Synthesis, crystal structure modeling and thermal decomposition of yttrium propionate [Y2(CH3CH2COO)6·H2O]·3.5H2O

Nasui, M.; Bogatan, C.; Ciontea, L.; Petrișor, T.

doi:10.1016/j.jaap.2012.05.003

Cited by 21 publications

(9 citation statements)

References 19 publications

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“…In fact, first, between 300 and 400°C, the remaining YProp 3 decomposes to Y-oxycarbonate, Y 2 O 2 CO 3 , observed by FTIR in Fig. 7a and in agreement with [24,32,33,42]. This occurs upon release of CO 2 , acetaldehyde and 3-pentanone (TG-FTIR in Fig.…”

Section: Thermal Decomposition Of Yprop 3 /Tea (A) Decomposition In Osupporting

confidence: 62%

“…In this work, we will apply thermal analysis (TA) on film samples, despite the limitation of the small sample amount in films which pushes TA techniques to their limits. We will provide a closer look on the pyrolysis of FF-YBa 2 Cu 3 O 7-∂ (YBCO) films [27][28][29], a high temperature superconductor (HTS) [30,31], by studying in-situ the effect of TEA on each of the three metalorganic salts used for the fabrication of YBCO with chemical methods: YProp 3 [22,24,32,33], CuProp 2 [20,[34][35][36], Ba-Prop-Ac [18]. Humid O 2 atmospheres will be studied in comparison to inert atmospheres, as the former are normally used during YBCO pyrolysis.…”

Section: Introductionmentioning

confidence: 99%

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Effect of triethanolamine on the pyrolysis of metal-propionate-based solutions

Rasi

Ricart

Obradors

et al. 2019

Journal of Analytical and Applied Pyrolysis

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The effect of triethanolamine (TEA) on single-salt propionate-based solutions used to prepare YBa 2 Cu 3 O 7-∂ (YBCO) has been studied through thermal analysis, for film and powder samples. Decomposition has been followed by thermogravimetry (TG) coupled to differential scanning calorimetry (DSC) and evolved gas analysis (EGA-MS and TG-FTIR), while chemical characterization has been carried out by FTIR, XRD and EA. The addition of TEA has little effect on the decomposition of Ba-Prop-Ac. Conversely, the thermal behavior of CuProp 2 and YProp 3 film with TEA becomes more gradual and less affected by a change of atmosphere than the TEA-free case. This is explained by the fact that the decomposition mechanism is driven by the formation of an ester between the propionate groups and the TEA's OH groups, which is promoted by inert atmospheres and temperatures above 200°C. Just as the single salt precursors, the Ba and Y films show residual organic material at 500°C in thick films decomposed in O 2 .

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Section: Thermal Decomposition Of Yprop 3 /Tea (A) Decomposition In Osupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Effect of triethanolamine on the pyrolysis of metal-propionate-based solutions

Rasi

Ricart

Obradors

et al. 2019

Journal of Analytical and Applied Pyrolysis

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“…The formation of one or two coordination bonds by hmta in 2 – 5 leads to differentiation of energy of CN and CH oscillators, which reflects in multiplication of the majority of hmta bands (to doublet, triplet or even quartet) in the spectra of these compounds . The splitting of bands assigned to vibrations of CC and CH bonds of carboxylate anions results from a different structural environment of each carboxylate anion in a particular compound and consequently involving them in different intermolecular interactions. Additionally, the butyrate anions in compound 4 exist in two conformations (gauche and anti), which also causes the multiplication of mentioned bands.…”

Section: Resultsmentioning

confidence: 99%

Structurally diverse coordination compounds of zinc as effective precursors of zinc oxide nanoparticles with various morphologies

Świątkowski

Kruszyński

2019

Applied Organom Chemis

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The structurally diverse coordination compounds of zinc were designed and synthesized using two types of building blocks: short‐chain carboxylate ions and hexamethylenetetraamine. They were characterized by X‐ray crystallography, infrared spectroscopy and thermal analysis. The studied compounds were used as precursors for production (via controlled thermal conversion) of zinc oxide nanoparticles. The conversion process was optimized in terms of two parameters (heating rate and maximum temperature). Such an approach, combined with proper design of the precursor structure, allows fabrication of various zinc oxide micro‐ and nanoparticles. The influence of a precursor structure and modifications of conversion parameters on size and morphology of ZnO particles were studied and discussed.

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“…Since removal of all organic material is important, usually short chain metal salts are the chosen starting material for the precursor solution. As both steps need to be optimized for the final film's properties and performance, an increasing number of studies can be found concerning growth analysis [5] and pyrolysis of metal salts like propionates and acetates of yttrium [6][7][8][9], copper [3,[10][11][12][13][14][15] and barium [16,17].…”

Section: Introductionmentioning

confidence: 99%

Thermal decomposition of CuProp2: In-situ analysis of film and powder pyrolysis

Rasi

Silveri

Ricart

et al. 2019

Journal of Analytical and Applied Pyrolysis

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The thermal decomposition of CuProp2 in the form of film and powder was studied in different atmospheres by means of thermal analysis techniques (TG-MS, TG-IR, EGA), chemical-structural methods (FTIR, XRD, EA) and computational thermochemistry (VASP/PBE). The decomposition mechanism in terms of volatiles evolved was disclosed with the aid of ab-initio modeling; it was found to be dependent on the gas diffusion in and out of the sample and accelerated by a humid atmosphere. In films, the copper redox behavior showed sensitivity to the residual atmosphere. Finally, the role of the metal center is discussed in the frame of a general decomposition mechanism for metal propionates. Volatile species evolved during decomposition can be detected by means of thermogravimetry (TG) coupled with Evolved Gas Analysis (EGA), which mainly works by infrared (EGA-FTIR or TG-FTIR) or by mass spectrometry (EGA-MS or TG-MS) detection. In fact, by EGA-FTIR and EGA-MS, it was shown that the decomposition of propionates in inert atmospheres involves formation of radicals C2H5• and C2H5CO• (along with CO2) and their recombination to form a symmetrical ketone [20-22]. For longer chain salts such as Ca(II)decanoate, techniques like pyrolysis coupled to gas chromatography (GC) revealed a more complicated scenario where normal alkanes were found along with several symmetrical ketones [23]. For odd chain length of Cu(II)carboxylates like Cu(II)propionate, only MS has been used for the in-situ EGA analysis and 2-pentanone (asymmetrical ketone) was reported to be the main decomposition product [11]. Formation of this asymmetrical ke-tone implies cleavage of a CeC(C]O) bond, instead of the expected CeC(]O) and C(]O)eO bonds. Conversely, no ketones at all were observed for even chain carboxylates of copper(II) [24], mercury(II) [25] and silver(I) [26]. In fact, references [24,25] report on the

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Synthesis, crystal structure modeling and thermal decomposition of yttrium propionate [Y2(CH3CH2COO)6·H2O]·3.5H2O

Cited by 21 publications

References 19 publications

Effect of triethanolamine on the pyrolysis of metal-propionate-based solutions

Effect of triethanolamine on the pyrolysis of metal-propionate-based solutions

Structurally diverse coordination compounds of zinc as effective precursors of zinc oxide nanoparticles with various morphologies

Thermal decomposition of CuProp2: In-situ analysis of film and powder pyrolysis

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