Центральная Научная Библиотека УрО РАН

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Kozhevnikov D. N., Kozhevnikov V. N., Ustinova M. M., Santoro A., Bruce D.W., Koenig B., Fisher T., Zabel M., Yersin H.
Заглавие : Synthesis of cyclometallated platinum complexes with substituted thienylpyridines and detailed characterization of their luminescence properties
Место публикации : Inorganic Chemistry . - 2009. - Vol. 48, № 9. - С. 4179-4189
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Synthesis of various derivatives of 2-(2-thienyl)pyridine via substituted 3-thienyl-1,2,4-triazines is reported. The final step of the synthesis is a transformation of the triazine ring to pyridine in an aza-Diels-Alder-type reaction. The resulting 5-aryl-2-(2-thienyl)pyridines (HL1-HL4) and 5-aryl-2-(2-thienyl)cyclopenteno[c]pyridines (HL5-HL8) (with aryl = phenyl, 4-methoxyphenyl, 2-naphtyl, and 2-thienyl) were used as cyclometallating ligands to prepare a series of eight luminescent platinum complexes of the type [Pt(L)(acac)] (L = cyclometallating ligand, acac = acetylacetonato). X-ray single crystal structures of three complexes of that series, [Pt(L5)(acac)] = [Pt(5-phenyl- 2-(2-thienyl)cyclopenteno[c]pyridine)(acac)], [Pt(L6)(acac)] = [Pt(5-(4-methoxy)-2-(2-thienyl)cyclopenteno[c]py- ridine)(acac)], and [Pt(L7)(acac)] = [Pt(5-(2-naphtyl)-2-(2-thienyl) cyclopenteno[c]pyridine)(acac)] were determined. Photoluminescence and electronic absorption spectra of the new [Pt(L)(acac)] complexes are reported. For two representative compounds of that series, [Pt(L4)(acac)] and [Pt(L5)(acac)], a detailed photophysical characterization based on highly resolved emission and excitation spectra, as well as on emission decay properties, was carried out. The studies down to low temperature (T = 1.2 K) and up to high magnetic fields (6 = 10 T) allowed us to characterize the three individual substates of the emitting triplet state. In particular, it is shown that the lowest triplet states of [Pt(L4)(acac)] and [Pt(L5)(acac)] are largely ligand-centered (LC) of3jtjt*character, which experience only weak spin- orbit couplings to higher lying singlet states
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Вид документа : Статья из журнала
Шифр издания : 54/P 93
Автор(ы) : Skorik Yu.A., Neudachina L.K., Osintsev A. V., Yatluk Yu. G., Vshivkov A.A., Osintseva E. V.
Заглавие : Protolytic Equilibria of Some N,N-Bis(2-carboxyethyl)aminoazobenzenesulfonic Acids in Aqueous Solution [Electronic resource]
Место публикации : Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2002. - Vol. 38, № 3. - С. 385-389
Систем. требования: http://www.springerlink.com/content/wxn0h9dv5rua3xcv/fulltext.pdf
Примечания : 28.10.2011 г.
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 4-[4-Bis(2-carboxyethyl)aminophenylazo]benzenesulfonic acid and 4-[2-bis(2-carboxyethyl)amino-4,5-dimethylphenylazo]benzenesulfonic acid were synthesized for the first time by azo coupling of diazosulfanilic acid with N,N-bis(2-carboxyethyl)aniline and N,N-bis(2-carboxyethyl)-3,4-xylidine, respectively. The acid ionization constants of the products were determined, their electron absorption spectra were measured, and schemes of acid-base equilibria in aqueous solution were proposed
\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2002, 38 (3), 385.pdf
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Вид документа : Статья из журнала
Шифр издания : 54/O-84
Автор(ы) : Osintseva E. V., Neudachina L.K., Yatluk Yu. G.
Заглавие : Protolytic properties and complexation with copper(II) ions of some azo derivatives of beta-arylaminopropionic acids [Electronic resource]
Место публикации : Russian Journal of Inorganic Chemistry (Zhurnal Neorganicheskoi Khimii). - 2010. - Vol. 55, № 10. - С. 1644-1650
Систем. требования: http://www.springerlink.com/content/g6008n2620507854/fulltext.pdf
Примечания : 17.10.2011
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The azo coupling reaction of N-(2-carboxyethyl)anthranilic acid and N,N,N,N-tetrabis(2-carboxyethyl)-1,3-phenylenediamine with diazosulfanilic acid yielded the complexones sodium 4-N-(2-carboxyethyl)amino-5-carboxyazobenzene-4?-sulfonate (I) and 2,4-N,N,N,N-tetrabis(2-carboxyethyl)diaminoazobenzene-4?-sulfonic acid (II), respectively. The acidity constants of I and II (20°C = 0.1M KCl) were determined to be as follows: for I, pK 00 = 1.29 ± 0.13, pK 0 = 2.92 ± 0.07, pK 1 = 3.92 ± 0.05, pK 2 = 5.16 ± 0.03; for II, pK 00 = 2.35 ± 0.06, pK 0 = 2.81 ± 0.09, pK 1 = 3.21 ± 0.11, pK 2 = 3.81 ± 0.09, pK 3 = 4.34 ± 0.04, pK 4 = 5.03 ± 0.06, pK 5 = 6.67 ± 0.07. The electronic absorption spectra of I and II were measured, and acid-base equilibrium scheme for I and II in aqueous solutions were suggested. The complexation constants of I and II with copper(II) ions were determined to be logK CuQI= 5.47 ± 0.06 and logK CuQII= 5.72 ± 0.13 (20°C = 0.1 M KCl). ??
\\\\Expert2\\nbo\\Russian Journal of Inorganic Chemistry\\2010, v. 55, N 10, с.1644.pdf
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Вид документа : Статья из журнала
Шифр издания : 54/U 67
Автор(ы) : Leonidov I.I., Zubkov V.G., Tyutyunnik A. P., Tarakina N. V., Surat L. L., Koryakova O. V., Vovkotrub E. G.
Заглавие : Upconversion luminescence in Er3+/Yb3+ codoped Y2CaGe4O12 [Electronic resource]
Место публикации : Journal of Alloys and Compounds. - 2011. - Vol. 509, № 5. - С. 1339-1346
Систем. требования: http://www.sciencedirect.com/science/article/pii/S0925838810025600
Примечания : Bibliogr. : p. 1345-1346 (52 ref.) . - 13.10.2011
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Calcium yttrium tetrametagermanates Y2CaGe4O12 doped with Er3+ and Er3+/Yb3+ reveal upconversion emission in visible spectral range under near-infrared excitation, ex = 980 nm. For the solid solution ErxY2?xCaGe4O12 concentration dependencies for the green and red lines of the visible emission around 526 nm (2H11/2 4I15/2), 545 nm (4S3/2 4I15/2) and 670 nm (4F9/2 4I15/2) show the optimal value for the sample x = 0.2. The power dependence of the visible luminescence measured at room temperature in the low-power limit indicates two-photon upconversion process. Direct intensification of the upconversion emission signals has been achieved by ytterbium sensitizing. The other upconversion excitation mechanism in Y2CaGe4O12:Er3+ is discussed for an 808 nm incident laser irradiation. A scheme of excitation and emission routes involving ground/excited state absorption, energy transfer upconversion, nonradiative multiphonon relaxation processes in trivalent lanthanide ions in Y2CaGe4O12:Er3+ and Y2CaGe4O12:Er3+, Yb3+ has been proposed. Conditions for visible emission occurrence under quasi-resonance ex = 1064 nm excitation depending on pump power values are considered. In the low-power regime only near-infrared emission caused by the transition 4I13/2 4I15/2 in erbium ions has been detected
\\\\Expert2\\nbo\\Journal of Alloys and Compounds\\2011, v.509, N 5, p.1339.pdf
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Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Fedoseev M. S., Derzhavinskaya L. F., Karmanov V. I., Bazhin D. N., Zapevalov A. Ya., Gorbunova T. I., Saloutin V. I.
Заглавие : Synthesis and properties of epoxy-anhydride polymers modified with polyfluorolakyl-substituted oxiranes in the course of curing [Electronic resource]
Место публикации : Russian Journal of Applied Chemistry. - 2010. - Vol. 83, № 4. - С. 723-727: табл., граф.
Систем. требования: http://www.springerlink.com/content/m536p87v2xl2k24l/fulltext.pdf
Примечания : Bibliogr. : p. 723-727 (24 ref.). - 19.10.2011
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Epoxy-anhydride polymers based on N,N,O-triglycidyl-p-aminophenol and isomethyltetrahydrophthalic anhydride were synthesized in the presence of new active modifiers, polyfluoroalkyl glycidyl ethers. The kinetics of the reactions of the modifiers with the anhydride were studied by differential scanning calorimetry and IR spectroscopy. The physicomechanical characteristics, glass transition points, and water absorption of the polymers were determined.
\\\\Expert2\\nbo\\Russian Journal of Applied Chemistry\\2010, v. 83, N 4, p.723-727.pdf
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Вид документа : Статья из журнала
Шифр издания : 54/N 10
Автор(ы) : Bratskaya S.YU., Azarova Yu. A., Matochkina E. G., Kodess M. I., Yatluk Yu. G., Pestov A. V.
Заглавие : N-(2-(2-pyridyl)ethyl)chitosan: synthesis, characterization and sorption properties
Место публикации : Carbohydrate Polymers. - 2011. - In Press, Accepted Manuscript, Availabe online 31 Augist 2011
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The method of producing N-2-(2-pyridyl)ethylchitosan (PE-chitosan) with substitution degrees (DS) up to 1.2 has been developed using the “synthesis in gel” approach for direct addition reaction between 2-vynilpyridine and chitosan. Investigation of sorption properties has revealed significantly higher affinity of pyridylethyl fragments to Pt(IV)) and Pd(II) ions compared to the unsubstituted amino groups of chitosan. The maximum sorption capacities of PE-chitosan in 0.1 M HCl solution were estimated as 5.56 mmol/g for Au(III), 3.67 mmol/g for Pd(II), and 2.75 mmol/g for Pt(IV). Sorption capacities of PE-chitosan for transition metal ions at pH 4-8 were 1.5-2.6 higher than those of chitosan with the highest values attained for Cu(II) and Ag(I) ions–1.50 mmol/g and 1.53 mmol/g, respectively. The PE-chitosan application for preconcentration of Au(III) with subsequent elution with HCl/thiourea mixtures was proved to be efficient for atomic absorption spectroscopy analysis of multi-component solutions with low gold content
\\\\Expert2\\nbo\\Carbohydrate Polymers\\2011, Article inPress, 31 August.pdf
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Вид документа : Статья из журнала
Шифр издания : 54/S 90
Автор(ы) : Shkvarin A. S., Yarmoshenko Yu. M., Skorikov N. A., Merentsov A. I., Titov A. N., Slepukhin P. A., Marchenko D. E., Sperling M.
Заглавие : Studying the electronic structure of Cr (x) Ti(1-x) Se(2) by X-ray resonance and absorption spectroscopy
Место публикации : Journal of experimental and theoretical physics. - 2011. - Vol. 112, № 1. - С. 87-93
Примечания : Bibliogr. : p. 93 (19 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Cr (x) Ti(1 - x) Se(2) (x = 0-0.83) solid solutions have been synthesized. Single crystals have been grown in the range of concentrations x = 0-0.83. Structural studies of samples have revealed that chromium atoms substitute titanium in the TiSe(2) matrix. The X-ray photoelectron spectra of the core levels, the resonance spectra of the valence bands in 1T-Cr (x) Ti(1 - x) Se(2), and the X-ray absorption spectra of titanium and chromium are studied. The titanium and chromium atoms are shown to have oxidation numbers of +4 and +3, respectively, in an identical octahedral environment. The local density of chromium states has been calculated. The results of the calculation agree well with the experimental data and indicate that the electronic 3d states of chromium substituting titanium in the matrix are spin-polarized and the density of chromium states is halfmetal magnet in behavior
\\\\Expert2\\nbo\\Journal of Experimental and Theoretical Physics\\2011, v.112, N 1, P. 87.pdf
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Вид документа : Статья из журнала
Шифр издания : 54
Автор(ы) : Prokhorov A. M., Slepukhin P. A., Rusinov V. L., Kalinin V. N., Kozhevnikov D. N.
Заглавие : 2,2 '-Bipyridinyl carboranes as B,N,N-ligands in cyclometallated complexes of platinum(II) [Электронный ресурс]
Место публикации : Chemical Communications. - 2011. - Vol. 47, № 27. - С. 7713-7715
Систем. требования: http://www.springerlink.com/journals/
Примечания : Электрон. версия печ. публикации
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Novel B,N,N-cyclometallated Pt(II) complexes of 2,2'-bipyridin-6-yl carboranes exhibit absorption and emission similar to relative Pt(II) complexes of aromatic C,N,N-ligands: the same transitions but lower intensities. DFT calculations suggest the former emits from the (3)MLCT state while for the latter the mixed (3)ICT-MLCT transitions should be considered
\\\\expert2\\NBO\\Chemical Communications\\2011,v.47. p.7713.pdf
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Вид документа : Статья из журнала
Шифр издания : 54/P 58
Автор(ы) : Kozhevnikov D. N., Kozhevnikov V. N., Shafikov M. Z., Prokhorov A. M., Bruce D.W., J. A. Gareth Williams
Заглавие : Phosphorescence vs Fluorescence in Cyclometalated Platinum(II) and Iridium(III) Complexes of (Oligo)thienylpyridines
Место публикации : Inorganic Chemistry . - 2011. - Vol. 50, № 8. - С. 3804-3815
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): oligothienylpyridines--ligands--luminescence properties
Аннотация: Two newly prepared oligothienylpyridines, 5-(2-pyridyl)-5?-dodecyl-2,2?-bithiophene, HL2, and 5-(2-pyridyl)-5??-dodecyl-2,2?:5?,2??-ter-thiophene, HL3, bind to platinum(II) and iridium(III) as NC-coordinating ligands, cyclometallating at position C4 in the thiophene ring adjacent to the pyridine, leaving a chain of either one or two pendent thiophenes. The synthesis of complexes of the form [PtLn(acac)] and [Ir(Ln)2(acac)] (n = 2 or 3) is described. The absorption and luminescence properties of these four new complexes are compared with the behavior of the known complexes [PtL1(acac)] and [Ir(L1)2(acac)] {HL1 = 2-(2-thienyl)pyridine}, and the profound differences in behavior are interpreted with the aid of time-dependent density functional theory (TD-DFT) calculations. Whereas [PtL1(acac)] displays solely intense phosphorescence from a triplet state of mixed ??*/MLCT character, the phosphorescence of [PtL2(acac)] and [PtL3(acac)] is weak, strongly red shifted, and accompanied by higher-energy fluorescence. TD-DFT reveals that this difference is probably due to the metal character in the lowest-energy excited states being strongly attenuated upon introduction of the additional thienyl rings, such that the spin?orbit coupling effect of the metal in promoting intersystem crossing is reduced. A similar pattern of behavior is observed for the iridium complexes, except that the changeover to dual emission is delayed to the terthiophene complex [Ir(L3)2(acac)], reflecting the higher degree of metal character in the frontier orbitals of the iridium complexes than their platinum counterparts.??
\\\\Expert2\\nbo\\Inorganic Chemistry\\2011, v.50, p.3804.pdf
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10.

Вид документа : Статья из журнала
Шифр издания : 54/N 10
Автор(ы) : Bratskaya S.YU., Azarova Yu. A., Matochkina E. G., Kodess M. I., Yatluk Yu. G., Pestov A. V.
Заглавие : N-(2-(2-pyridyl)ethyl)chitosan: Synthesis, characterization and sorption properties
Место публикации : Carbohydrate Polymers. - 2012. - Vol. 87, № 1. - С. 869-875
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): chitosan n-heterocyclic derivatives--selective adsorption--pyridine derivatives
Аннотация: The method of producing N-2-(2-pyridyl)ethylchitosan (PE-chitosan) with substitution degrees (DS) up to 1.2 has been developed using the "synthesis in gel" approach for direct addition reaction between 2-vynilpyridine and chitosan. Investigation of sorption properties has revealed significantly higher affinity of pyridylethyl fragments to Pt(IV)) and Pd(II) ions compared to the unsubstituted amino groups of chitosan. The maximum sorption capacities of PE-chitosan in 0.1 M HCl solution were estimated as 5.56 mmol/g for Au(III), 3.67 mmol/g for Pd(II), and 2.75 mmol/g for Pt(IV). Sorption capacities of PE-chitosan for transition metal ions at pH 4-8 were 1.5-2.6 higher than those of chitosan with the highest values attained for Cu(II) and Ag(I) ions - 1.50 mmol/g and 1.53 mmol/g, respectively. The PE-chitosan application for preconcentration of Au(III) with subsequent elution with HCl/thiourea mixtures was proved to be efficient for atomic absorption spectroscopy analysis of multi-component solutions with low gold content
\\\\Expert2\\nbo\\Carbohydrate Polymers\\2012, v. 87, p.869.pdf
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11.

Вид документа :
Шифр издания : 54/S 89
Автор(ы) : Khamidullina L. A., Puzyrev I. S., Pestov A. V., Moshkin V. S., Yatluk Yu. G.
Заглавие : Structure and absorption spectra of substituted 2-hydroxy-2-trifluoromethylchroman-4-ones
Место публикации : Journal of Applied Spectroscopy. - 2012. - Vol.79, №4. - С. 509-514
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): absorption spectra--extinction coefficient--medium acidity
Аннотация: UV absorption spectra of substituted 2-hydroxy-2-trifluoromethylchroman-4-ones (chromanones) in aqueous ethyleneglycol were studied. Replacement of hydrogen in the aromatic ring of the chromanones by CH3 or CF3 groups was shown to cause the molar extinction coefficients of the K, B, and C=O bands to shift from 16,160 to 27,980 and 30,250 dm(3)/mol center dot cm; from 12,750 to 17,920 and 16,130 dm(3)/mol center dot cm; and from 3850 to 3630 and 2760 dm(3)/mol center dot cm, respectively. Increasing the solution pH from 1 to 10.5 affected weakly the aromatic ring bands yet impacted greatly the chromanone carbonyl bands, causing their lambda(max) to shift from 311-326 nm to 342-346 nm and their extinction coefficients to increase from 2760-3850 dm(3)/mol center dot cm to 9940-10,160 dm(3)/mol center dot cm. A further rise in the pH resulted in hypochromia of the carbonyl band due to the destruction of the chromanones. The results were confirmed by NMR spectroscopy and GC methods
\\\\Expert2\\nbo\\Journal of Applied Spectroscopy\\2012, v. 90, p.1176.pdf
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12.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Verbitskiy E. V., Cheprakova E. M., Subbotina J.O., Schepochkin A. V., Slepukhin P. A., Rusinov G. L., Charushin V. N., Chupakhin O. N., Makarova N. I., Metelitsa A. V., Minkin V. I.
Заглавие : Synthesis, spectral and electrochemical properties of pyrimidine-containing dyes as photosensitizers for dye-sensitized solar cells
Место публикации : Dyes and Pigments. - 2014. - Vol.100. - С. 201-214
Примечания : Bibliogr. : p. 213-214 (37 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): organic dyes --pyrimidine--microwave-assisted
Аннотация: Six novel donor–π–acceptor organic dyes bearing a pyrimidine as the anchoring group have been obtained in good yields by combination of the microwave-assisted Suzuki cross-coupling and nucleophilic aromatic substitution of hydrogen reactions. Their absorption, photoluminescence and electrochemical properties were fully investigated in detail. The infrared spectra of dyes adsorbed on TiO2 indicate the formation of coordinate bonds between the pyrimidine ring of dyes and the Lewis acid sites (exposed Tin+ cations) of the TiO2 surface. This work demonstrates that the pyrimidine rings of dye sensitizers that form a coordinate bond with the Lewis acid site of a TiO2 surface are promising candidates as the electron-withdrawing anchoring group. The data from quantum calculations show that all of the dyes are potentially good photosensitizers for dye-sensitized solar cells
\\\\expert2\\NBO\\Dyes and Pigments\\2014, v. 100, p.201-214.pdf
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13.

Вид документа : Статья из журнала
Шифр издания : 54/F 97
Автор(ы) : Sokolov V. I., Druzhinin A. V., Kim D.G., Gruzdev N. B., Yermakov A.Ye., Uimin M. A., Byzov I. V., Shchegoleva N. N., Vykhodets V. B., Kurennykh T. E.
Заглавие : Fundamental absorption edge of NiO nanocrystals [Электронный ресурс]
Место публикации : Physica B: Condensed Matter . - 2013. - Vol. 430. - С. 1-5
Систем. требования: http://www.sciencedirect.com/science/article/pii/S0921452613004638
Примечания : Bibliogr. : p. 5 (29 ref.). - 2.12.2014
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): transition metal oxide --optical properties--charge transfer transitions
Аннотация: NiO nanocrystals with the average size of 5, 10 and 25 nm were synthesized by gas-condensation method. The well-defined increase of the optical density D near the fundamental absorption edge of NiO nanocrystals in the range of 3.5–4.0 eV observed after the annealing in air is caused by the oxygen content growth. It is the direct experimental evidence of the fact that p—d charge transfer transitions form the fundamental absorption edge
\\\\expert2\\NBO\\Physica B\\2013, v.430, p. 1-5.pdf
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14.

Вид документа : Статья из журнала
Шифр издания : 54/D 64
Автор(ы) : Verbitskiy E. V., Slepukhin P. A., Valova M. S., Cherprakova E. M., Schepochkin A. V., Rusinov G. L., Charushin V. N.
Заглавие : Dithienoquinazolines – A Convenient Synthesis by the Oxidative Photocyclization of 4,5-Dithienyl-Substituted Pyrimidines and Their Photophysical Properties [Электронный ресурс]
Место публикации : European Journal of Organic Chemistry. - 2014. - № 36. - С. 8133-8141
Систем. требования: http://onlinelibrary.wiley.com/doi/10.1002/ejoc.v2014.36/issuetoc
Примечания : 06.07.2015
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): dithienoquinazolines--pyrimidines--photophysical properties
Аннотация: A convenient route to a new class of thienoacene systems bearing a fused pyrimidine ring is presented along with their optoelectronic properties. The photophysical and electrochemical properties of these newly developed thieno-aza-acenes have been investigated by UV/Vis absorption and photoluminescence spectrophotometry and cyclic voltammetry, and some crystal structures have also been determined.
\\\\expert2\\nbo\\European Journal of Organic Chemistry\\2014, № 36. p.8133-8141.pdf
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15.

Вид документа : Статья из журнала
Шифр издания : 54/S 89
Автор(ы) : Lipunova G. N., Nosova E. V., Subbotina J.O., Valova M. S., Charushin V. N.
Заглавие : Structure and photoluminescent properties of 2-methyl-6,7-difluoro-8-hydroxyquinoline [Электронный ресурс]
Место публикации : Russian Journal of General Chemistry. - 2015. - Vol. 85, № 7. - С. 1629-1634
Систем. требования: http://link.springer.com/article/10.1134/S1070363215070099
Примечания : Bibliogr. : p. 1634 (19 ref.). - 09.11.15
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): 2-methyl-6,7-difluoro-8-hydroxyquinoline--absorption spectrum--excitation spectrum
Аннотация: The effect of fluorine atoms in the benzene ring on the photophysical properties of 2-methyl-6,7-difluoro-8-hydroxyquinoline is studied.
\\\\expert2\\nbo\\Russian Journal of General Chemistry\\2015, V. 85, N 7, p. 1629-1634.pdf
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16.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Ovchinnikova I. G., Kim G. A., Matochkina E. G., Kodess M. I., Barykin N. V., Eltsov O. S., Nosova E. V., Rusinov G. L., Charushin V. N.
Заглавие : Synthesis, photochemical and luminescent properties of (E)-2-(2-hydroxyarylethylene)-3-phenylquinazolin-4(3H)-ones [Электронный ресурс]
Место публикации : Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2015. - Vol. 63, № 11. - С. 2467-2477
Систем. требования: http://apps.webofknowledge.com/
Примечания : Bibliogr. : p. 2477 (22 ref.). - 18.01.16
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): (e)-2-styrylquinazolin-4(3h)-ones --luminescence--ortho-hydroxystyrylquinazolinones
Аннотация: Photoinduced transformations of 2-styrylquinazolinones in solutions were studied using absorption and NMR spectroscopy methods. A possibility of control of the photochemical isomerization rate of quinazolinone 2-(hydroxyaryl)ethenyl derivatives by changing the pH of the medium was demonstrated. The bases and the solvent nature also affect the luminescence intensity of solutions of these compounds in the wavelength range of 550-650 nm. The differences in the steric organization of the ortho-hydroxystyryldiazinone system in crystals and in solutions related to the turn of the aryl group were found. Their influence on the competing processes of luminescence and photochemical transformation of the ethylene fragment were shown. The fact of reversible photo/thermal E-Z-isomerization was established for (E)-2-(2-hydroxystyryl)-3-phenylquinazolin-4(3H)-one.
\\\\expert2\\nbo\\Russian Chemical Bulletin\\2015, 63 (11), 2467-2477.pdf
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17.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Verbitskiy E. V., Schepochkin A. V., Makarova N. I., Dorogan I. V., Metelitsa A. V., Minkin V. I., Kozyukhin S., Emets V. V., Grinberg V., Chupakhin O. N., Rusinov G. L., Charushin V. N.
Заглавие : Synthesis, Photophysical and Redox Properties of the D-pi-A Type Pyrimidine Dyes Bearing the 9-Phenyl-9H-Carbazole Moiety [Электронный ресурс]
Место публикации : Journal of Fluorescence. - 2015. - Vol. 25, № 3. - С. 763-775
Систем. требования: http://apps.webofknowledge.com/
Примечания : Bibliogr. : p. 774-775 (51 ref.). - 18.01.2016
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): pyrimidines--carbazole--dye-sensitized solar cells
Аннотация: Novel donor-pi-acceptor dyes bearing the pyrimidine unit as an electron-withdrawing group have been synthesized by using combination of two processes, based on the microwave-assisted Suzuki cross-coupling reaction and nucleophilic aromatic substitution of hydrogen. Spectral properties of the obtained dyes in six aprotic solvents of various polarities have been studied by ultraviolet-visible and fluorescence spectroscopy. In contrast to the absorption spectra, fluorescence emission spectra displayed a strong dependence from their solvent polarities. The nature of the observed long wavelength maxima has been elucidated by means of quantum chemical calculations. The electrochemical properties of these dyes have been investigated by using cyclic voltammetry, while their photovoltaic performance was evaluated by a device fabrication study. The experimental and calculation data show that all of the dyes can be regarded as potentially good photosensitizers for dye-sensitized solar cells.
\\\\expert2\\nbo\\Journal of Fluorescence\\2015, v.25, p.763-775.pdf
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18.

Вид документа : Статья из журнала
Шифр издания : 54/A 67
Автор(ы) : Azarova Yu. A., Pestov A. V., Ustinov A. Yu., Bratskaya S.YU.
Заглавие : Application of chitosan and its N-heterocyclic derivatives forpreconcentration of noble metal ions and their determination usingatomic absorption spectrometry
Место публикации : Carbohydrate Polymers. - 2015. - Vol. 134. - С. 680-686
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): chitosan--n-heterocyclic derivatives--spectrometry
\\\\expert2\\NBO\\Carbohydrate Polymers\\2015, v. 134, p. 680.pdf
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19.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Irgashev R. A., Kazin N. A., Makarova N. I., Dorogan I. V., Malov V. V., Tameev A. R., Rusinov G. L., Metelitsa A. V., Minkin V. I., Charushin V. N.
Заглавие : Synthesis and properties of new π-conjugated imidazole/carbazole structures
Место публикации : Dyes and Pigments. - 2017. - Vol. 141. - С. 512-520
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): imidazoles--carbazoles--absorption spectra--photoluminescence--tddft calculations--charge mobility
Аннотация: New 3-(1H-imidazol-2-yl)-9H-carbazoles and 6,6′-di(1H-imidazol-2-yl)-9H,9′H-3,3′-bicarbazoles have been prepared, starting from 9-ethyl-9H-carbazole-3-carbaldehyde or 9,9′-diethyl-9H,9′H-[3,3′-bicarbazole]-6,6′-dicarbaldehyde through their reactions with 4-methoxyaniline or 4-fluoroaniline, benzil or 2,2′-thenil [1,2-di(thien-2,2′-yl) glyoxal] and ammonium acetate on reflux in glacial acetic acid. The obtained compounds have been shown to demonstrate an effective fluorescence in the blue spectral region, exhibiting quantum yields in the range of 0.08–0.51, depending on their molecular structure and solvent polarity. The nature of the observed absorption spectra has been elucidated by the TDDFT calculations.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Moshkina T. N., Nosova E. V., Kopotilova A. E., Lipunova G. N., Sadieva L. K., Kopchuk D. S., Slepukhin P. A., Charushin V. N., Valova M. S., Zalesny R., Osmialowski B.
Заглавие : Synthesis and photophysical studies of novel v-shaped 2,3-bis{5-aryl-2-thienyl}(dibenzo[f,h])quinoxalines
Место публикации : Asian journal of organic chemistry. - 2020. - Vol. 9, № 4. - С. 673-681
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): cross-coupling--dibenzo[f,h]quinoxaline--donor-acceptor-donor chromophores--fluorescence--sensors
Аннотация: A series of novel V-shaped luminophores containing electron-withdrawing dibenzo[f,h]quinoxaline core and arylthienyl donor fragments at positions 2 and 3 has been synthesized. The absorption spectra (UV/vis) were recorded in several solvents, whereas emission spectra were recorded in solutions and powders. The solvatochromism as well as halochromism of obtained compounds was also explored. Electronic-structure calculations using quantum-chemistry methods were performed to further analyse experimental results. All characteristics were compared with that of 2,3-bis(arylthienyl)quinoxaline counterparts. The halochromic effect studies showed that upon gradual addition of trifluoroacetic acid (TFA) to the toluene solution of diethylaminophenyl-substituted dibenzo[f,h]quinoxaline chromophore, absorption and emission changed. Observed band shifts were more distinct in the case of mentioned quinoxaline than for other derivatives. All of the (dibenzo[f,h])quinoxaline chromophores exhibited good sensitivity toward nitro-containing explosives with high Stern-Volmer constants up to 57800 M−1, these results are remarkable for such heterocyclic systems.
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