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silver oxide thermal decomposition

Hampen-Smith MJ, Kodas TT. R. Szczęsny. The knowledge about thermal properties of precursors is important for the evaporation parameters and determination of the metallated species which can be transported in the gas phase. You do not have JavaScript enabled. Copyright © 2020 Elsevier B.V. or its licensors or contributors. 2005;11(4):195–205. Figure 2a shows the characteristic features of heating silver propionate (5). National Institute of Standarts and Technology (NIST), http://webbook.nist.gov/chemistry/. doi: 10.1016/S0040-6031(99 ... Wong CP. Salt (CH3)3SiCH2COOAg (2) is thermally stable up to 135 °C and decompose greater than this temperature (Fig. Mater Lett. Chem Mater. The spectrum revealed bands derived from carbon dioxide and two doublets at 1339/1325 and 1194/1183 cm−1, indicating the presence of C2F4 [27]. to access the full features of the site or access our, Instructions for using Copyright Clearance Center page. J Therm Anal Calorim. FT-IR spectrum of the volatile products evolved during thermal decomposition of C3F7COOAg (6) (300–320 °C). Analysis of the composition of vapors, formed during thermolysis in nitrogen atmosphere, indicates carbon dioxide and appropriates acids as the main products. Increasing the temperature causes the formation of additional bands at 1885 and 1849 cm−1 (νCOO). This process is connected with one exothermic effect (DTA) with the maximum appeared at 210 °C. The corresponding mass loss on the TG is about 3 %. Above-mentioned signals also appeared in spectra recorded at the second step of decomposition. (1) It was found, by means of the thermal and magnetic balance, that the decomposition temperatures of silver oxide and of silver oxide containing silver carbonate are 354 and 372°C, respectively. The data indicate that carboxylates usually decompose without a melting point (or a melting point is connected with thermolysis) and cannot be efficiently evaporated. The next salt (7), with longer fluorocarbon chain, decomposed in a different mode. If you are not the author of this article and you wish to reproduce material from The caclined samples were characterized by XRD, FE-SEM, TEM and XPS techniques. Polish J Chem. Thermal decomposition of silver carboxylates. The TG, DTA and DTG curves of silver heptafluorobutyrate (6) are presented in Fig. J Chem Soc (A). The second main volatile product was CF3CFO, which was also identified in earlier studies concerning transitions metals trifluoroacetates [22, 23]. Dr. Bruno Pettinger. Article  Direct synthesis of perfluoropolyether thin film on surface by oxidative polymerization of a perfluoropropene–oxygen mixture using an ArF excimer laser. 1975;12:163–6. Liu X, Lu S, Zhang J, Cao W. Silver behenate under high pressure: a powder diffraction study. In this paper, we report a facile method for the preparation of Ag nanoparticles (NPs) via the thermal decomposition of its acetate precursor. This feature most probably comes out from the lower stability of Ag–O bond. The thermal behavior encountered throughout the calcination course of parent silver acetate was studied under air and nitrogen atmospheres. No peak due to hydroxyl oxygen at around 533.6 eV was detected for Ag-600 sample. Thermal decomposition. Adams SK, Edwards DA, Richards R. Silver(I) carboxylates. Fritz‐Haber‐Institut der Max‐Planck‐Gesellschaft, Faradayweg 4–6, D‐14195 Berlin (FRG), Telefax: Int. Our earlier TG-IR studies confirmed that CH3CH2C(CH3)2COOAg (1) and (CH3)3SiCH2COOAg (2) decomposed with formation of several products originating from direct decomposition of molecules such as CO2, and from recombination reactions [12, 18]. On the other hand, variable temperature mass spectra [28] pointed on [Ag2(OOCR)]+ as main stable silver species and this dimeric system may be a volatile precursor in CVD reactor. Inorg Chim Acta. J Therm Anal Calorim. Part 1. max = 350 °C) is resulted from the main thermal decomposition process, and weight loss is about 48 %. The thermal decomposition reactions of CH3CH2C(CH3)2COOAg (1), (CH3)3SiCH2COOAg (2), CF3COOAg (3), (CH3)3CCOOAg (4), C2H5COOAg (5), C3F7COOAg (6), C6F13COOAg (7) and (CF2)3(COOAg)2 (8) were studied in N2 atmosphere using thermogravimetry (TG), derivative thermogravimetry and differential thermal analysis. Schmidt H, Shen Y, Leschke M, Haase Th, Kohse-Höinghaus K, Lang H. Synthese und Verwendung in der Silber-CVD. The first one is a strong endothermic transition at 260 °C, which is connected with a slight mass loss and probably corresponds to the melting point. 2005;79:627–35. The metallic silver is the final product with the presence of carbonaceous species, what is evident from XRD studies of the residue in the crucible [19]. Go to our Uvarov NF, Burleva LP, Mizen MB, Whitcomb DR, Zou C. Conductivity of long-chain silver carboxylates and their thermal decomposition products. Haase T, Kohse-Höinghaus K, Bahlawane N, Djiele P, Jakob A, Lang H. CVD with Tri-nbutylphosphine silver(I) complexes: mass spectrometric investigations and depositions. Thermal and spectroscopic studies of the Ag(I) salts with fluorinated carboxylic and sulfonic acid residues. PubMed Google Scholar. 2005;59:2194–8. All salts were prepared according to previously reported procedures [16–18]. Google Scholar. However, these results may derive not only from the absence of them but also from too small concentration to be detected by an applied method. In the case of (1), (2), (4) and (5), appropriate carboxylic acids and potassium nitrate were suspended in a water–ethanol solution (1:1), heated to 40 °C and stirred, followed by silver nitrate addition. Thermochim Acta. Thermochim Acta. Thermolysis gives rise to the three weight losses in TG curve (about 37, 6 and 9 %). Dryden NH, Vittal JJ, Pudderphatt RJ. Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Additionally, broad bands at 1148 and 1060 cm−1 (C–O stretching absorption) and bands resulted from CH and CO2 vibrations also appear. By continuing you agree to the use of cookies. Chem Vap Deposition. These results allow to assume that CO2 and (CF2)3(COOH)2 are the main gaseous products at temperature less than 350 °C. In the case of CF3COOAg (3), DTA curve indicates four peaks (Fig. In this case, there is a chance that the described transitions are so fast, that we cannot register the anhydride. 1995;1(1):8–23. J Therm Anal Calorim. This assumption is confirmed by the presence of bands at: 1896, 1240, 1210 and 1097 cm−1 [24, 25]. doi: 10.1021/am100456m. I. mass spectra and low frequency infrared spectra.

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