Главная Новые поступления Описание Шлюз Z39.50

Базы данных


Труды сотрудников Института органического синтеза УрО РАН - результаты поиска

Вид поиска

Область поиска
в найденном
 Найдено в других БД:Каталог книг и продолжающихся изданий (3)Публикации Черешнева В.А. (1)Публикации Чарушина В.Н. (20)
Формат представления найденных документов:
полныйинформационныйкраткий
Отсортировать найденные документы по:
авторузаглавиюгоду изданиятипу документа
Поисковый запрос: (<.>K=LIGANDS<.>)
Общее количество найденных документов : 75
Показаны документы с 1 по 20
 1-20    21-40   41-60   61-75 
1.
Инвентарный номер: нет.
   


   
    Boron(III) Complexes with N,​N'- and N,​O-​Heterocyclic Ligands: Synthesis and Spectroscopic Properties [Electronic resource] / G. N. Lipunova, E. V. Nosova, V. N. Charushin, O. N. Chupakhin // Comments on Inorganic Chemistry. - 2016. - Vol. 2016. - С. 1153470
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
PROPERTIES -- PREPARATION -- SYNTHETIC PREPARATION
Аннотация: This review is focused on consideration of effects of the nature of N,​N'- and N,​O-​bidentate ligands on the structure and optical properties of their B(III) complexes. It has been established that B(III) complexes with asym. N,​N'- and N,​O-​bidentate ligands, such as ortho-​hydroxyphenyl substituted azaheterocycles and heteryl-​β-​ketoimines, exhibit large Stokes shifts, enhanced intensity, and extended range for luminescence in solns. as well as in solid state, comparable with characteristics of the family of BODIPYs derivs. Complexes of some bidentate ligands can be considered as promising fluorophores for applications in biomedical imaging, electroluminescent, solar cell devices, and other fields.

\\\\expert2\\nbo\\Comments on Inorganic Chemistry\\2016. P. 1153470.pdf
Найти похожие

2.
Инвентарный номер: нет.
   


   
    1,2,4-Triazine method of bipyridine ligand synthesis for the preparation of new luminescent Eu(III) complexes [Text] / A. M. Prokhorov, V. N. Kozhevnikov, D. S. Kopchuk, D. N. Kozhevnikov // Tetrahedron. - 2011. - Vol. 67, № 3. - P597-607
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The ‘triazine’ methodology for the synthesis of functionalised bipyridine ligands proved to be a convenient method for the preparation of luminescent Eu(III) complexes. The approach allows flexible construction of chromophore and coordination sphere with control of photophysical properties. Europium (III) complexes [Eu1]-[Eu5] prepared in this way exhibit intense long-life metal-centered luminescence in aqueous media. The aromatic substituent in the position 5 of bipyridine has a significant influence on luminescence parameters and is used to introduce functionality for bioconjugation. The complexes [Eu4] and [Eu5] bearing primary amine groups are ready-to-go luminescent ‘tags’ for peptide labeling

\\\\Expert2\\nbo\\Tetrahedron\\2011, v. 67, p. 597.pdf
Найти похожие

3.
Инвентарный номер: нет.
   


   
    2,2 '-Bipyridinyl carboranes as B,N,N-ligands in cyclometallated complexes of platinum(II) [] / A. M. Prokhorov, P. A. Slepukhin, V. L. Rusinov, V. N. Kalinin, D. N. Kozhevnikov // Chemical Communications. - 2011. - Vol. 47, № 27. - С. 7713-7715
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
O-CARBORANE -- METALLACARBORANES -- PHOTOLUMINESCENT
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
Найти похожие

4.
Инвентарный номер: нет.
   


   
    2,6-Bis(5-trifluoromethylpyrazol-3-yl)pyridine : complexation with selected d-metals [Text] : доклад, тезисы доклада / E. F. Khmara, D. L. Chizhov, A. A. Sidorov, G. G. Alexandrov, V. I. Filyakova, G. L. Rusinov, I. L. Eremenko, V. N. Charushin // International conference "Topical Problems of Organometallic and Coordination Chemistry", V Razuvaev lectures, N. Novgorod, September 3-9 2010 : book of abstracts . - Nizhny Novgorod, 2010. - P34 : рис. - Bibliogr. : p. 34 (2 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

Найти похожие

5.
Инвентарный номер: нет.
   


   
    3,3,3-Trifluoro-N-(3-trifluoromethylphenyl)-1,2-propanediamine and its N-mono-and N,N-dicarboxyethyl derivatives: synthesis, protolytic and complexation properties [Electronic resource] / V. Yu. Korotaev, Yu. A. Skorik, A. Yu. Barkov, M. I. Kodess, A. Ya. Zapevalov // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2005. - Vol. 54, № 11. - P2545-2549
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 3,3,3-Trifluoro-N-(3-trifluoromethylphenyl)-1,2-propanediamine (5) was synthesized by the reaction of 2-diazo-1,1,1-trifluoro-3-nitropropane or 3,3,3-trifluoro-1-nitropropene with 3-aminobenzotrifluoride followed by the reduction of the nitro group. The Michael 1,4-addition of diamine 5 to acrylic acid occurs only at the N(1) atom and affords N-mono-or N,N-dicarboxyethyl derivatives 6 and 7, depending on the reactant ratio. Protolytic equilibria 5–7 in aqueous solutions were studied by pH-potentiometry and UV spectroscopy. Only the aliphatic amino group can be protonated in an aqueous solution, while the aromatic amino group remains unprotonated even in 12 M HCl. The stability constants of transition metal (Cu2+, Ni2+, Zn2+) complexes with ligands 5–7 were determined by pH-potentiometric titration. The stability of the complexes and selectivity of the ligands toward Cu2+ ions increase with an increase in the number of N-carboxyethyl groups

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2005, 54 (11), 2545.pdf
Найти похожие

6.
Инвентарный номер: нет.
   


   
    5-Acylmethyl-3-(2-pyridyl)-1,2,4-triazines: Synthesis and Complexes with Cu(II) [Electronic resource] / A. M. Prokhorov, D. N. Kozhevnikov, V. L. Rusinov, A. I. Matern, M. M. Nikitin, O. N. Chupakhin, I. L. Eremenko, G. G. Aleksandrov // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2005. - Vol. 41, № 11. - P1702-1705
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 5-Acylmethyl-3-(2-pyridyl)-1,2,4-triazines are easily prepared from accessible 3-(2-pyridyl)-1,2,4-triazine 4-oxides by reaction of the latter with acetophenone or trifluoroacetone in the presence of NaH. The compounds obtained behaved as efficient ligands in reaction with CuCl2 furnishing dimeric neutral complexes with Cu(II) whose structure was investigated by means of X-ray diffraction analysis

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2005, 41 (11), 1702-1705.pdf
Найти похожие

7.
Инвентарный номер: нет.
   
   A 53


   
    An efficient route to 5,5''-diaryl-2,2':6',2''-terpyridines through 2,6-bis(1,2,4-triazin-3-yl)pyridines [Electronic resource] / V. N. Kozhevnikov, D. N. Kozhevnikov, O. V. Shabunina, V. L. Rusinov, O. N. Chupakhin // Tetrahedron Letters. - 2005. - Vol. 46, № 9. - P1521-1523
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A new route to substituted 2,2`:6`,2``-terpyridines based on a new method for the synthesis of substituted 2,6-bis(1,2,4-triazin-3-yl)pyridines and their inverse electron demand Diels-Alder reaction is shown to be an efficient strategy for the synthesis of structurally diverse terpyridine ligands.

\\\\Expert2\\nbo\\Tetrahedron Letters\\2005, v. 46, p.1521.pdf
Найти похожие

8.
Инвентарный номер: нет.
   
   A 53


   
    An efficient route to 5-(hetero)aryl-2,4'- and 2,2'-bipyridines through readily available 3-pyridyl-1,2,4-triazines [Electronic resource] / V. N. Kozhevnikov, D. N. Kozhevnikov, O. V. Shabunina, V. L. Rusinov, O. N. Chupakhin // Tetrahedron Letters. - 2005. - Vol. 46, № 11. - P1791-1793
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A new route to substituted bipyridines based on a new method for the synthesis of substituted 3-pyridyl-1,2,4-triazines and their aza-Diels-Alder reactions is shown to be an efficient strategy for the preparation of structurally diverse bipyridine ligands.

\\\\Expert2\\nbo\\Tetrahedron Letters\\2005, v. 46, p.1791.pdf
Найти похожие

9.
Инвентарный номер: нет.
   
   A 89


   
    Asymmetric azomethine ligands based on 2-[(2-aminophenyl)aminomethylidene]-3-oxo-3-polyfluoroalkylpropionates and aldehydes [Electronic resource] / Yu. S. Kudyakova, M. V. Goryaeva, Ya. V. Burgart, V. I. Saloutin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2010. - Vol. 59, № 9. - P1753-1760 : рис., табл. - Bibliogr. : p. 1759-1760 (12 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
AZOMETHINES -- ALDEHYDES -- LIGANDS -- NICKEL(II) COMPLEXES -- COPPER(II) COMPLEXES -- ORGANOFLUORINE COMPOUNDS -- X-RAY DIFFRACTION STUDY
Аннотация: The condensation of ethyl 2-[(2-aminophenyl)aminomethylidene]-3-oxo-3-polyfluoroalkyl-propionates with aldehydes (salicylaldehyde, furfural, and benzaldehyde) affords the corresponding azomethine derivatives exhibiting the complexing ability toward copper and nickel ions.

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2010, 59 (9), 1753-1760.pdf
Найти похожие

10.
Инвентарный номер: нет.
   
   A 89


   
    Asymmetric cyclopalladation of 6-ferrocenyl-2,2-bipyridine and 2-ferrocenyl-1,10-phenanthroline [Electronic resource] / L. A. Bulygina, V. I. Sokolov, I. A. Utepova, V. L. Rusinov, O. N. Chupakhin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2007. - Vol. 56, № 5. - P1080-1082
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Cyclopalladation of 6-ferrocenyl-2,2?-bipyridine and 2-ferrocenyl-1,10-phenanthroline in the presence of the N-acylamino acid salt as the asymmetric catalyst was performed. Some reactions of the resulting bicyclic palladium derivatives with tridentate (N,N,C) ligands were studied

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2007, 56 (5), 1080-1082.pdf
Найти похожие

11.
Инвентарный номер: нет.
   


   
    Azolo[5,1-c][1,2,4]triazines and azoloazapurines: synthesis, antimicrobial activity and in silico studies / E. K. Voinkov, R. A. Drokin, V. V. Fedotov [et al.] // ChemistrySelect. - 2022. - Vol. 7, № 5. - Pe202104253
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The present work reports on the synthesis of series of azolo[5,1-c][1,2,4]triazines and derivatives of azoloazapurines. The synthesized compounds were tested in vitro for antibacterial activity against N. gonorrhoeae and antimycotic activity against Trichophyton interdigitale, Epidermophyton floccosum, Microsporum canis and Candida albicans. It was found that 10 compounds of the series of 3-nitroazolo[5,1-c][1,2,4]triazine-4-amines 4 exhibit high antibacterial activity (MIC≤15 μg/ml), but do not exhibit antimycotic activity. For compounds active against N. gonorrhoeae, a biological target was predicted from the pharmacophore search method and homologous modeling was carried out for it. The results of molecular docking using the constructed model of dihydrofolate reductase have a good correlation with in vitro tests. Refined docking showed the similarity of the leading compounds positions in the protein active site. The formation of stable non-covalent bonds of the nitro group with the amino acid residues Lys34/Lys55 makes a major contribution to the orienting effect of ligands.

Найти похожие

12.
Инвентарный номер: нет.
   
   B 62


   
    Bis[N-(2-hydroxyethyl)-beta-alaninato]-copper(II) [Text] / A. V. Pestov, E. V. Peresypkina, A. V. Virovets, N. V. Podberezskaya, Yu. G. Yatluk, Yu. A. Skorik // Acta Crystallographica Section C: Crystal Structure Communications. - 2005. - Vol. 61, № 12. - Pm510-m512
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The CuII ion in the title complex, [Cu(C5H 10NO3)2] or [Cu(He-ala)2] [He-ala = W-(2-hydroxyethyl)-?-alaninate], resides at the inversion centre of a square bipyramid comprised of two facially arranged tridentate He-ala ligands. Each He-ala ligand binds to a CuII ion by forming one six-membered ?-alaninate chelate ring in a twist conformation and one five-membered ethanolamine ring in an envelope conformation, with Cu-N = 2.017 (2) A, Cu-OCoo = 1.968 (1) A and Cu-OOH = 2.473 (2) A. The [Cu(He-ala)2] molecules are involved in a network of O-H?O and N-H?O hydrogen bonds, forming layers parallel to the (101?) plane. The layers are connected into a three-dimensional structure by van der Waals interactions, so that the molecular centres form pseudo-face-centered close packing. © 2005 International Union of Crystallography????

Найти похожие

13.
Инвентарный номер: нет.
   
   C 21


   
    Carborane-Functionalized Polyaza Aromatic Ligands: Synthesis, Crystal Structure, and a Copper(II) Complex [Text] / A. M. Prokhorov, D. N. Kozhevnikov, V. L. Rusinov, O. N. Chupakhin, I. V. Glukhov, M. Yu. Antipin, O. N. Kazheva, A. N. Chekhlov, O. A. Dyachenko // Organometallics. - 2006. - Vol. 25, № 12. - P2972-2977
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A consecutive aromatic nucleophilic substitutions of hydrogen in 1,2,4-triazine 4-oxides and an aza Diels?Alder reaction is a versatile route to carborane-functionalized bi- and terpyridines and their 1,2,4-triazine analogues. The heterocycles facilitate deboronation of the substituted carboranes, and the carborane moiety has a significant influence on the coordination properties of the ligands as well

Найти похожие

14.
Инвентарный номер: нет.
   
   C 51


   
    Chelates of fluoroalkyl containing enaminoketones [Electronic resource] / V. I. Filyakova, D. L. Chizhov, E. F. Khmara, V. N. Charushin // Russian Journal of General Chemistry. - 2010. - Vol. 80, № 1. - P190-201
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The structure and areas of practical application of fluoroalkyl containing enaminoketone chelates with d-metals are reviewed. Synthesis of ligands and the routes to the regioisomeric enaminoketones are also considered

\\\\Expert2\\nbo\\Russian Journal of General Chemistry\\2010, V. 80, N 1, p.190.pdf
Найти похожие

15.
Инвентарный номер: нет.
   
   C 52


   
    Chiral palladium complexes with monoterpenoids oximes [Electronic resource] / O. A. Gur'eva, O. A. Zalevskaya, L. L. Frolova, I. N. Alekseev, P. A. Slepukhin, A. V. Kuchin // Russian Journal of General Chemistry. - 2014. - Vol.84, №1. - С. 137-142. - Bibliogr. : p. 142 (16 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CIS-VERBANONE -- MENTHONE -- OXIMES
Аннотация: Oximes of cis-caran-4-one, 3α- and 3β-hydroxycaran-4-ones, cis-verbanone, menthone, and 2β-hydroxybornan-3-one have been synthesized. The obtained oximes react with lithium tetrachloropalladate to give new chiral palladium complexes containing mono-or bidentate oxime ligands

\\\\expert2\\nbo\\Russian Journal of General Chemistry\\2014, V. 84, N 1, p. 137–142.pdf
Найти похожие

16.
Инвентарный номер: нет.
   
   C 73


   
    Combination of the Snh/aza-diels–alder reactions as effective synthetic approach to 8-hydroxy(methoxy)-substituted 2-[6-(1-methylindol-3-yl)pyridin-2-yl]quinoline ligands/fluorophores / M. I. Savchuk, D. S. Kopchuk, I. N. Egorov [et al.] // Russian Journal of General Chemistry. - 2021. - Vol. 91, № 5. - P779-784
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
AZA-DIELS–ALDER REACTION -- 1,2,4-TRIAZINES -- 8-METHOXYQUINOLINE -- DEMETHYLATION -- AUTOCLAVE
Аннотация: 8-Hydroxy(methoxy)-substituted 2-[6-(1-methylindol-3-yl)pyridin-2-yl]quinoline ligands were synthesized by means of combination of SNH reaction between 8-methoxy-substituted 2-(6-aryl-1,2,4-triazin-3-yl)quinolones and indole and aza-Diels–Alder reaction of the obtained 1,2,4-triazines with 2,5-norbornadiene. The demethylation of quinoline moiety of 1,2,4-triazine precursor during aza-Diels–Alder reaction in autoclave was demonstrated.

Найти похожие

17.
Инвентарный номер: нет.
   
   C 74


   
    Complexes of mono- and bis(2-carboxyethyl)-2-picolylamine: Synthesis and crystal and molecular structures [Electronic resource] / A. V. Pestov, A. E. Permyakov, P. A. Slepukhin, L. K. Neudachina, Yu. G. Yatluk // Russian Journal of Coordination Chemistry. - 2010. - Vol. 36, № 10. - P769-777
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: N-(2-Pyridylmethyl)iminodipropionic (I) and N-(2-pyridylmethyl)-3-aminopropionic acids (II) were obtained. A reaction of acid I with a Cu(II) salt gave a 2: 2 complex (III); a reaction of acid II with a Ni(II) salt yielded a 1 : 2 complex (IV). The crystal structures of these complexes were determined by X-ray diffraction. The abilities of compounds I and II to form complexes were compared with the literature data for other ligands containing the N-(2-pyridylmethyl)amino fragment. The structural features of the chelate complexes with 2-aminomethylpyridine derivatives were revealed, depending on the other substituents and the metal center

\\\\Expert2\\nbo\\Russian Journal of Coordination Chemistry\\2010, v. 36, N. 10, p.769.pdf
Найти похожие

18.
Инвентарный номер: нет.
   


   
    Copper(II) and cobalt(II) complexes based on methyl trifluorosalicylate and bipyridine-type ligands: synthesis and their antimicrobial activity / E. V. Shchegolkov, I. V. Shchur, Y. V. Burgart [et al.] // Polyhedron. - 2021. - Vol. 194. - P114900
Рубрики: ХИМИЧЕСКИЕ НАУКИ

Найти похожие

19.
Инвентарный номер: нет.
   
   C 91


   
    Crystal structure of N-(2-hydroxyethyl)-beta-alanine and racemic mixture of the coordination stereoisomers of N-(2-hydroxyethyl)-beta-alaninatonickel(II) [Electronic resource] / A. V. Pestov, P. A. Slepukhin, A. V. Virovets, N. V. Podberezskaya, Yu. G. Yatluk // Journal of Structural Chemistry. - 2008. - Vol. 49, № 1. - P102-108
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: N-(2-Hydroxyethyl)-?-alaninatonickel(II) was synthesized by the interaction of basic nickel carbonate with N-(2-hydroxyethyl)-?-alanine. The structures of the chelating agent and its nickel complex were studied by single crystal X-ray diffraction. In the synthesized compound, the nickel ion lies at the center of an octahedron of the N and 2O donor atoms of two tridentate ligands, each ligand having a meridional conformation. The ligands around the central atom are arranged in perpendicular planes. This coordination of two ligands yields two stereoisomers, whose cocrystallization affords a racemate

\\\\Expert2\\nbo\\Journal of Structural Chemistry\\2008, V. 49, N 1, p.102.pdf
Найти похожие

20.
Инвентарный номер: нет.
   
   C 91


   
    Crystal structure of N-(3-hydroxypropyl)-beta-alanine and Bis(N-(3-hydroxypropyl)-beta-alaninato)dicopper(II) [Cu2 (Pro-ala)2] [Electronic resource] / A. V. Pestov, P. A. Slepukhin, L. S. Molochnikov, M. A. Ezhikova, M. I. Kodess, Yu. G. Yatluk // Russian Journal of Inorganic Chemistry (Zhurnal Neorganicheskoi Khimii). - 2010. - Vol. 55, № 2. - P201-208
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: N-(3-Hydroxypropyl)-beta-alanine was synthesized by the reacti on of 3-aminopropanol with acrylic acid. From this ligand and basic copper carbonate, bis(N-(3-hydroxypropyl)-beta-alaninato)dicopper(II) [Cu2 (C6H11NO3)2] was obtained. The structures of the chelating agent and the copper complex were studied by X-ray diffraction. The Cu(II) coordination polyhedron is a distorted square pyramid. Each ligand forms six-membered ?-alaninate and propanolamine chelate rings. The propoxy group functions as a bridge. In the crystal structure, the molecules form intermolecular coordination bonds C=OCu, which are perpendicular to the layers. The EPR signal typical of dimeric copper complexes is not observed due to low occupancy of the excited paramagnetic triplet state. The weak paramagnetic signal from monomeric copper complex allowed recording of the 1H NMR spectrum of [Cu2 (Pro-ala) 2] with characteristic line broadening and contact shift. It follows from the obtained data that on dissolution, the complex dissociates by 40% to give monomeric copper complexes

\\\\Expert2\\nbo\\Russian Journal of Inorganic Chemistry\\2010, v. 55, N 2, с.201.pdf
Найти похожие

 1-20    21-40   41-60   61-75 
 

Сиглы отделов ЦНБ УрО РАН


  бр.ф. - Бронированный фонд

  бф - Научно-библиографический отдел

  БХЛ - Фонд художественной литературы

  ИИиА -Фонд исторической литературы в ЦНБ УрО РАН

  ИМЕТ -Отдел ЦНБ в Институте металлургии УрО РАН

  кх - Отдел фондов (книгохранениe)

  МБА - Межбиблиотечный абонемент

  мф - Методический фонд

  ок - Отдел научной каталогизации

  оку - Отдел комплектования и учета

  орф - Обменно-резервный фонд

  пф - Читальный зал деловой и патентной информации

  рк - Фонд редкой книги

  ч/з - Главный читальный зал

  эр - Зал электронных ресурсов

  

Сиглы библиотек институтов и НЦ УрО РАН
© Международная Ассоциация пользователей и разработчиков электронных библиотек и новых информационных технологий
(Ассоциация ЭБНИТ)
Яндекс.Метрика