyrylium and pyridinium salts

Autor: V. N. Novikov, Ya. R. Tymyanskii, V. M. Feigel'man, M. I. Knyazhanskii

Publikováno v: Chemistry of Heterocyclic Compounds. 24:1091-1094

2,6-Diphenyl-4-(5-R-2-furyl) pyrylium and 2,4-diphenyl-6-(5-bromo-2-furyl) pyrylium perchlorates and the corresponding pyridines and 1-methylpyridinium perchlorates were synthesized. On the basis of the UV and PMR spectra it was concluded that there

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8e1f4e38f669989b43652051d74ff9d6
https://doi.org/10.1007/bf00475680

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Photocyclization of 1,2-diaryl- and photobicyclization of 1,2,6-triarylpyridinium cations

Autor: Ya. R. Tymyanskii, E. Lunt, Bushra J. Agha, M. I. Knyazhanskii, A. I. Pyshchev, Alan R. Katritzky, G. Z. de Ville

Publikováno v: Chemistry of Heterocyclic Compounds. 20:1245-1254

New 1,2-diaryl- and 1,2,6-triarylpyridinium salts, containing various five- and six-membered heteroaromatic substituents in the 1, 2, and 6-positions of the pyridinium ring, were synthesized. New tetra- and hexacyclic compounds were prepared by photo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::28af3274266cb26af5317b82d4d76f86
https://doi.org/10.1007/bf00505716

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Photomonocyclization of 1,2,6-triarylpyridinium cations

Autor: L. O. Atovmyan, Ya. R. Tymyanskii, A. I. Pyshchev, Oleg A. Dyachenko, M. I. Knyazhanskii, S. M. Aldoshin

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 31:478-482

It was found by UV spectroscopy and x-ray diffraction analysis that the photocyclization of 1-(3'-halophenyl)-2,4,6-triphenylpyridiniurn cations leads to stable 1,3-diphenyl-11-chloro(bromo)-azoniatriphenylene cations.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b6de062e462f4d6eda78525633da3d1f
https://doi.org/10.1007/bf00949764

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Condensed heterocyclic systems with a quaternary nitrogen atom

Autor: G. N. Dorofeenko, M. I. Knyazhanskii, Yu. P. Andreichikov, Ya. R. Tymyanskii, G. E. Trukhan

Publikováno v: Chemistry of Heterocyclic Compounds. 14:990-993

Nitro and amino derivatives of pyrido[1,2-f]phenanthridinium perchlorate were synthesized by the Pschorr method and by photocyclodehydrogenation from N-(nitrophenyl)-or N-(aminophenyl)pyridinium perchlorates. The mechanism of the photoconversion was

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e4274a8b0c572be8db6da1fdb07df5a9
https://doi.org/10.1007/bf00509557

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Molecular-structural aspects of formulation of spectral-luminescence properties of aryl-substituted pyridinium cations

Autor: V. M. Feigel'man, Ya. R. Tymyanskii, M. I. Knyazhanskii, V. A. Kharlanov

Publikováno v: Journal of Applied Spectroscopy. 42:394-398

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f3ec205d9ccdaba467c25bae207644c3
https://doi.org/10.1007/bf00662500

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Fluorescence and photocycl1zation of N-naphthyl-substituted pyridinium cations

Autor: M. I. Knyazhanskii, V. M. Feingel'man, N. V. Kholodova, Ya. R. Tymyanskii

Publikováno v: Chemistry of Heterocyclic Compounds. 20:1262-1266

The spectral-fluorescent and photochemical properties of 1-naphthyl-2,4-di- and 2,4,6-triphenylpyridinium perchlorates were investigated in solutions at 293 and 77 °K. The anomalously large Stokes shift of the fluorescence was due to the adiabatic c

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https://doi.org/10.1007/bf00505719

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Optical and photochemical properties of N-benzalaminophenylpyridinium perchlorates

Autor: M. I. Knyazhanskii, G. E. Trukhan, Yu. P. Andreichikov, G. N. Dorofeenko, Ya. R. Tymyanskii

Publikováno v: Chemistry of Heterocyclic Compounds. 10:696-698

The electronic spectra of a number of benzylidene derivatives of N-aminoarylpyridinium perchlorates are associated with absorption localized on the individual pyridinium and azomethine fragments and with intramolecular charge transfer (ICT) from the

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https://doi.org/10.1007/bf00480928

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