scholarly journals Осаждение слоев сульфидов кадмия и свинца из тиосульфатно-тиомочевинных комплексов и исследование их свойств

2019 ◽  
Vol 21 (2) ◽  
pp. 240-248
Author(s):  
Victor N. Semenov ◽  
Aleksandr V. Naumov ◽  
Tatyana V. Samofalova ◽  
Nadezhda M. Ovechkina
Keyword(s):  
Inorganic Chemistry ◽  
Optical Properties ◽  
Powder Diffraction ◽  
Coordination Compounds ◽  
Complex Compounds ◽  
Inorganic Materials ◽  
State University ◽  
Lead Chalcogenides ◽  
Academy Of Sciences ◽  
Physical Quantities

Представлены результаты исследования пленок сульфидов кадмия и свинца, осажденных методом пиролиза аэрозоля из водных растворов тиомочевинно-тиосульфатных координационных соединений при температуре 400 °С. Исследование ТТКС показало, что в водных растворах, содержащих нитрат кадмия, тиосульфат натрия и тиомочевину с разными молярными соотношениями компонентов, образуются координационные соединения [Cd(SCN2H4)2(bi-S2O3)], а в соответ ствующих по составу растворах нитрата свинца формируются комплексы [Pb(SCN2H4)(bi-S2O3)(H2O)]. Методом инфракрасной спектроскопии установлено, что при образовании смешанных ТТКС свинца, а также кадмия, осуществляется монодентатная координация тиомочевины к катиону металла через атом серы, а тиосульфат-ион координируется бидентатно через серу и кислород. С помощью рентгенофазового анализа установлено, что независимо от соотношения компонентов в исходномрастворе пленки сульфида кадмия кристаллизуются в модификации вюртцита, а пленки сульфида свинца – в кубической структуре. Определена оптическая ширина запрещенной зоны синтезированных пленок, составляющая 2.4±0.01 эВ для сульфида кадмия и 0.50–0.56 эВ для сульфида свинца     REFERENCES Semenov V. N., Naumov A. V. Protsessy napravlennogo sinteza plenok sul’fidov metallov iz tiokarbamidnykh koordinatsionnykh soedineniy [Processes of the directed synthesis of metal sulfi de fi lms from thiocarbamide coordination compounds]. Proceedings of Voronezh State University. Series: Chemistry. Biology. Pharmacy, 2000, no. 2, pp. 50–55. (in Russ.) Semenov V. N., Naumov A. V. Thermal decomposition of cadmium thiourea coordination compounds. Russian Journal of General Chemistry, 2001, v. 71(4), pp. 495–499. https://doi.org/10.1023/A:1012306512566 Tuhtaev R. K., Boldyrev, V. V., Gavrilov A. I., Larionov S. V., Mjachina L. I., Savel’eva Z. A. Sintez sul’fi dov metallov iz serosoderzhashchikh kompleksnykh soedineniy metodom samorasprostranyayushchegosya goreniya [Synthesis of metal sulfi des from sulfur-containing complex compounds by self-propagating combustion]. Inorganic Materials, 2002, v. 38(10), pp. 1173–1180. (in Russ.) Markov V. F., Maskaeva L. N., Ivanov P. N. Gidrohimicheskoe osazhdenie plenok sul’fi dov metallov: modelirovanie i jeksperiment [Hydrochemical deposition of metal sulfi de fi lms: modeling and experiment]. Ekaterinburg, Ural Branch of the Russian Academy of Sciences Publ., 2006, 217 p. (in Russ.) Semenov V. N., Vlasenko N. V. Protsessy kompleksoobrazovaniya v sistemakh tiomochevina – kadmieva sol’ kislorodsoderzhashchey kisloty [Complexation processes in the systems of thiourea – cadmium salt of oxygen-containing acid]. Russian Journal of Inorganic Chemistry, v. 37(4), pp. 929–933. (in Russ.) Ugaj Ja. A., Semenov V. N., Averbah E. M., Shamsheeva I. L. Issledovanie vzaimodeystviya soley kadmiya s tiomochevinnoy pri poluchenii plenok sul’fi da kadmiya [Investigation of the interaction of cadmium salts with thiourea in the preparation of cadmium sulfi de fi lms]. Journal of Applied Chemistry of the USSR, 1988, v. 61(11), pp. 2409–2414. (in Russ.) Egorov N. B., Eremin L. P., Larionov A. M., Usov V. F. Prevrashchenie tiosul’fato-tiomochevinnykh kompleksov svintsa pri nagrevanii [The transformation of thiosulfate-thiourea lead complexes when heated]. Izvestija Tomskogo politehnicheskogo universiteta, 2010, v. 317(3), pp. 99–102. (in Russ.) Egorov N. B., Usov V. F., Fiterer I. P., Eremin L. P., Larionov A.M. Thiosulfatothiourea lead complexes. Russian Journal of Inorganic Chemistry, 2008, v. 53(1), pp. 117–122. https://doi.org/10.1134/S0036023608010166 Powder Diffraction File. Swarthmore: Joint Committee on Powder Diffraction Stan-dards, 1996. 10. Uhanov Ju. I. Opticheskie svojstva poluprovodnikov [Optical properties of semiconductors], Moscow, Nauka Publ., 1977, 367 p. (in Russ.) Uhanov Ju. I. Opticheskie svojstva poluprovodnikov [Optical properties of semiconductors], Moscow, Nauka Publ., 1977, 367 p. (in Russ.) Ravich Ju. I., Efi mova B. A., Smirnov I. A. Metody issledovanija poluprovodnikov v primenenii k hal’kogenidam svinca PbTe, PbSe, PbS [Methods of semiconductor research as applied to lead chalcogenides PbTe, PbSe, PbS]. Moscow, Nauka Publ., 1968, 384 p. (in Russ.) Haritonov Ju. Ja., Brega V. D., Ablov A. V. Russian Journal of Inorganic Chemistry, 1971, v. 16(2), pp. 572–573. (in Russ.) Haritonov Ju. Ja., Brega V. D., Ablov A. V., Proskina N. N. Russian Journal of Inorganic Chemistry, 1974, v. 19(8), pp. 2166–2177. (in Russ.) Freedman A. N., Straughan B. P. Vibrational spectra and structures of some thiosulphate complexes. Acta, 1971, v. 27A, pp. 1455–1465. https://doi.org/10.1016/0584-8539(71)80095-8 Nakamoto K. Infrared and Raman spectra of inorganic and coordination compounds. 4th ed. John Wiley & Sons, 1986. 245 p. Babichev A. P., Babushkina N. A., Bratkovskij A. M. Fizicheskie velichiny: Spravochnik [Physical quantities: Handbook]. Moscow, Jenergoatomizdat Publ., 1991, 1231 p. (in Russ.) Samsonov V. G., Drozdova S. V. Sul’fi dy [Sulphides]. Moscow, Metallurgiya Publ., 1972, pp. 50–55. (in Russ.) Karnushina V. A., Semenov V. N., Lukin A. N., Ovechkina N. M., Nikitin L. M. Properties of led sulfi de f i l m s d e p o s e d f r o m a c o o r d i n a t i o n [Pb(N2H4CS)2(CH3COO)2 ]. Condensed matter and interphases , 2017, v. 19(2), pp. 215–221. (in Russ.)

scholarly journals DEVELOPMENT OF RESEARCH OF CHEMISTRY OF COORDINATION COMPOUNDS IN V.I. VERNADSKY INSTITUTE OF GENERAL AND INORGANIC CHEMISTRY NAS OF UKRAINE: FROM THE 30'S TWENTIETH CENTURY(part1)

2021 ◽  
Vol 87 (11) ◽  
pp. 21-44
Author(s):  
Elena Trunova ◽  
Larisa Koval ◽  
Vasyl Pekhnyo
Keyword(s):  
Inorganic Chemistry ◽  
Coordination Compounds ◽  
Functional Materials ◽  
Complex Compounds ◽  
Biologically Active ◽  
National Academy Of Sciences ◽  
Significant Research ◽  
History Of ◽  
Composition Structure ◽  
The Individual

The review considers the main stages of development of the chemistry of coordination compounds at the Institute of General and Inorganic Chemistry. VI Vernadsky National Academy of Sciences of Ukraine on the occasion of the 90th anniversary of its founding. An overview of complex compounds of p, d, f-me­tals with different classes of ligands (inorganic and organic), features of their synthesis, study of the structure and properties of the obtained compounds, contains current material on the use of synthesized complexes to create functional materials for different purposes. Me­thods of synthesis have been developed, do­zens of new coordination compounds with derivatives of hydrazones, amines, azomethanes, and thiosemicarbazones have been synthesized and isolated in the individual state. Their composition, structure and physicochemical pro­perties are determined. The general regularities that take place in the process of comple­xation of metals with ligands, as well as factors influencing the composition, structure and physico­chemical properties of the obtained coordination compounds are established. For the long history of the Institute has accumulated a huge amount of material on the problems of modern coordination chemistry. Significant research in this area belongs to Ukrainian scientists who have worked long and fruitfully at the Institute: A.K. Babko, K.B. Yatsimirsky, Ya.A. Fialkov, I.A. Sheka, S.V. Volkov, N.A. Kostromina, and who created scientific schools, known not only in Ukraine but also abroad. To date, the attention of scientists of the Institute has shifted from classical monomeric to bigeteronuclear, polynuclear, multiligand complexes, which is primarily due to intensive research of new functional materials: optical and magnetic, biologically active substances, as well as effective adsorbents, chemical sensors, catalysts, catalysts, catalysts and biochemical processes.

scholarly journals Gold-Bearing Brown Coal Deposits of the Zeya–Bureya Sedimentary Basin (East Russia): Fundamental Model of Formation

Minerals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 682
Author(s):  
Anatoliy Petrovich Sorokin ◽  
Andrey Alexeyevich Konyushok ◽  
Valeriy Mikhailovich Kuz’minykh ◽  
Sergey Vadimovich Dugin
Keyword(s):  
Sedimentary Basin ◽  
Complex Compounds ◽  
Inorganic Materials ◽  
Primary Sources ◽  
East Russia ◽  
High Concentrations ◽  
Geochemical Analyses ◽  
Element Transfer ◽  
Bureya Sedimentary Basin ◽  
Gold Bearing

The primary sources and the conditions for the formation of the Paleogene–Neogene coal-bearing deposits in the Zeya–Bureya sedimentary basin were identified and studied with the help of paleogeographic reconstructions and geochemical analyses. Based on the results obtained, we suggest a new basic model of element transfer into the coal, involving two mutually complementary processes to account for the introduction and concentration of gold and other trace elements in the sequences investigated. The first process reflects the system in which peatlands were concentrated along the basin’s junction zone and the passive internal residual mountain ranges. The second reflects the junction’s contrast-type (sharp-type) forms conditions along the external mobile mountain-fold frame. The eroded gold particles were transported over 10–20 km as complex compounds, colloids, dispersed particles, and nanoparticles, and remobilized into clastogenic and dissolved forms along the first few kilometers. The release of gold in the primary sources occurred due to weathering of gold-bearing ore zones, followed by transportation of gold by minor rivers to the areas of peat accumulation. This study considered the probability of the accumulation of high concentrations of gold and rare earth elements (REE) in coal due to the introduction of organic and inorganic materials during floods, with episodes of catastrophic events, and volcano–hydrothermal activities.

PECULIARITIES, TYPOLOGY AND CHRONOLOGY OF THE RUSSIAN REVOLUTIONS AND THE CIVIL WAR IN THE WORKS OF A.V. SHUBIN

2021 ◽  
pp. 104-114
Author(s):  
Valeriy Ljubin ◽  
Keyword(s):  
Civil War ◽  
World History ◽  
Russian Revolution ◽  
State University ◽  
Scientific Publications ◽  
Soviet History ◽  
Russian Academy Of Sciences ◽  
Russian State ◽  
History Of ◽  
Academy Of Sciences

The review analyzes the approaches of the well-known Russian historian A.V. Shubin to the coverage of the typology of revolutions and the features and chronology of the Great Russian Revolution of 1917 and the Civil War of 1918-1922. Alexander Vladlenovich Shubin is Doctor of Historical Sciences, Chief Researcher at the Institute of World History, Russian Academy of Sciences, Professor at Russian State University for the Humanities, author of more than 20 monographs and about 200 scientific publications on the problems of Soviet history and history of leftist ideas and movements.

scholarly journals Reviewer Acknowledgements for Journal of Mathematics Research, Vol. 9, No. 2

2017 ◽  
Vol 9 (2) ◽  
pp. 155
Author(s):  
Sophia Wang
Keyword(s):  
United Arab Emirates ◽  
Medical Center ◽  
State University ◽  
National Academy Of Sciences ◽  
Bulgarian Academy ◽  
University Of Houston ◽  
Institute Of Technology ◽  
Mathematics Research ◽  
Academy Of Sciences

Journal of Mathematics Research wishes to acknowledge the following individuals for their assistance with peer review of manuscripts for this issue. Their help and contributions in maintaining the quality of the journal is greatly appreciated.Many authors, regardless of whether Journal of Mathematics Research publishes their work, appreciate the helpful feedback provided by the reviewers.Reviewers for Volume 9, Number 2  Alberto Simoes, University of Beira Interior, PortugalAli Berkol, Space and Defense Technologies & Baskent University, TurkeyArman Aghili, University of Guilan, IranCecilia Maria Fernandes Fonseca, Polytechnic of Guarda, PortugalGane Sam Lo, Universite Gaston Berger de Saint-Louis, SenegalMarek Brabec, Academy of Sciences of the Czech Republic, Czech RepublicMaria Alessandra Ragusa, University of Catania, ItalyMohammad Sajid, Qassim University, Saudi ArabiaMohd Hafiz, Universiti Sains Malaysia, , MalaysiaN. V. Ramana Murty, Andhra Loyola College, IndiaOlivier Heubo-Kwegna, Saginaw Valley State University, USAOmur Deveci, Kafkas University, TurkeyÖzgür Ege, Celal Bayar University, TurkeyPeng Zhang, State University of New York at Stony Brook, USAPhilip Philipoff, Bulgarian Academy of Sciences, BulgariaRovshan Bandaliyev, National Academy of Sciences of Azerbaijan, AzerbaijanSanjib Kumar Datta, University of Kalyani, IndiaSelcuk Koyuncu, University of North Georgia, USASergiy Koshkin, University of Houston Downtown, USAShenghua Ni, Vanderbilt University Medical Center, USAVishnu Narayan Mishra, Sardar Vallabhbhai National Institute of Technology, IndiaWaleed Al-Rawashdeh, Montana Tech, USAYifan Wang, University of Houston, USAYoussef Ei Foutayeni, Modeling and Simulation Laboratory Lams Hassan II University, MoroccoYoussef El-Khatib, United Arab Emirates University, United Arab EmiratesZoubir Dahmani, University of Mostaganem, Algeria Sophia WangOn behalf of,The Editorial Board of Journal of Mathematics ResearchCanadian Center of Science and Education

scholarly journals Macroscopic x-ray powder diffraction imaging reveals Vermeer’s discriminating use of lead white pigments in Girl with a Pearl Earring

2019 ◽  
Vol 5 (8) ◽  
pp. eaax1975 ◽  
Author(s):  
S. De Meyer ◽  
F. Vanmeert ◽  
R. Vertongen ◽  
A. Van Loon ◽  
V. Gonzalez ◽  
...  
Keyword(s):  
Optical Properties ◽  
Powder Diffraction ◽  
Lead White ◽  
White Pigment ◽  
Microscopic Scale ◽  
X Ray ◽  
Oil Paintings ◽  
Johannes Vermeer ◽  
Diffraction Imaging ◽  
The 19Th Century

Until the 19th century, lead white was the most important white pigment used in oil paintings. Lead white is typically composed of two crystalline lead carbonates: hydrocerussite [2PbCO3·Pb(OH)2] and cerussite (PbCO3). Depending on the ratio between hydrocerussite and cerussite, lead white can be classified into different subtypes, each with different optical properties. Current methods to investigate and differentiate between lead white subtypes involve invasive sampling on a microscopic scale, introducing problems of paint damage and representativeness. In this study, a 17th century painting Girl with a Pearl Earring (by Johannes Vermeer, c. 1665, collection of the Mauritshuis, NL) was analyzed with a recently developed mobile and noninvasive macroscopic x-ray powder diffraction (MA-XRPD) scanner within the project Girl in the Spotlight. Four different subtypes of lead white were identified using XRPD imaging at the macroscopic and microscopic scale, implying that Vermeer was highly discriminatory in his use of lead white.

scholarly journals Life and creative development of academician M. M. Pavlyuchenko

2019 ◽  
Vol 55 (4) ◽  
pp. 502-512
Author(s):  
N. P. Krutko ◽  
V. V. Kokhanovsky ◽  
T. M. Ulyanova ◽  
I. E. Shimanovich
Keyword(s):  
Inorganic Chemistry ◽  
Young People ◽  
Thermal Dissociation ◽  
Chemical Mechanism ◽  
National Academy Of Sciences ◽  
Creative Development ◽  
Wide Audience ◽  
The Government ◽  
Definition Of ◽  
Academy Of Sciences

The article is devoted to the 110 anniversary of the birth of the Belarusian scientist, the founder of the section of chemical science – Chemistry of solids, the organizer and the first director of Institute of the General and Inorganic Chemistry of the National Academy of Sciences of Belarus, academician of the Academy of Sciences of Belarus – Mikhail Mikhaylovich Pavlyuchenko. In the article, the career devoted to search of the implication and chemical mechanism of the processes proceeding with participation of solids is described. Identification of the defining stages (limiting stages) and regularities of thermal dissociation reactions and synthesis of different classes and various structure of substances, as well as the definition of ways to operate these processes are described in this paper. His pedagogical and practical activities were purposeful, he looked for and found the young people interested in scientific research, excited them with his ideas, prepared 40 candidates and 3 Doctors of Chemistry. Together with the academician N. F. Ermolenko and the engineering structure of the institute, he prepared, proved the ways and possibilities of use and enrichment of sylvinites of the Starobinsky field, and repeatedly reported for the government and wide audience on importance of chemical industry development in Belarus. His course of life is a service to science and the Homeland.

scholarly journals Anton Nikitich Yasinsky and the formation of the Belarusian Medieval studies in the 1920s

2021 ◽  
pp. 33-44
Author(s):  
Oleg I. Maliugin
Keyword(s):  
Middle Ages ◽  
Scientific School ◽  
State University ◽  
Medieval Studies ◽  
History Of ◽  
Academy Of Sciences ◽  
The Middle Ages ◽  
Slavic Studies

The article is devoted to the study of the scientific and pedagogical activities of the famous Slavist A. N. Yasinsky in the last – Moscow-Minsk – period of his life based on the materials of the Belarusian archives. Revolutionary events of 1917–1921 forced him, like many other representatives of the capital’s intelligentsia, to look for work in new provincial universities. Since 1922 he has been teaching at the Belarusian State University, becoming one of the founders of Belarusian Medieval and Slavic studies. In 1928 he was elected an academician of the newly created Belarusian Academy of Sciences, where he continued his studies of both the Czech Middle Ages and the history of Belarus in the Middle Ages. However, external circumstances did not allow A. N. Yasinsky to create his own scientific school in Belarus, and his research of the 1920’s remained little known to specialists.

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