Artículos de revistas sobre el tema "Anorganische Synthese"

Im IGF-Projekt Nr. 19617 N wurden stickstoff- und phosphorsubstituierte Alkoxysilane hergestellt und ihre flammhemmenden Eigenschaften für Textilien untersucht. Die Synthesen erfolgten nach unterschiedlichen Strategien wie der Klick-Chemie und der nukleophilen Substitution kommerziell erhältlicher Organophosphorverbindungen mit aminobasierten Trialkoxysilanen und/oder Cyanurchlorid. Diese neuartigen, halogen- und aldehydfreien Flammschutzmittel wurden auf Stoffe aus Baumwolle (BW), Polyethylenterephthalat (PET), Polyamid (PA), sowie Mischgeweben daraus mit der industriell etablierten Pad-Dry-Cure-Technik und mittels Sol-Gel-Verfahren aufgetragen. Die flammhemmenden Eigenschaften wurden mit den Prüfverfahren nach EN ISO 15025 (Schutzkleidung – Schutz gegen Hitze und Flammprüfverfahren für begrenzte Flammenausbreitung) bewertet. Eine gute Schwerentflammbarkeit der hybriden organisch-anorganischen Materialien wurde bei einer geringen Menge von 3-5 Gew.-% auf Baumwollgeweben erreicht. Darüber hinaus konnten die Wasserlöslichkeit und die Waschbeständigkeit durch die an das Phosphoratom gebundenen funktionellen Gruppen und durch die Optimierung der Härtungstemperatur kontrolliert werden. Insgesamt zeigte das Forschungsprojekt, dass N-P-Silane sehr gute permanente Flammschutzmittel für Textilien sind.

Compounds of the Tl4LnTe3 (Ln-Nd, Sm, Tb, Er, Tm) composition were synthesized by the direct interaction of stoichiometric amounts of thallium telluride Tl2Te elementary rare earth elements (REE) and tellurium in evacuated (10-2 Pa) quartz ampoules. The samples obtained were identified by differential thermal and X-ray phase analyses. Based on the data from the heating thermograms, it was shown that these compounds melt with decomposition by peritectic reactions. Analysis of powder diffraction patterns showed that they were completely indexed in a tetragonal lattice of the Tl5Te3 type (space group I4/mcm). Using the Le Bail refinement, the crystal lattice parameters of the synthesized compounds were calculated.It was found that when the thallium atoms located in the centres of the octahedra were substituted by REE atoms, there occurred a sharp decrease in the а parameter and an increase in the с parameter. This was due to the fact that the substitution of thallium atoms with REE cations led to the strengthening of chemical bonds with tellurium atoms. This was accompanied by some distortion of octahedra and an increase in the с parameter. A correlation between the parameters of the crystal lattices and the atomic number of the lanthanide was revealed: during the transition from neodymium to thulium, therewas an almost linear decrease in both parameters of the crystal lattice, which was apparently associated with lanthanide contraction. The obtained new compounds complement the extensive class of ternary compounds - structural analogues of Tl5Te3 and are of interest as potential thermoelectric and magnetic materials. References1. Berger L. I., Prochukhan V. D. Troinye almazopodobnyepoluprovodniki [Ternary diamond-like semiconductors].Moscow: Metallurgiya; 1968. 151 p. (In Russ.)2. Villars P, Prince A. Okamoto H. Handbook ofternary alloy phase diagrams (10 volume set). MaterialsPark, OH: ASM International; 1995. 15000 p.3. Tomashyk V. N. Multinary Alloys Based on III-VSemiconductors. CRC Press; 2018. 262 p. DOI: https://doi.org/10.1201/97804290553484. Babanly M. B., Chulkov E. V., Aliev Z. S. et al. Phasediagrams in materials science of topological insulatorsbased on metal chalkogenides. Russian Journal ofInorganic Chemistry. 2017;62(13): 1703–1729. DOI:https://doi.org/10.1134/S00360236171300345. Imamaliyeva S. Z., Babanly D. M., Tagiev D. B.,Babanly M. B. Physicochemical aspects of developmentof multicomponent chalcogenide phases having theTl5Te3 structure. A Review. Russian Journal of InorganicChemistry. 2018;63(13): 1703–1724 DOI: https://doi.org/10.1134/s00360236181300416. Asadov M. M., Babanly M. B., Kuliev A. A. Phaseequilibria in the system Tl–Te. Izvestiya Akademii NaukSSSR, Neorganicheskie Materialy. 1977;13(8): 1407–1410.7. Okamoto H. Te-Tl (Tellurium-Thallium). Journalof Phase Equilibria. 2001;21(5): 501. DOI: https://doi.org/10.1361/1054971007703398338. Schewe I., Böttcher P., Schnering H. G. The crystalstructure of Tl5Te3 and its relationship to the Cr5B3.Zeitschrift für Kristallographie. 1989;188(3-4): 287–298.DOI: https://doi.org/10.1524/zkri.1989.188.3-4.2879. Böttcher P., Doert Th., Druska Ch., Brandmöller S.Investigation on compounds with Cr5B3 and In5Bi3structure types. Journal of Alloys and Compounds.1997;246(1-2): 209–215. DOI: https://doi.org/10.1016/S0925-8388(96)02455-310. Imamalieva S. Z., Sadygov F. M., Babanly M. B.New thallium neodymium tellurides. InorganicMaterials. 2008;44(9): 935–938. DOI: https://doi. org/10.1134/s002016850809007011. Babanly M. B., Imamalieva S. Z., Babanly D. М.,Sadygov F. M. Tl9LnTe6 (Ln-Ce, Sm, Gd) novel structuralTl5Te3 analogues. Azerbaijan Chemical Journal. 2009(1):122–125. (In Russ., abstract in Eng.)12. Imamaliyeva S. Z., Tl4GdTe3 and Tl4DyTe3 –novel structural Tl5Te3 analogues. Physics andChemistry of Solid State. 2020;21(3): 492–495. DOI:https://doi.org/10.15330/pcss.21.3.492-49513. Wacker K. Die kristalstrukturen von Tl9SbSe6und Tl9SbTe6. Z. Kristallogr. Supple. 1991;3: 281.14. Doert T., Böttcher P. Crystal structure ofbismuthnonathalliumhexatelluride BiTl9Te6. Zeitschrift für Kristallographie - Crystalline Materials. 1994;209(1):95. DOI: https://doi.org/10.1524/zkri.1994.209.1.9515. Bradtmöller S., Böttcher P. Darstellung undkristallostructur von SnTl4Te3 und PbTl4Te3. Zeitschriftfor anorganische und allgemeine Chemie. 1993;619(7):1155–1160. DOI: https://doi.org/10.1002/zaac.1993619070216. Voroshilov Yu. V., Gurzan M. I., Kish Z. Z.,Lada L. V. Fazovye ravnovesiya v sisteme Tl-Pb-Te ikristallicheskaya struktura soedinenii tipa Tl4BIVX3 iTl9BVX6 [Phase equilibria in the Tl-Pb-Te system andthe crystal structure of Tl4BIVX3 and Tl9BVX6 compounds].Izvestiya Akademii nauk SSSR. Neorganicheskiematerialy. 1988;24: 1479–1484. (In Russ.)17. Bradtmöller S., Böttcher P. Crystal structure ofcopper tetrathallium tritelluride, CuTl4Te3. CuTl4Te3.Zeitschrift für Kristallographie - Crystalline Materials.1994;209(1): 97. DOI: https://doi.org/10.1524/zkri.1994.209.1.9718. Bradtmöller S., Böttcher P. Crystal structure ofmolybdenum tetrathallium tritelluride, MoTl4Te3.Zeitschrift für Kristallographie – Crystalline Materials.1994;209(1): 75. DOI: https://doi.org/10.1524/zkri.1994.209.1.7519. Babanly M. B., Imamalieva S. Z., Sadygov F. M.New thallium tellurides with indium and aurum.Chemical Problems (Kimya Problemlәri). 2009; 171–174.(In Russ., abstract in Eng.)20. Guo Q., Chan M., Kuropatwa B. A., Kleinke H.Enhanced thermoelectric properties of variants ofTl9SbTe6 and Tl9BiTe6. Chemistry of Materials.2013;25(20): 4097–4104. DOI: https://doi.org/10.1021/cm402593f21. Guo Q., Assoud A., Kleinke H. Improved bulkmaterials with thermoelectric figure-of-merit greaterthan 1: Tl10–xSnxTe6 and Tl10–xPbxTe6. Advanced EnergyMaterials. 2014;4(14): 1400348-8. DOI: https://doi.org/10.1002/aenm.20140034822. Bangarigadu-Sanasy S., Sankar C. R., SchlenderP., Kleinke H. Thermoelectric properties of Tl10-xLnxTe6, with Ln = Ce, Pr, Nd, Sm, Gd, Tb, Dy, Hoand Er, and 0.25<x<1.32. Journal of Alloys andCompounds. 2013;549: 126–134. DOI: https://doi.org/10.1016/j.jallcom.2012.09.02323. Shi Y., Sturm C., Kleinke H. Chalcogenides asthermoelectric materials. Journal of Solid StateChemistry. 2019; 270: 273–279. DOI: https://doi.org/10.1016/j.jssc.2018.10.04924. Piasecki M., Brik M. G., Barchiy I. E., Ozga K.,Kityk I. V., El-Naggar A. M., Albassam A. A.,Malakhovskaya T. A., Lakshminarayana G. Bandstructure, electronic and optical features of Tl4SnX3(X= S, Te) ternary compounds for optoelectronicapplications. Journal of Alloys and Compounds.2017;710: 600–607. DOI: https://doi.org/10.1016/j.jallcom.2017.03.28025. Reshak A. H., Alahmed Z. A., Barchij I. E.,Sabov M. Yu., Plucinski K. J., Kityk I. V., Fedorchuk A. O.The influence of replacing Se by Te on electronicstructure and optical properties of Tl4PbX3 (X = Se orTe): experimental and theoretical investigations. RSCAdvances. 2015;5(124): 102173–102181. DOI: https://doi.org/10.1039/C5RA20956K26. Malakhovskay-Rosokha T. A., Filep M. J.,Sabov M. Y., Barchiy I. E., Fedorchuk A. O. Plucinski K. J.IR operation by third harmonic generation of Tl4PbTe3and Tl4SnS3 single crystals. Journal of Materials Science:Materials in Electronics. 2013;24(7): 2410–2413. DOI:https://doi.org/10.1007/s10854-013-1110-927. Isaeva A., Schoenemann R., Doert T. Syntheses,crystal structure and magnetic properties of Tl9RETe6(RE = Ce, Sm, Gd). Crystals. 2020;10(4): 277–11. DOI:https://doi.org/10.3390/cryst1004027728. Bangarigadu-Sanasy S., Sankar C. R., Dube P. A.,Greedan J. E., Kleinke H. Magnetic properties ofTl9LnTe6, Ln = Ce, Pr, Tb and Sm. Journal of Alloys andCompounds. 2014;589: 389–392. DOI: https://doi.org/10.1016/j.jallcom.2013.11.22929. Arpino K. E., Wasser B. 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Интерес к изучению систем, содержащих сульфиды формулой АIВIIIСVI2, обусловлен, прежде всего, открывающимися возможностями их практического использования в изготовлении нелинейных оптических приборов, детекторов, солнечных батарей, фотодиодов, люминофоров и др. Поэтому в связи с поиском новых перспективных материаловна основе тиогаллата серебра и железа целью этой работы является исследование квазибинарного разреза FeGa2S4–AgGaS2 четырехкомпонентной системы Fe–Ag–Ga–S.Синтез сплавов системы AgGaS2–FeGa2S4 проводили из лигатур с использованием высокой чистоты: железа – 99.995 %, галлия – 99.999 %, серебра – 99.99 % и серы – 99.99 %. Исследование сплавов проводили методами дифференциально-термического, рентгенофазового, микроструктурного анализов, а также измерением микротвердости и определениемплотности.Методами физико-химического анализа впервые изучена и построена Т-x фазовая диаграмма разреза AgGaS2–FeGa2S4, который является внутренним сечением квазитройной системы FeS–Ga2S3–Ag2S. Установлено, что система относится к простому эвтектическому типу. Состав эвтектической точки: 56 мол. % FeGa2S4 и Т = 1100 К. На основе исходных компонентов были определены области твердых растворов. Растворимость на основе FeGa2S4 и AgGaS2 при эвтектической температуре достигает до 10 и 16 мол. % соответственно. С уменьшением температуры твердые растворы сужаются и при комнатной температуре составляют на основе тиогаллата железа (FeGa2S4) 4 мол. % AgGaS2,а на основе тиогаллата серебра (AgGaS2) 11 мол. % FeGa2S4. ЛИТЕРАТУРА 1. Zhаo B., Zhu S., Li Z., Yu F., Zhu X., Gao D. Growth of AgGaS2 single crystal by descending cruciblewith rotation method and observation of properties. Chinese Sci. Bull. 2001; 46(23): 2009–2013. DOI:https://doi.org/10.1007/BF029019182. Горюнова Н. А. Сложные алмазоподобные полупроводники. М.: Сов. радио; 1968. 215 с.3. Абрикосов Н. Х., Шелимова Л. Е. Полупроводниковые материалы на основе соединений АIVBVI..М.:Наука; 1975. 195 с.4. Kushwaha A. 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